TH200-4R Transmission Issue

[T.Wagner]

So today I replaced my TCC solenoid and 4th gear pressure switch! All went well and it took a little longer than expected and it seems my highway troubles have been solved!

Now, I have another question for you guys... This problem has been going on for a few months and I was hoping a fluid/filter change would help it but it didn't. Every couple of times when I come to a complete stop my car seems to slam down into first gear once I come to a complete stop. It doesn't seem to have any other problems. I saw in my transmission pan some little chunks of metal so I have a feeling I will need to rebuild the transmission soon... But at this point I am just wondering what you think the problem may be with the transmission slamming into first.

Any help is appreciated. Thanks!

 

[DoubleV]

Broken or missing intermediate servo cushion spring is a possibility. I think that's the problem with mine as I too have an annoying clunk on the 2-1 downshift when slowing down.

 

[T.Wagner]

Broken or missing intermediate servo cushion spring is a possibility. I think that's the problem with mine as I too have an annoying clunk on the 2-1 downshift when slowing down.

Thanks! As of today it wasn't too pronounced. I'd describe it as how it feels when you shift the car from neutral to drive. Occasionally there will be a hard shift where the car gets a nice little jolt... but that isn't all to often. My mechanic suggested that it could be the valve body?

 

[oldmansmonte]

Not to highjack your thread but I have the complete opposite problem. I have to come to a COMPLETE stop for the car to downshift to first. It makes rolling stop signs and doing quick stop and go's difficult.

 

[1bad79]

i think second gear starts are caused buy to high tv pressure you might want to check your cable adjustment and may want to check it with a pressure guage there is a lot of good info on 200-4r transmissions on turbo buick forum .com look in their transmission section

 

[oldmansmonte]

i think second gear starts are caused buy to high tv pressure you might want to check your cable adjustment and may want to check it with a pressure guage there is a lot of good info on 200-4r transmissions on turbo buick forum .com look in their transmission section

Thanks man. My tv adjustment has always been slightly less than perfect. I've spent many hours on it. It otherwise operates nicely and i haven't smoked it 3 years later so i must be doing something right.

 

[TexasT]

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Yeah, the 1-2 accumulator spring is kind of a budget piece that breaks. As you can see the plate took some wear too. I hit it with some emory cloth to take down the high spots and sharp edges and put a new spring in.



If you want more info let me know. I took a lot of pix when we overhauled mine.