Thread: **HELP** 04 GTP SC shifts but wont drive

Originally Posted by BillBoost37

You feel that's halfway to a rebuild? I've pulled a lot of VB/Channel plates to fix 4th gear hubs and it's quick and easy after the first. Pulling the rest of the stuff apart, replacing seals on the 1st/3rd and 2nd drums was a bit unnerving hoping you got it right w/o being able to see much at all. Then tightening up the clutch packs takes time, now test to make sure things are working. Reassembly and getting the whole sloppy mess back in properly is even more fun. IDK.. I think if he goes in just to channel/valve body he shouldn't swap in his.. but then he can't use the comp g stuff either. Maybe he can sell the comp g parts to TEP or so to get some cash off a VB/Channel plate job.

Lol I should specify. I've never ever been a fan of trying to rebuild or replace transmission parts in the vehicle. It's like doing open heart surgery in a dirty garage or just opening up the oil pan to swap bearings hoping it'll fix the problem. Yeah, it might, but for how long?

That being said, I know desperate times call for desperate measures so I get it.

Personally, I pull the transmission, pressure wash with engine degreaser, drain fluids by dropping the pan, then take it over to a clean metal workbench with a drain pan and a parts washer, inspect and wash everything, replace bearings, rebuild clutch packs, inspect valve body, re-assembly while rebuilding with transmission lube and fluid where needed, load up the torque converter, install everything in the vehicle, fill half the fluids, start the car, then dump the remaining fluid in like a mad man, test drive and top off. Job well done! lol Takes me maybe 5 minutes to tear the transmission down after the channel plat is removed. Everything else is pretty much free once you free the bands.

Heads up on the valve body, I've been sitting on a comp-g valve body, harness, and channel plate off a low mileage transmission and none of my local shops want to buy it for more than $20. Don't bank on making anything on it.

Originally Posted by BillBoost37

I feel like I should call you a cheaper with all that nice stuff at your disposal. I had an engine stand with 4 wheels and a fixture bracket for the trans that I made to do them. If you can't rotate the trans in the right directions.. you really want the correct tools for the job (which I didn't have).

I like to call 4t60/5's a floppy mess that you'd never think would work, right up until the 4th support is in. Keeping in mind these are the only transmissions I have rebuilt, but it amazes me how loose/floppy it is in there until that point.

lol Very true! I hadn't thought about fabricating a bracket for the engine stand! That might be cool to have. My first rebuild I was like "did I miss some bolts or something??" cause I was so terrified by how loose it was. Definitely one of those jobs you hold your breath on the first time. Unfortunately, I checked the valve body for things binding, but not for excessive clearance, so I'm going to have to do that this summer. I think as many rebuilds as I've been doing lately, I might buckle down and get the valve body "air checker" by sonnax which pressurizes the valve body passages so you can see the leak rate or if they're binding.