5r55e epc solenoid symptoms. ┌П┐ (-_-)┌П┐ '05 Mountaineer Premier 4.
5r55e epc solenoid symptoms. Now its, a bid sluggish going into 4th and then 5th, and finally hitting overdrive. 47:1 2nd = 1. Of course they wanted to pull the transmission Dec 22, 2006 · First off, it is my opinion that the 5R55E is a very very good trans especially concidering that it's based on the somewhat weak and not-so reliable A4LD. If you can get the pan off, you can change the solenoid. The kit contains uniquely designed parts to prevent the loss of pressures within the main line, EPC, solenoid feed and converter circuits. Dec 27, 2000 · 2001, F150, XLT 4x4 October 21, 2007 #18 brooklynbay, you said i have a 4r55e, but i have a green epc. Borg Warner makes an upgraded EPC solenoid without a band which will work on both transmissions. The EPC from tranny has the green One common cause for this is a weak or bent EPC solenoid bracket. My list of items for sale. One Coast Clutch Solenoid (CCS) to control apply and release of coast clutch. Sep 25, 2025 · It helps manage gear shifting by regulating hydraulic pressure for smooth and efficient operation. ┌П┐ (-_-)┌П┐ '05 Mountaineer Premier 4. Compare prices for 5r55e transmission Solenoid EPC from various transmission part suppliers. If vehicle is operated under the following conditions, replace transmission fluid every 50,000 miles: Jun 11, 2014 · From the 3rd link that I provided: 4R44E/4R55E/5R55E COMMON PROBLEMS Q1. 3L, 3. Oct 12, 2016 · I had also adjusted the new Bosch EPC solenoid to smooth out the downshifts. 25" Silver Body And 2 Green Screens With A Bottom . View recommended parts for quality repairs of common transmission problems quickly and easily. 4R/5R55E EPC SOLENOID 97+ BORG Ford 4R44E, 5R44E, 4R55E, 5R55E 11 16 See kit components at www. ©2024 Sonnax Transmission A Marmon / Berkshire Hathaway Company 5R55E (Parts Not Pictured , kits, manuals, etc) Click on a section to see a detailed view. . Under normal operation, transmission is filled for life. Awesome, thanks for the info, much appreciated. On these units (Ranger pickup or Mazda B-series pickup with 2. Aerostar owners thread. These valves are quite active, so they are subject to wear. 00 Free shipping May 17, 2001 · Hello all. Thanks. May 17, 2001 · Background: 2000 XLT SOHC, 5R55E, 88k miles, transmission serviced every 30k, not driven hard, and have only towed one item, my dad's pontoon boat one time last summer for about 30 miles. The valvebody gaskets and EPC solenoid are the worst part and I can honestly say that I do not overhaul 5R55E trans very often. Learn the warning signs of a failing automatic transmission solenoid and how to keep your car shifting smoothly in this informative video from Honest Mechanic. I think there is an Feb 1, 2015 · Known Problems: Common Fix For 4R55E / 5R55E Transmissions With A Bad Separator Plate And Valve Body Gasket can be found HERE. Nov 27, 2024 · Here's another picture of the valve body wiring. May 2, 2019 · FITS EPC SOLENOID: '95+ 4R44E 4R55E 5R44E 5R55E FITS EPC SOLENOID: '00+ 4L30E A4S310R Great service, fast shipping Posted by Daniel Pelnar on May 2nd 2019 Oct 10, 2010 · First off let me say that this forum has helped me tremendously in understanding the 2-3 shift flare issue that plagued the 5r55e. 3 amps, then 0. All other solenoids are tested and rebuilt or replaced. On these engines ONLY, turn the EPC Solenoid Adjuster 1/8 of a turn counter-clockwise(see the photo above). now you have a delayed drive and reverse engagement and have a 2-3 shift issue right???? then its the epc solenoid that has lost the ability to Apr 8, 2010 · Can i change the epc and tcc solenoid without removing the vb, 98 mountaineer 4. 0 engine, 5R55E Tranny. If you own a ranger or explorer you might be experiencing numerous shifting problems. 00:1 4th = 0. Common Symptoms of a Failing Transmission Solenoid Delayed or Erratic Gear Shifting: A damaged solenoid can cause hesitation or unpredictable gear shifts, making your vehicle feel sluggish or unresponsive. If this valve body is to be used is a Ranger Pickup or Mazda B-Series with a 2. 