New Member lookin' for a little Help :-(

[TheJayJay]

Hey everyone, hope the evening finds you all well
I find myself in a bit of a mess, I got an 88 Chevy with what I feel confident identifying as a Turbo 200 transmission in her. Bought her as a dents-n-dings first ride for my son. So far we're both having a blast workin on her, and I know with some work it'll last longer than he will lol

So, we noticed a leak on the transmission, right at the rear seal. So down comes the driveshaft, out comes the old rear seal, and in goes a new. But it's still leaking :-( The thing that's driving me crazy is it looks like the u-joint itself is leaking.
I'm a bit of a novice mechanic, but I'm not afraid to get my hands dirty, and we can afford to tear it down in the driveway. What am I missing?? Any help would be greatly appreciated!

 

[95C1500]

Welcome!

 

[TheJayJay]

Thankya you've got the best avatar pic I've ever seen lol

 

[95C1500]

Thankya!

 

[sewlow]

Welcome! Wish I could help ya out, but not a trans guy.

 

[twomanymontes]

Welcome. As for your issue, remove the driveshaft and look down the center of the yoke. It may have a crack or even a hole. That's why it appears the U-joint is leaking. You will have to replace the yoke and the u-joint in this case.

I have seen this happen in Fords, but not is GM's as of yet.

Hope this helps

 

[supertrucker1978]

The TM200 was never offered in these......or any trucks, and If someone swapped it in I wouldn't worry about replacing the seal. I'd concentrate on getting a new transmission as the 200 was used from 1976-1987 and were not very durable and failed quite often.

 

[TheJayJay]

Thanks for the heads up, guys Yeah, I'm noticing this is gonna be a bit more work than I initially thought >.< Looks like I'll be replacing the yoke soon.. Supertrucker, can you recommend a transmission to swap in?

 

[slippy3002]

700r4 would be the trans of choice if you want to keep the 4spd. Or I would go wiyh a th350 or th400. I am assuming its 2wd.

Sent from my SGH-T989 using Xparent BlueTapatalk 2

 

[TheJayJay]

I'll probably look for the 7r4 then, especially if its a bit less expensive. I dont see this one visiting the interstate much It is indeed a 2wd, standard cab, short bed, though I'm not sure which block is in it. I cant find any identifying tags or marks on the block :-( I'm pretty sure its an older block though, not the factory block that was in it