TH350 Question if anyone knows

[1977K10]

Last week my TH350 3-sp transmission gave indication that the forward gears gave out, but I still have reverse, I am wondering if its just the torque converter that has problems. I am going to be taking out my tranny this week to repair it, even if it means to get one from the junkyard and a rebuild kit from LMC in order to tear it down and rebuild it to like new. Any ideas would be great before I call the transmission shop, and have them rebuilt the parts I send them.

Thanks Shawn

[deth_1970]

a torque convertor would not cause a no forward problem, it is probably the forward clutch pack, or low/reverse clutches, you can get rebuild kits at napa, advance auto, the problem is inside the trans,

have you ever rebuilt a trans???

[1977K10]

Not in a truck, but i have rebuilt a few when I was doing automotive at Warren Tech school .
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[deth_1970]

ok, same thing as any other 350, just take it slow, and lay it out in order it came out in, do one clutch pack at a time,
and don't trust your eyes, if your eyes pick up on something, feel it with your hands,

[monte0185]

Unless you just want to do it yourself its just about as cheap to drop it at a shop and let them build it. its about 400$ around here for one and usually they have a couple sitting on the shelf and will just swap out with you.

[Mrknowitall]

400bucks!? Here n cali all quotes are 1000 and up. Its a mess to do urself theres alot of utube vids that explain it but id buy a book and try it urself, or take ur chances on a junk yard trans for 200???
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[1977K10]

Originally Posted by deth_1970

ok, same thing as any other 350, just take it slow, and lay it out in order it came out in, do one clutch pack at a time,
and don't trust your eyes, if your eyes pick up on something, feel it with your hands,

Oh, yea, even though I have great eyesight, I still feel the work that I am working with in case my eyes missed a wear pattern or something, I can feel the imperfections of the metal or other material.

[1977K10]

OH YES, that was stepone, =get an overhaul manual so that way I hade a more clear idea what I was doing, and that would give me a good reference point as to what is the correct thickness of things and what not.

[1977K10]

I took my transmission pan off today, and cleaned it off so I could see what all was in it.
I found what appears to me to be either spacers or some kind of composite material.
the stuff at the top of the picture was a transmission gasket sealant to try to stop the leaking...
didn't work.

[deth_1970]

I build stock rebuilds for 400-500 here, then if you want more, it'll cost more, alot depends on what your motor has in it, stock motor, a stock build would work,

that stuff in the pan, looks bad, ate up a thrush washer by the looks of it, or burned up some clutches, you would want a master rebuild kit, with bushings and thrush washers, the thrush washers are selective, meaning that they have different thicknesses for end play, a local book store should have, or have access to ordering a good book to do the rebuild

[1977K10]

I dont doubt it, when i first seen it, it reminded me of broken shale rock.
although a master rebuild kit don't sound to bad.

If it's worth doing, do it right the first time.
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[deth_1970]

http://www.transmissioncenter.com/Pe...H350_TH400.htm

this is where I get most of my trans parts from, they have great customer service, if you call, talk to Nathan, they have books, videos and knowledgeable people there

[1977K10]

ok, I'll check them out, thanks

[beamn7]

I would also recommend a book from Automatic Transmission Service Group:http://atsg.biz/ They make great step by step manuals.
Also, having built my fair share of trannys when working at the dealer level, I NEVER put RTV / Silicone on the trans pan as seen in the picture you posted....

[1977K10]

Yea, I asked the auto parts place about stopping leaks around the transmission pan, and they referred me to this type of squeeze in sealant that is like a silicon type of gasket, and it didn't work.
When I remove my tranny this week I will be looking for case cracks or anything that may have allowed the fluid to leak out.
I looked at the detent cable entry, and the dipstick tube inlet, and around the pan where I seen drops of fluid, although I hadn't located it.
Going to do it right this time.

[1977K10]

I thank everyone for their feedback on this posting..
the new posting will start out with the start of the rebuild process.
As I go along on my trip around the transmission, I'll post pics and comments
as I get things taken apart and rebuilt.

I have checked out the great links and information that everyone sent, and I thank you, it helped me in making a good decision on a small budget and get things back in working order.