47:1 3rd = 1. These transmissions use an electronic pressure control (regulator) solenoid (EPC) that works hard to maintain a contant pressure as commanded by the computer. If the transmission tester indicates that the Electronic Pressure Control (EPC) solenoid and the shift solenoids are functioning properly, verify the intermediate and overdrive bands for proper adjustment. Use the link above to browse parts not shown in the diagram 4R44E 4R55E 5R55E transmission solenoids,4R44E 4R55E 5R55E transmission TCC & shift solenoids, coast solenoid, speed sensor Jun 30, 2005 · 307-01-1 Automatic Transmission 5R44E and 5R55E 307-01-1 DIAGNOSIS AND TESTING Diagnostic Trouble Code (DTC) Charts Diagnostic Trouble Code Chart **May also be generated by some other non-electric transmission hardware system. 0 SOHC w/5R55E I did the EPC solenoid replacement about 13k miles ago (88k), and have recently been getting the O/D light flashing. 66 each and save 5% Buy 10 for $120. Sep 21, 2005 · Sonnax Transmission parts for Ford 5R55E applicationsJanuary 25, 2023 Uncovering the Root Cause of Pressure & Complaints – The Critical Role of Solenoid Modulator & AFL Valves Maura Stafford May 23, 2010 Is It Safe to Drive? Dan Tucker September 22, 2006 4R44E, 5R55E Case-Wall Movement and Comebacks Gregg Nader May 19, 2006 SonnaFlow® Chart: 4R/5R55E (Normal) May 19, 2006 SonnaFlow® Chart Dec 4, 2010 · Very interesting. 0L, & 4. 1. 9% positive Apr 11, 2020 · What are the symptoms of a bad EPC solenoid? The main driving symptoms that you will notice with the symptoms of a bad transmission control solenoid is that there could be delayed gear shifting, you can’t downshift and your engine will continue to rev, your transmission will be stuck in the neutral position, and the shifting of gears becomes very rough and choppy … Does the EPC solenoid Jul 12, 2000 · Once the pan is down you will have to remove the electrical plug from the solenoid. Jan 31, 2018 · No/Slow Reverse: The SSA solenoid must be turned on, allowing flow through the solenoid, or direct clutch will not apply until EPC rises to 20 psi. This allows the EPC solenoid to back out of the bore, causing low line pressure. Explore the detailed 5r55e parts diagram to identify and understand the components of the 5r55e transmission system for accurate repairs and maintenance. But I do not know which solenoid is the OD Dec 30, 2008 · Hi guys, Just opened up the 5r55e's valve body. 0L & 4. Feb 17, 2012 · I noticed the epc pressure ranged from 10-65 psi while driving, which is low as per the Ford shop manual. I might be a good idea to replace the solenoid bracket while you are replacing the epc solenoid. Feb 27, 2007 · 1983 - 2012 Ranger & B-Series - 4r55e 5r55e Ranger / Explorer Transmission Problems - CLICK HERE - I am making a sticky for the numerous people with transmission problems. Jul 15, 2013 · Hi all, As I continue along my "5R55E adventure" and read through related threads and helpful-hint postings, one question that I see over and over again is regarding valve-body bolt-length and location. The filter/fluid has never been changed and a small piece of band gets lodged in the armature. Turned out the VB Gasket was blown along the strip of solenoids as well as on the small outside strip around the low/reverse servo (not the Feb 8, 2003 · The TransGo Tech was the one who suggested that the EPC solenoid should be replaced. Parts for 5R55E: compare prices for Overhaul Kits, Friction Kits, Bushings, Bearing, Solenoid Kits, Valve body, Torque converters, Planetary Gear kits, Filters Sep 30, 2005 · The plug separating the EPC solenoid from the 1-2 shift valve becomes very loose due to opposing forces and allows EPC oil pressure to flow past and stroke the 1-2 valve, causing 2nd gear starts. Some of my pictures are not the greatest but they will get the point across. Oct 4, 2025 · 4R44E 4R55E 5R55E EPC SOLENOID 97-up Electronic Pressure Control 50155 Phoenix Transmission Parts (34595) 98. Many techs may mistake this transmission for the 5AT 5 speed. When a shift solenoid circuit code sets, the computer shuts the failed solenoid off. Always install new servo pistons. The part arrived in plastic (inside a small box) and the part was soaked with oil, more so than would seem needed to prevent rust. All Rights Reserved. according to the links above, and where i got my info from initially, it says the green one is 4R44E transmission EPC solenoid 1995-96 and the red one is 4R55E 4R44E 5R55E transmission EPC solenoid 1997-on (Also used in 4L30E 2000-on) Aug 7, 2014 · Did the used valve body come with an EPC solenoid or did you swap the original EPC solenoid from the first valve body? If so, is this the original EPC solenoid? My list of useful threads. Fluid and filter changes are not required under normal operation. Connect the electronic pressure control (EPC) solenoid electrical connector. 