I was careful about that, but I missed something else I guess. Here's what I've got. I was going to post more pics as I was putting it back together, but my cam crapped out on me. Anyway, I got everything back together and everything but first gear works great. Reverse is good, second is good and drive is good. If I'm pulling away from a dead stop I have to put it in second for it to move, then back to drive and it good from there. I've pulled the VB and went through it again, resistance checked all the electrical parts inside the VB and everything checks out okay. Any ideas? I'm not above pulling it back out and apart and double checking everything, but some direction would be great. Oh, and a book on the 4R75/4R70 would be great if anyone knows where I can find one. Again, any and all suggestions are greatly appreciated. Thanks again,
J

 

think you may have torn the forward clutch seal loosing pressure in first gear but when chaning to manual 2nd appling other componets to help move it i will try and get some pics as soon as possible but this is what i think happened the forward clutch is the only clutch pack applied in 1st gear

 

Thanks. Next question. Am I going to damage anything else by driving it on a VERY limited basis? Thanks again.

 

Bump?

 

What did you find was the actual issue? This just happened to me yesterday

 

I had the same problem as you I took my transmission apart and nothing broken but my friction plate where very black and had burn makes on all of them you my need to replace all of your clutches

 

have you gotten it fixed yet

 

where was it cracked at

 

My forward drum was cracked/split. Replaced that and a couple of needle bearings I squashed accidentally dropping a drum into the housing and it was good for about 100k. I only pulled it and swapped the trans out a couple of years ago because my overdrive band actuator stopped working. If you seriously take your time and are meticulous about this, it's not impossible. I didn't have a "shop" at the time and did all of this in my driveway and on my patio table. I did end up dropping the transmission/transfer case on my chest and ended up with a bruised sternum, so having a trans jack is a real good idea. I sourced all of my parts from https://www.wittrans.com/ and was very pleased with their customer service and quality parts. If I ever did this again, I'd definitely use them again. I also sourced the factory service manual for the transmission and followed everything, except measuring end play and other things that required a micrometer, though I would suggest using one. If anyone has any questions, ask away and I'll do my best to answer.