Warren Diesel Shop PA 16311

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Nathan Sublet

I purchased a 5R110W Competition transmission from Warren Diesel Shop in December 2019. At the time they were highly recommended for my transmission. Everything went smoothly, they shipped my rebuilt transmission and I returned my old one to them on the same crate. While installing the transmission I found the crossmember bolt holes were about 1/2 full of dirt and debris. This wasn't a huge deal since everything else looked beautiful. I cleaned out the holes, chased the threads and installed the transmission. After install the transmission felt solid but never shifted quite like I thought it should. I'm not hard on it and don't put a lot of hard miles on this truck. Fast forward 5 years... A couple months ago while leaving a stop light the 1-2 shift flared revving the engine and before I could let out of it slammed the shift. Immediately the tow/haul light started flashing and my CTS3 picked up a P2701: Transmission Friction Element B Apply Time Range/Performance code. I limped the truck home and started digging into what this might be. Thinking I should get an "expert" opinion on the matter I contact Warren Diesel. I wasn't looking for sympathy or them to warranty anything, just wanted their input on what direction I should start looking. I got one response from Cordell asking, "Does it throw any other codes?" I responded, "No, that is the only code I am getting." That was September 19th @ 3:33pm and I never heard another word from them. Yesterday (11/01/2025) I had a chance to pull the pan off checking solenoids and valve body. Torque specs say 120 in-lbs and the bolts were well in excess of that. After removing the pan and filter I could immediately see the problem. These so called transmission experts didn't put the locking clips on two of my solenoids (SSPC-B & TCC). SSPC-B had slipped back about 1/8" in the valve body and turned 45 degrees. TCC hadn't fully slipped out yet but it was not seated tight in position. Ace Hardware had two 1/2" locking clips for $0.86. I installed the clips, cleaned everything up, put it back together, filled it with fluid and took the truck for a drive. It shifts better than it ever has thanks to locking clips now holding all seven of my solenoids in place. I will never deal with these people again. Their attention to detail and quality control is a joke. The fact they ghosted me makes me wonder if they know the quality of their workmanship is subpar. Thankfully I am mechanically inclined and it didn't cost me another transmission..., yet. I have no idea if something deep in the internals was overlooked and one day will come apart. I feel bad for people who have spent $100's if not $1000's taking their truck to a transmission shop for things just like this. Included with this review are pictures as follows: 1. The day I picked up my rebuilt 5R110W at Saia's dock. 2. My rebuilt 5R110W just before going in the truck. 3. The day it threw the P2701 code. 4. First look at underside of valve body. 5. SSPC-B solenoid closeup showing 1/8" slipped back and turned 45 degrees. 6. SSPC-B, TCC & EPC/PC-A solenoids with only one (EPC/PC-A) having a locking clip installed. 7. The $0.86 fix that could have cost me a transmission. And no, in case you are wondering. The clips did not come off landing in the pan, attaching to the magnet or getting sucked up into the filter. I tore the filter apart to see if they were in there. They were not. This review is simply to let everyone know what they are getting into if you purchase something rebuilt by Warren Diesel Shop. If I had it to do all over again I would have gone with SunCoast or ATS.

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Ryan Gunning

I had my 6R140 Stock Plus transmission installed and my upper oil pan gasket replaced at Warren Diesel Shop, and the entire experience exceeded my expectations. From start to finish, their team was professional, transparent, and incredibly accommodating. They went above and beyond by providing me with a shop vehicle free of charge while the work was being done, which was a huge help. Throughout the process, they allowed me to see exactly what they were working on and walked me through each step, which gave me full confidence in the quality of their workmanship. What really stood out was their attention to detail. They checked everything multiple times, test drove my truck repeatedly, and didn’t let it leave the shop until they were absolutely certain there were no leaks, issues, or codes. It’s clear they take pride in doing things the right way—not the quick way. If you’re looking for a diesel shop that treats your truck like their own, stands behind their work, and truly cares about customer satisfaction, Warren Diesel is the place to go. Highly recommended.

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Brian Madl

Great shop for your Ford PowerStroke transmission! I trailered my truck there from Wisconsin for a new transmission. The day of I thought about it more and decided to upgrade to the Competition transmission instead of the Stock+. They were able to shift things around and get one ready for me. Not ideal I understand but I appreciate them for working with me to get it knocked out, all in 1 day. I drove it home and it's running and driving great!