6 for TW 170 heads 205 ported on 337 SBF. Jul 5, 2000 · I want to test the EPC solenoid and the other shift solinoids in my tranny on my 97' Mountaineer. Also I need a link on where to get a in/lbs Torque Wrench. This valve body is better than OEM, it features many upgrades to increase reliability over the standard OEM valve body. Aug 3, 2000 · A Modest proposal for those 5R55E Owners - EPC Solenoid Replacement Proposal Glacier991 January 2, 2007 Transmissions & Transfer Cases 7 8 9 10 11 12 Replies 236 Views 39,635 February 1, 2011 Apr 8, 2001 · I have a '95 Explorer with a V6 and no overdrive. On the 5R55E shown in Figure 4, the regulated air psi is fed into the isolation tool after removing the EPC force motor. I am also getting the code P0760, which says shift solenoid three is malfunctioning. I had bought one Zip Kit seals critical pressure losses The Sonnax Zip Kit targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the Ford 4R44E, 4R55E, 5R44E and 5R55E valve bodies. For me, I've found that page 6 of the Sonnax Zip booklet is about the best reference I've Feb 12, 2023 · 4r44e 4r55e 5r55e solenoid epc (red screen) 1997-up Automatic transmission Visit the Remco Store Report an issue with this product or seller Aug 15, 2005 · If symptoms don't point to a specific solenoid, only change them based on mileage. I though I might have an EPC issue, maybe with low pressure. It also may be difficult 1983 - 2012 Ranger & B-Series - 4r55e 5r55e Ranger / Explorer Transmission Problems - CLICK HERE - I am making a sticky for the numerous people with transmission problems. I'm pretty sure it's got the 5R55E transmission in it Does your Ford Ranger have a 4R55E transmission? Here are the seven common problems with the Ford 4R55E automatic transmission. Sep 30, 2005 · Sonnax Zip Kit 4R44E-5R55E-ZIP targets the root cause of multiple complaints by sealing the critical circuit pressure losses in the Ford 4R44E, 4R55E, 5R44E and 5R55E valve bodies. From reading numerous threads on here it seems that the updated Prevent excessive high EPC pressure & reduce harsh shift complaints in Ford 4R44E, 4R55E, 5R44E, 5R55E transmissions with Sonnax EPC limit plug kit 37947-55K. Oct 9, 2025 · These upgrades include an Updated EPC bracket, Remanufactured EPC Solenoid, and an Upgraded Pressure Regulator Boost Valve and Sleeve. I am going to try replacing the OD solenoid, new fluid and filter, and adjusting the bands. 66 Free shipping Dec 1, 2004 · Figure 3 illustrates how to make a tool from a 5R55E EPC solenoid. Sep 27, 2025 · 5R55E EPC Pressure Control Solenoid 1996-2011 also fits 5R44E 4R55E Ford Valve Body Pro (404) 99. Thanks for the help these forums have been a plethora of information. 1983 - 2012 Ranger & B-Series - 4r55e 5r55e Ranger / Explorer Transmission Problems - CLICK HERE - I am making a sticky for the numerous people with transmission problems. Oct 18, 2009 · you have a epc solenoid issue, and possibly a valve body gasket is torn and loosing pressure. 0L (4R44E, 5R44E, 5R55E WITH 18 BOLT PAN) MAZDA B SERIES PICKUPS '97-'10 2. You can do this same test using a 4L60-E or 4L80-E force motor to isolate GM torque signal circuits. Jan 25, 2023 · Quickly Find Problems by Vacuum Testing Regardless of the solenoid type, a worn solenoid modulator or AFL valve can create issues that make a perfectly functioning solenoid appear to have failed and have you chasing the root cause of pressure and shift complaints. Sep 30, 2004 · I need a link where to purchase a EPC Solenoid for a 5R55E online. 2000 XLT, 4. com FREE DELIVERY possible on eligible purchases Above is a top and bottom view of the 5R55E Valve Body. (Note) Some links in my list of useful threads are not functional since the Internet constantly changes. - ENGINE TYPE (CYLINDERS AND LITERS). A look at the pressure-regulator valve (Figure 1) may not always reveal a problem. 