1995 GMC 4L60e to 4L80e Swap Help!

[GMCYukonDriver]

You won't need the HDR1 since you already had a tuner burn a chip for you (I'm assuming that they used a G1 adapter along with a stock MEMCAL). The HDR1 is just to read a STOCK MEMCAL. What you'll do is remove the chip your tuner provided from the adapter and put it into the Burn2. Your '95 didn't have the 2732A chip, that's for the '7747 style systems.

Can you post a photo of what your tuner provided you? It'll be easier to help you with the specifics then.

The only thing I was sent was a Memcal.

Exactly like this:





I don't really want to mess with his chip. If I'm going to be burning my own tunes, then I would rather just send it back and get my money back. I paid far too much to get tunes that don't work, and then have to go through the time and expense of buying and learning the things I need to burn my own.

I have 2 more Memcals. One is a Whipple chip that came with the setup. Another is from Z-Industries, from years ago. It's probably almost as old as the truck. I would rather be able to erase the PROM on those and then burn the BJDR .bin file onto them. I already loaded that .bin onto TunerPro and took a look at the tables, just to make sure it would actually control the 4L80e.

I have no idea what .bin file is on the chip that the tuner sent me.

Thanks for all the help. I've been reading all day and my mind is just about done by now. I think I'll call it a day and tackle some more reading and research tomorrow. In the mean time, any tips or ideas would be very much appreciated. Thanks guys! Very helpful forum you've got here.

[GMCYukonDriver]

Finally got it working. Not sure if it was wiring that wasn't making contact, or maybe the computer just needed time to re-learn the new tune.

First, it was a 4L60e tune he sent me by accident. The next one was still limp mode, but was for 4L80e. I was driving it to a mechanic's shop the other day to see what his scanner could find, and on the way there, it started shifting. It's been driving normally ever since. Thanks for the help, guys. I appreciate it. Not sure what caused it to start working, but if it ain't broke, I'm not gonna try and fix it.

[fastacton]

That's good to hear! Maybe something had gotten stuck in the valve body and a little more driving is what it needed to get everything working properly.