Recent content by bcox11

Well, I’ve done to swap from 3l80 to 4l80e. But, I keep having issues with the TCU. I ordered the TCI kit as many of you have, but it isn’t working. It was showing that I was in 2nd gear at all times. Found out that the computer wasn’t sending 12v to the transmission. I got a replacement kit. I...

In regard to quick and saving money, I hesitated saying that. Was trying to be honest. I completely understand that there is nothing quick or cheap about HMMWV’s. Normally, I wouldn’t care about time or money, but at the moment my wife and I are buying a house and I’ve already had to come up...

BLK HMMWV, thanks for the post. I have a 24 volt alternator at 60 amps. As for the TCU, I am not set on either at the moment. I guess that the deciding factor is money and timeframe. The HMMWV is my daily driver, so I need it fixed quickly, but also need to save money. As for the shifter, I...

Dayron84, thank you for the link. I am currently going thru the post and trying to pick out the transmission sections.

Let me start by apologizing if this subject has already been posted before. I bought an ‘89 M998 in September. I had a 6.5L NA engine, 3L80 Trans, and a 242 T/C. Everything has been fine with it until a few days ago. Started having trouble shifting up. Also, it was downshifting. I drained the...