7 amps, then 1. THEN WE CAN VERIFY THE CORRECT PARTS. Connect shift solenoids SSA, SSB, SSC and SSD electrical connectors. The direct clutch psi will then slowly rise following EPC until clutch holds. Put in new ODS and OSS speed sensors. Automatic Transmission Electronic Pressure Control Solenoid (EPC) 1. 5 L engine) only, use a T-20 Torx driver to turn the EPC solenoid 1/8th of a turn counterclockwise to clear up firm shifts. Aug 7, 2024 · In this article, we will discuss common problems associated with the Ford 5R55E transmission, symptoms and signs to look out for, the consequences of ignoring these issues, and the repair costs involved. For the 5R55S/W the TCC solenoid is a pulse width modulating type and PCA, PCB and PCC are VFS solenoids. Aug 18, 2009 · ISSUE ransmission shifts and/or delayed or no transmission engagements may occur on some vehicl s. Code P0733 takes you to pinpoint test A: Shift solenoid electrical circuit test. It seems these have a useful life of 65,000 miles on Product Description 4R44E 4R55E 5R44E 5R55E / 4L30E Transmission EPC Solenoid - Updated Style Ford / Mazda / Mercury / Honda / Acura / Isuzu / Cadillac / BMW Ford Applications AEROSTAR '97 3. I purchased it with known problems and did a complete rebuild. A1. The PCM controls transmission operation through 6 electronic solenoids. 0 ranger with the same transmission that recently started experiencing the flare. Apr 18, 2011 · The 5R55E is mechanically stronger than the M5OD-R1HD manual, but it suffers from a few shitty parts Ford never addressed. Understand the inner workings of this important component and how it contributes to the overall performance of your vehicle. Band Adjustment: O/D = 1½ turns Intermediate = 1½ turns Reverse = Not Adjustable Gear Ratios: 1st = 2. 0L, & 4 Solution – It may be necessary to place the solenoid body assembly, valve body and/or an in-line filter Common Problems with the 5R55E The 5R55E is electronic, meaning that many of its components are controlled by electronic solenoids. when you are in drive at a full stop thats actually 1st gear till u feel the shift its 2nd and so on. Check the following: fluid level, incorrect line pressure, valve body (EPC solenoid, separator plate), incorrectly tightened valve body bolts (cross-leaks), intermediate band and front band. Both transmissions look very similar externally. Mar 10, 2004 · 1983 - 2012 Ranger & B-Series - 98 Ranger, 5R55E with Blinking O/D light - 98 Ranger 4. Inspect the center support sleeve, sealing rings and direct drum sleeve for Jul 1, 2009 · drdoom is correct there is no aluminum plug in that bore and that is the temperature sensor in the EPC solenoid connector. Good reading, Don 98 Limited"Black Coal", and later KB 2. Click on a part number to view part variations, pricing, and availability. The EPC has worn out far faster than the others, so always change that unless the mileage is extremely low, say under 30K. Symptoms were: right after Christmas, was driving over to pick up a friend to go for a bike ride. *Output circuit check, generated only by electrical symptoms. As far as the action of the solenoids goes, the shift solenoids are either on or off; they either block flow or allow flow. 0L (5R55E WITH 18 BOLT PAN) RANGER '97-'12 2. 3) Had the tranny rebuilt at a local shop, problem still exists. I know Ford used 4R44E, 4R55E, and 5R55E transmissions in the Ranger/Explorers over the years. 0 SOHC 4wd. Remember, this unit has 3rd gear; the problem it has is a 2–3 flare. Ford 4R44E, 5R44E, 4R55E, 5R55E 11 16 See kit components at www. Feb 8, 2003 · For those of you with 5R55E transmissions who either need to or are thinking about replacing the EPC solenoid due to 2-3 shift flare or other potential EPC related issues. This kit seals critical circuit pressure losses in the main line, EPC, solenoid feed, and converter circuits. For the 5R55E I think the TCC solenoid is variable force style (VFS) just like the EPC solenoid and is frequently adjusted by the PCM which increases bore wear. ©2024 Sonnax Transmission A Marmon / Berkshire Hathaway Company Sep 20, 2025 · 4R44E 4R55E 5R55E Transmission EPC Pressure Solenoid 1997-2012 New fits Ford $89. Five Digit DTC Component Description Condition Symptom Action P0112 IAT IAT indicates 125C (254F) (grounded Jun 17, 2025 · New 4R44E 4R55E 5R55E Transmission EPC Pressure Solenoid 97-12 fits Ford $67. From the same circuit the complaint can be delayed reverse, flare 1-2 or 2-3, and harsh shifts following a forced downshift. Sometimes it may offer a clue with wear on a land as shown in Figure 2. The Sonnax Zip Kit 4R44E-5R55E-ZIP addresses the root causes of valve body complaints in Ford 4R44E, 4R55E, 5R44E, and 5R55E transmissions. 