Transmission experts - need some help
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
Transmission experts - need some help
I changed the trans fluid & filter in my DD 86 Monte Carlo SS over the weekend. I found this in the pan. Any ideas what it was? I don't know much about transmissions, but I've been around this hobby long enough to know it's almost always bad news when you find parts in your trans pan! BTW, its a TH 200-4R.
Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
It the pump housing thrust washer. These are selective washers and thickness is identified by color.
Yours appears to be brown 0.177-0.180
I would suspect you have other problems though. I have seen this one other time.That trans came out of a car that hit a tree dead center. It also destroyed the pump.
Yours appears to be brown 0.177-0.180
I would suspect you have other problems though. I have seen this one other time.That trans came out of a car that hit a tree dead center. It also destroyed the pump.
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
Thanks for the replies guys. The trans seems to work ok (no slipping), but sometimes it shifts late. Also, the fluid was brownish.
What's the fix for this? Can I buy the part that I need? Please don't tell me a tranny rebuild is in my future!
What's the fix for this? Can I buy the part that I need? Please don't tell me a tranny rebuild is in my future!
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
Well, I ordered a tranny kit and the thrust washer. I'd like to think I can just pull the pump, replace the OD clutches and thrust washer and be done with it. Realistically though, plastic fragments are probably all through that transmission and are what's causing it to shift erratically. So I'll probably need to go through the whole thing. Did I mention I've never rebuilt a tranny before? I've got a service manual and some step by step instructions online, so I think I should be ok. Wish me luck!
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Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
Well, I ordered a tranny kit and the thrust washer. I'd like to think I can just pull the pump, replace the OD clutches and thrust washer and be done with it. Realistically though, plastic fragments are probably all through that transmission and are what's causing it to shift erratically. So I'll probably need to go through the whole thing. Did I mention I've never rebuilt a tranny before? I've got a service manual and some step by step instructions online, so I think I should be ok. Wish me luck!
You are looking at pump selective washer [Brown}
http://www.transmissionpartsusa.com/...ers_s/4833.htm
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
The problem is, the kit will not have the selective thrust washer. They have no way of knowing which one you have. SOOOOOOOOOOO here
You are looking at pump selective washer [Brown}
http://www.transmissionpartsusa.com/...ers_s/4833.htm
You are looking at pump selective washer [Brown}
http://www.transmissionpartsusa.com/...ers_s/4833.htm
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
OK guys, my transmission adventure continues... I got the tranny out and torn down today. This is what I found.
The rest on the thrust washer.
Damage to the front of the OD unit and back of the pump.
Also, the splines on the pump stator shaft are pretty worn.
My plan is to rebuild it and get a rebuilt pump with a hardened shaft. Do I need to replace the worn part of the OD unit?
Also, should I consider replacing the converter? I should mention that I don't think the converter has ever locked up in the 6 months I've had this car. Not sure if the problem is in the trans or the converter.
Also one more question since this is my first time rebuilding a tranny. Do I need to go inside the valve body? There are a lot of little parts in there that I'd rather not deal with if I don't have to.
The rest on the thrust washer.
Damage to the front of the OD unit and back of the pump.
Also, the splines on the pump stator shaft are pretty worn.
My plan is to rebuild it and get a rebuilt pump with a hardened shaft. Do I need to replace the worn part of the OD unit?
Also, should I consider replacing the converter? I should mention that I don't think the converter has ever locked up in the 6 months I've had this car. Not sure if the problem is in the trans or the converter.
Also one more question since this is my first time rebuilding a tranny. Do I need to go inside the valve body? There are a lot of little parts in there that I'd rather not deal with if I don't have to.
Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
I hate to say it but.. That overrun clutch housing should be replaced. You really need to go through that trans. Yes replace the convertor. That metal has been every where. You may find more damage. Get yourself a ATSG manual and you can pick up a video on fleabay. This trans is not that difficult.
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
That's what I was planning on. I've already got the ATSG manual and the trans is completely disassembled. It's all new to me and there are a lot of parts, but I think I'll be OK as long as I'm careful and take my time.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You say it's completely disassembled. Valve body, too? That fine metallic debris is a "killer" for tight toleranced body valves. The VB has to be completely torn down, washed, checked out at reassembled. You must have a good written/illustrated guide on how to do that, or you'll be pulling your hair out.
Thread Starter
Instructor
Joined: Aug 2005
Posts: 209
Likes: 8
From: Hollywood FL
You say it's completely disassembled. Valve body, too? That fine metallic debris is a "killer" for tight toleranced body valves. The VB has to be completely torn down, washed, checked out at reassembled. You must have a good written/illustrated guide on how to do that, or you'll be pulling your hair out.
