Thanks for all the info and help! I have one problem with installing either the 7427 or the 6395 on the 5.7L before the 7.4L, If i do the swap at the same time as I install the manual i dont want to...

So I did some looking and I couldn't find where the 7427 was ever used for 5.7L or 7.4L manual trans. However the 6395 was offered with both the 4l80e and the manual transmission.

Now I have what...

Thanks for the contact, I will give him a call when I get back home around xmas. Also Im not really looking for HP right now just some more torque to move the truck around.



You are right about...

I am replacing my '91 5.7L with a '89 7.4L in my 1991 V3500 with a 16147060 PCM so I am looking for a stock memcal chip to get it running with before i start messing with the 5speed swap. Thanks!

So I will cut to the chase, i found this forum while looking for info on my current project and lurked around for a while. Then i started getting into my drivetrain and decided it was time to start...

I will probably just swap in the setup and see what happens. I have been told that the 16147060 PCM will work with the manual trans but, when it starts throwing error codes it will go into limp mode....

Here is a ECM/PCM question.I have a 1991 Chevy R/V 3500 (4x4 Conversion) and currently it has a 5.7L TBI with a 2wd 4L80e still hooked up so the truck is mobile. This transmission is starting to slip...