3 or 2. 25" 2 Prong Connector (XL2Z-7G383-AA) (5A-451B) (0 260 130 019). 5L engine, the 1-2 shift and the 3-2 coast down shift may be too firm. com. If you run into one of these units, check the bore and the solenoid for wear and install a new bracket, part # XL2Z-7L491-AA. 1 - EPC (Motor Force) Solenoid (BorgWarner). Both servos are charged on the release side in reverse. One Electronic Pressure Control (EPC) solenoid for line pressure control. Aug 26, 2025 · 4R44E / 4R55E / 5R55E / 5R44E. 56431A - Solenoid, 4R44E/4R55E/5R55E EPC (Red Screen) 1997-UpBuy 5 for $126. 75:1 Reverse = 2. I'm in the process of putting everything back together and I was doing the testing on the solenoid (with it out and on my test bench) to check it before putting it back in. 00 Bad Transmission Solenoid Symptoms. Jun 11, 2008 · I had no symptoms of a solenoid issue outside of the TCC failing to lock and the trouble code referred to in that thread. We’ve had a lot of calls on 5R55E with a 2–3 flare and code P0733 (No 3rd Gear). CORE CHARGES AND WARRANTIES RETURNS AND REFUNDS USED PRODUCTS D56431A - 4R44E 5R55E EPC SOLENOID Inventory Low - 2 Left $ 96. I was able to put a pressure test gauge on the transmission Line port and record pressures, along with the ATG Line Pressure Specifications No. An EPC solenoid has 100K on it. Dec 21, 2004 · Figure 3 illustrates how to make a tool from a 5R55E EPC solenoid. If more adjustment is needed, the Check fluid level at every engine oil change. 0L (4R44E, 5R55E) EXPLORER & SPORT TRAC '97-'08 4. This stress causes the bracket to break and the EPC solenoid to back out of its Find a detailed diagram of the 5r55e transmission solenoid and learn about its functions. The Electronic Pressure Control (EPC) solenoid may cause stress on the attaching bracket. If the valve body gasket was blown, wouldn't it not shift or move at all? Sep 21, 2005 · As EPC solenoid output increases, the valve opens to line pressure, further boosting EPC. - NUMBER OF SPEEDS YOUR AUTOMATIC TRANSMISSION HAS. 401 for a Ranger: Both reverse pressures are below spec, and D WOT is below spec. Took it to Cottman yesterday to get the codes pulled, and all that came up was P0741. When the TCC solenoid sets a solenoid circuit code, the computer turns the TCC sole-noid off, disabling lockup. I have a brand new one that was stuck in and removed before driving, if you are interested. Not sure if it is the 4R55E or 4R44E. I had it apart a year ago for the flare issue, and found a ripped gasket, fixed it. But not working. Nov 27, 2024 · Buy EPC Solenoid Compatible With 4R44E 4R55E 5R55E Transmissions Compatible With B2300 B2500 B3000 B4000: Hard Parts - Amazon. Three On/Off solenoids for shifting. One Pulse-Width Modulator (PWM) solenoid for Torque Converter Clutch (TCC) control. All 5R55E questions answered by experts Aug 8, 2012 · The same year as the 5AT Subaru 5 speed transmission. Feb 20, 2013 · My truck is a 1998 Ranger with the 4. Let me know if you discover anything else. If more adjustment is needed, the adjuster can be turned another 1/8th turn. 0 amps. 0 with one from a 99 Explorer. 0 sohc 5r55e Aug 3, 2000 · The EPC solenoid actually just slips into the valve body. Mar 6, 2007 · In this article I hope to address the common fix for the 4r55e / 5r55e with a bad separator plate and valve body gasket. 5% positive Find a detailed diagram of the 5r55e transmission solenoid and learn about its functions. 2) The O/D light started blinking and the converter won't lock up. Apr 22, 2007 · 1983 - 2012 Ranger & B-Series - Changing 5r55e shift solenoids - Can anyone give any tips/ advice on changing the shift solenoids in a 5r55e auto tranny. I have 2004 4. EPC SOLENOID. 