Th-350 transmission Whining in Gear

[hurst1979olds]

Well, A couple months ago I had a convert crack on me. While I was waiting for that to come back I decided to upgrade the car to a Fast EZ-EFI. I installed that and the new converter once I got it back from the converter shop. ACC Converters.

I started it up for the first time yesterday and runs great with the EFI. But I noticed when I put it in reverse and drive there is a whining noise coming from the trans. I finally drove it today and everything seems to drive fine. Even when I had my foot in it. But there is a whining noise in first gear without it moving and it does get alittle louder as I start to drive. And is slightly there in 2nd and 3rd. The fluid is topped off. I'm thinking I have a bad pump. What do you guys think?...Id hate to pull the trans back out.

 

[hurst1979olds]

nothing huh? Let me know what some of you guys think could be wrong. What I should do. I did do alittle research. Something I read it says that the converter is pulled too far out of the trannys oil pump. and you can shim it with washers inbetween the converter and flywheel.

But I did have a converter blow up on me....could that have been from too much pressure from the pump and now the pump whines? IDK

 

[othtim]

I dunno man. How bad of a whine is it. I've always had kind of a "whine" but I dunno if I'd really call it a whine...more of just a "stuff is spinning" sound. I've had it since I got my trans put in last year, trans seems to be holding up. My old TH350 had it too. I've never shimmed the converter tho so I cant comment on that.

 

[Oldsmoletick]

nothing huh? Let me know what some of you guys think could be wrong. What I should do. I did do alittle research. Something I read it says that the converter is pulled too far out of the trannys oil pump. and you can shim it with washers inbetween the converter and flywheel.

But I did have a converter blow up on me....could that have been from too much pressure from the pump and now the pump whines? IDK

No clue on the whine, never had one that did that, even behind my quiet exhausted cars, never heard the transmission. As far as shimming goes, don't go too much, you need to leave room for expansion, other wise you will damage your front pump and possibly your new converter. Don't space unless you have to, in other words.

 

[beermonkey9417]

ya sure its not the rear? the reason i say that is because my rear would wine and it sounded like it was comming from the trans, but i was the rear i found out and it looked like this:

go out and try and wiggle yer drive shaft by the pumpkin and if it moves up and down alot, theres yer problem.

 

[chevy2480]

I had a th350 do that for about a yr strAit turned out to be the pump.

 

[joevk78]

Same here, only mine lasted 3 months or so. I had it and it's converter rebuilt, and as soon as we got it back in and started the car, it started whining. It sounded like an engine with a gear drive timing set. It did it at all times, not just in gear, though. Going down the road, my Cutlass sounded like it had a centrifugal supercharger. I was 16 and had no other vehicle, so I had to drive it to work. After about three months of very careful driving (not easy for a 16 year old to do), I was driving to work one morning and heard a pop and a bang, then a loud rumbling noise coming from the trans tunnel. We pulled the trans back out, found a broken flexplate, and took it back to the guy that rebuilt it, who said the pump pretty much exploded. I found that strange, because I drove the car into my grandfather's shop to pull the trans back out. He asked if it made any noises or anything before it went, and my grandfather and I played dumb and said no, so he rebuilt it again and even gave us a new flexplate.