remanufactured 4l80e on a 1993 2500 chevrolet diesel 6.5 pickup

[roger bunch]

Yeah- @WarWagon has a very valid point, parts are hard to get with everyone on unemployment and can’t find people to work.

You said the shop “wicked wrench” sent the transmission to a tranny shop... try to find out what tranny shop. Stop by and ask that trans shop how long it would take for a rebuild of your type transmission as if new customer. Then tell them they have yours from “wicked” and wondering when it will be done.

Always a good idea to talk to or better yet work directly with the trans shop directly. They might recommend a few things while you have it there but other shop does mark up so you hear a $100 option but trans shop only charges $75. Multiple that profit with 5-6 upgrades.
Then maybe “wicked” shop disagrees with something recommended by transmission shop so you never hear the option.

You finding out right now from actual trans shop if “wicked” didn’t flush cooling lines or didn’t replace tc when recommended. So maybe trans shop messed up, or maybe they are good. Until you hear who messed up from both sides- you don’t know if both shops are garbage or just one place made a mistake or what. Bring that up to transmission shop.

To get name of trans shop from wicked- maybe you just say “What is name of trans shop so you know to not use them in future if mistake was not that of wicked”

i dont think it was wicked that is at fault they just need to pull it and send it in so they can fix there problem

 

[roger bunch]

Did the shop rebuild YOUR trans, or did they give you an exchange unit. I would venture to say 80% of the 4l80e builders don't know that 91-93 has differences vs 94+. We had a GM engineer that worked on the 4l80e design come in here and even he didn't know about the functionality differences between 91-93 and 94+. Swapping in a 94+ into a 91-93 can have bad results like you experienced.

yes they sent me a remanufactured on that has ben upgraded and kept my old tranny

 

[Will L.]

how can you tell the differance between the trannys so they will not get mixed up

How to identify the difference is the same question I and many others asked. I was an ASE certified master mechanic, have rebuilt a couple 4l80e- and had not even a clue of this.

The transmission has to be disassembled to see the difference, or the person doing it has to have an amazing level of knowledge not just about that transmission, that transmission and all it’s variants over the years.

And since it is the most successful transmission ever made- it is nearly impossible.
The guy thefermanator who told you this is an amazingly rare guy to have learned this and track it.

If you go talk to the transmission shop, telling them what he said-chances are they won’t know and will have to research to realize you are right. So not realizing it is common place

You have a legitimate struggle on your hands. The transmission that came out of yours is probably long gone into another rig. Finding the rarely used parts is difficult.

Wether you play this easy with them or lawyer up is the hard part.
But the fact that your rig has sat untouched for a month by the “wicked” place - I would hammer them as hard as possible. Pulling a transmission out is a few hours- no excuse for waiting a month just to pull it and ship to transmission shop. And once they get it to the trans shop- the trans shop will probably take a while to get it done unless it is a JASPER (Who I never recommend) rebuilt trans. Jasper might send a complete one to swap- but that is very very rare.

Best 2 pieces of advice I can give at this point-
1. hit them fast and hard legally. (Idle threat will only make things worse for you either play nice and cross your fingers or say nothing more and let your lawyer handle it. Crap shop hear threats all the time and already been through the fight most likely.)
2. In the future- always take your rig into a transmission specialist for transmission issue- and do research which auto shop and transmission shop to use.

 

[dbrannon79]

This is very interesting! I too would like to know what the differences are between the different models and what makes the older ones fail in the 95 trucks. not that a shade tree mechanic such as myself would attempt a rebuild, but knowing the differences and being able to ask some technical questions to a trans shop just to get the answers from them as to if they know what their doing or not before allowing them to do trans work on our rigs.

I fear the day I may need work done on my trans. but knowing the difference and knowing what to ask and see if their response is worthy for us to allow the shop to do the job would be a bonus to us!

@roger bunch, I agree with Will on the possibility of getting an attorney to get into the middle of this. there's lots of shops out there that hate "warranty work" with a passion simply because they don't get paid to do the re-work. they push you off to get the paying customers first. Customer service and satisfaction is number 1 in my book. have you looked at any yelp reviews on the shop that has your truck? that will tell you right away if you need to get an attorney fast!

 

[WarWagon]

but he never pulled my tranny out yet to send it in to them

This conversation you had with them. You all were being nice and politely asked why they haven't pulled it out yet. Further when it is going to get done? I assume you already paid them for the work. Now it's breach of warranty if they can't fix it.

I am not clear on the "we are not being paid" ... because they can claim labor back on the rebuilder.

We went through five transmissions on a FWD Olds once. From stupid shit like rebuilder leaving a plug loose and all the oil drained out. Spun bearing and a few other failures tossed into the scrap pile. The red stain may now finally be gone from the parking lot it bled out long ago. When that car showed up the shop owner watched employees jump the back fence to leave! They stood beside their warranty as they had a park pawl fall off and service truck rolled back into another vehicle in a parking lot during a lunch break.

I am fond of GM Reman transmissions. But we have a good local trans shop in Phoenix.

 

[roger bunch]

This conversation you had with them. You all were being nice and politely asked why they haven't pulled it out yet. Further when it is going to get done? I assume you already paid them for the work. Now it's breach of warranty if they can't fix it.

I am not clear on the "we are not being paid" ... because they can claim labor back on the rebuilder.

We went through five transmissions on a FWD Olds once. From stupid shit like rebuilder leaving a plug loose and all the oil drained out. Spun bearing and a few other failures tossed into the scrap pile. The red stain may now finally be gone from the parking lot it bled out long ago. When that car showed up the shop owner watched employees jump the back fence to leave! They stood beside their warranty as they had a park pawl fall off and service truck rolled back into another vehicle in a parking lot during a lunch break.

I am fond of GM Reman transmissions. But we have a good local trans shop in Phoenix.

dont know if they are being paid on the labor to pull the tranny or not i just think it should have ben done by now its ben a month for sure now

 

[THEFERMANATOR]

Check the tag that is riveted onto the trans case at the right rear, if it is still there it will tell you what the trans case at least is. Unfortunately the real differences are internal and require some disassembly to spot. The main difference is 91-93 used a EPC(elelectronic pressure control solenoid) that requires a "cleaning cycle" every 10 seconds where the PCM would change the current flow for a split second every 10 seconds from minimum to maximum current and then back to desired. The EPC itself did not have a spring in the valve end for the pressure control valve, so it required balance pressure to be applied to both sides of the valve at all times. And to buffer the pressure change during the "cleaning cycle" 91-93 ONLY had 3 accumulators in the accumulator housing with 1 being for the line pressure control to dampen the pressure. If it is a 4x4, 91-93 are the only 4x4 4l80e transmissions to have a 40 tooth output speed reluctor wheel.

94+ changed to the 4l60e style EPC, so no more "cleaning cycle", the balance flow oil pressure for the EPC was no longer needed so a vent was put in the valve body, and the line pressure accumulator was blocked. This allowed for more consistent/instant line pressure control since there was no more un needed cycling and no more slowing of the pressure control via the accumulator. And 94+ 4x4 no longer received the output speed sensor reluctor wheel but instead used the one in the transfer case output with a 4 low input to the ECM to tell it when it's in 4 low to correct the output speed sensor readings.