1:1 Here is a link to the tech library where more Jul 20, 2021 · Sonnax valve body diagram for 4R44E, 5R44E, 4R55E, 5R55E units. I started with it off, then set it at 0. let me float an idea past you. The one I am looking to replace is #2. Jun 30, 2020 · I was working with a customer once and we were testing a Ford 5R55E EPC solenoid. This should clear up any firm shifts. Dec 22, 2008 · 5R55E SET OF (4) SHIFT COAST SOLENOIDS NEW OEM#F77Z-7G484AB Are these the correct solenoids and should I just replace all four of them while in there. These include the gear shifting mechanisms and the torque converter. Buy other 5r55e transmission parts online. 4) Tourque converter blew up When the EPC solenoid sets a solenoid circuit code, the computer turns the EPC sole-noid off, causing high line pressure and hard shifts. Copyright © 2002 ATRA. Oct 7, 2014 · Explorer, Sport Trac, Mountaineer & Aviator - Solenoid Pack Replacement 5R55S - Finally made a video on this subject that has been neglected for too long. 2. Get 5R55E transmission rebuilding tips, 5R55E troubleshooting help, 5R55E technical service bulletins, 5R55E diagnostics and 5R55E technical information from TRNW. 3. Apr 1, 2004 · Once a pressure gauge has revealed that EPC pressure remains near 0 at any throttle opening (as well as when the transmission is unplugged), the technician usually replaces the EPC solenoid, yet the problem remains. I'm going to be doing a Transgo kit on my 5R55E and I need these last two items to get it going. The EPC solenoid gets stuck and cannot increase line pressure. If either band is out of adjustment, remove the transmission, disassemble and inspect the bands, drums and servo seals for damage. Dec 17, 2008 · If you have a failure of the EPC solenoid, you should also get other symptoms because the EPC solenoid controls the line pressure (main hydraulic pressure) in the transmission. 0L 5R55E auto 4x4 1) I replaced my 98 4. If you would feel free to post here so we can have a running Nov 3, 2006 · hello i have had the 2-3 shift flare since i bought my x but thought i would try replacing the EPC solenoid see if that solves the prob before i rebuild the VB were is the epc located can it be accsessed via the pan looked in my manual but i think i need to get a transmission manual cuz the Apr 9, 2024 · I purchased a new Bosch 5R55E EPC solenoid from a seller on ebay. The unique solenoid alignment referred to as the “Solenoid Six Pack” quickly identifies it as the 4AT 4 speed transmission. Oct 24, 2014 · Hello All, I just replaced the valve body gaskets on my 5r55e transmission after gears were slipping and I was receiving a code for the TCC solenoid. Many feel trans repair is out of their league but some things are too common and predictable this is one of them, and this is how to change it yourself. I ordered the 6 solenoids for it and new valve body gaskets. Feb 24, 2014 · As for the red band EPC, it could work but the calibration is set for the 5R55E transmission. Jul 23, 2020 · 1983 - 2012 Ranger & B-Series - 5r55e problems - I am trying to diagnose and fix my transmission problems in a 2001 Ranger, 4. sonnax. The controller we had was able to vary the current to the solenoid and you would set it to a value and then check on a pressure gauge the output pressure of the solenoid. 00 each and save 10% Jun 19, 2017 · For example, I don't know what EPC solenoid is (at least before I googled it) or why it would go bad more often than whatever other solenoids are in the trans, or why 1-2 shifts would work but 2-3 shifts would be affected. I get a code 648 ("incorrect 4th gear ratio" or somenting like that). My 4R/5R is starting to display an OD light that is flashing, and the shifts are sometimes late, or "soft". You can do this same test using a 4L60-E or 4L80-E force motor to isolate GM torque-signal circuits. Only thing I can tell you is when you pull the pan off, look for the large round thing that is shown in the pictures below. The harsh shifts occur because the EPC “booster” valve gets stuck at maximum flow. New valve body, clutches, servos. Connect the torque converter clutch (TCC) solenoid electrical connector. 3L or 2. 6L AWD 116k miles Nov 21, 2023 · Get the Ford 5R55E ATSG PDF guide with step-by-step transmission repair instructions, diagrams, and troubleshooting tips for DIY or professional use. Thus I only bought the TransGo kit, gaskets, Sonnex boost valve, and an EPC solenoid. ecw ap2kak gwx x7c 4dkef9u u0xr hn1bkz 55obw ge qy1