I will be finishing my setup hopefully soon and I have a fully built 60e but i dont think she will last long once again. This is my 3rd in the car. I was leaning torwards a th400 reason being the strength and I have a 98' z28 so i would have to buy a stand alone or get a 99pcm. Now i have came across a deal on a 99pcm so i am leaning torward the 80e. I just wanted to know some info on how you guys like the 80e performance wise, what converter, power and times.

 

Subscribing

 

I might have a way to run a 4l80 on a 4l60 tune. I just need to test it first.

 

That would be good. I just got my hands on a 99pcm today!

 

Besides the wiring differences, there are pcm differences regarding the vss. About all a 4l60 tune will do on a 4l80 is 3 rd and reverse i think. You could move a car in a shop, and thats about it. Its painless anyways to just have the 4l80 os system patch done.

 

I don't know how much you're paying for a 99 PCM and the tune it will need to run the 4L80, but I am running one with a Compushift controller. I also needed a Dakota Digital correction box to calibrate the speedo. I am running a Yank SS400 converter.

It's a H/C/bolt-on car and it dynoed at 427 rwhp on a Dynojet when it had a M6. I did dyno it with the A4 on Mustang load dyno with the CC unlocked, but I don't remember the number.

Bottom line is I went from 12.6x with the M6 to 11.62 with the 4L80. My trap speed is about the same 116 mph. Best 60 ft w/ A4 was 1.62 and I think I can do better once I get the launch down and some cooler weather.

 

Might be a dumb question but what is the 4l80 os system patch?
Shevrolayz28 how much was the controller and correction box?

 

It was around $850 for the controller and around $70 for the box.

 

Thats because the Solenoid B operation is exactly opposite of the 4L60E. It detects a fault (the 3-2 solenoid and TCC enable solenoid don't exist) and goes into limp home mode.

This turns off all of the solenoids and puts you in 2nd gear (on a 4L80e, a 4L60e limp is 3rd).

If you disable the codes (P0785, P0740) it shouldn't detect a fault. All of the electrical hardware is the same (some years even share part numbers).

Solenoid A operation is the same on/off sequence. Solenoid B operation is the EXACT OPPOSITE.

In theory (I will be testing it this weekend) if you hook up a 5 pin relay and use the Normally closed pin to ground solenoid B (pin 87a on the relay) it will reverse the operation of solenoid b, making it operate with the same commands as a 4L80E.

 

I know something similar has been done. I found someone controlling a 4T65 (same fwd version of the 4L60/65E) using a 91-93 GM diesel 4L80e controller.

 

Bringing this post back... Did the relay trick work?