differences in 88-98 and 99+ 4l80e?

[LOWnEASY]

Are there any diffrences between the years for a 4l80e? There's one from a 94 or 95 local for $250 and I think my 5 speed took a shit!

[kerrige]

4L80E production started in 1991 and continues today. 1991-1996 cores are essentially the same and interchangeable with some minor updates and differences. The 1991-1993 cores had a poor electrical connector at the pass-through of the case. Many have been updated by now, and if not they would need a new harness anyway. The cores do not have provisions for bolting on a manual lever position switch (MLPS). 1994-1996 cores had an updated EPC (electronic pressure control) solenoid and some have the longer shifter shaft to allow use of the MLPS. All of the 1991-1996 cores have the “old” lubrication circuit design where both cooler lines attach to the case just behind the bellhousing. They also have the larger overdrive roller clutch, typically came with a 16 element instead of a 34 element intermediate sprag, and are of the traditional bellhousing bolt pattern used on SBC and BBC engines.

1997-1999 cores have the “new” lubrication circuit that has one cooler line attaching to the case
just behind the bellhousing, and the return line attaches several inches further to the rear. This was supposed to be an improvement to the lube circuit that “center lubed” the transmission, allowing better lubrication to the rear planetaries. These units still had the traditional bellhousing bolt pattern.

2000-2003 cores are similar to the 1997-1999 cores yet they added a bellhousing bolt position to the 12 o’clock position of the bell for the new LS series engines.

2004-up cores had some slight valve body changes and another EPC change.

We build all year model cores and feel they can all be built and work well. In bigger power applications, we prefer the early larger OD roller clutch setup. The type of lubrication circuit doesn’t seem to be an issue when properly built.

[LOWnEASY]

So, they all bolt up close to the same.
I'm going from 5 speed to 80e what needs done for the PN safety switch? With how to hook it up or bypass it.

[dirt track racer 81]

I have a bone stock 95' I picked up off Craigslist for $250. Only thing it has is a shift kit. Making 800 behind a 370 nitrous motor. I've beat the piss out of it for the past 2 years..

[dirt track racer 81]

I also build the tubular crossmember you'll need for that.

[LOWnEASY]

So there's no way to make the stock cross member work? Forgot to mention its going in a 95 with 4.8 swap

[kewljay223]

Yes. Stock cross member Will work. Just have to scoot it back a few inches.

[LOWnEASY]

Sweet! Now I just have to redo another harness as I deleted all the auto wires from the current one