Author Topic: TH350 Dead  (Read 1105 times)

Offline JohnnyPopper

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Re: TH350 Dead
« Reply #15 on: August 09, 2025, 08:43:54 pm »
Wow Shifty- I should look for the DIY rebuild on YT!

If it's that ubiquitous there are probably many ways I can save $.

Granted, I have never ventured into automatic transmissions, but one can grow facing their fears.

Know a guy who kept worn clutch discs within a certain tolerance, to use them to recreate the standard stack of clutches called for.

His reason was that more clutch surface was better. Sounds reasonable... 8)
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline 1980K20

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Re: TH350 Dead
« Reply #16 on: August 09, 2025, 09:33:38 pm »
Thanks all!  I put it back together, filled it up and drove around the block successfully.  Transmission guy suggested to drive it over on Sunday so there’s less time on the road and i have more time for tow truck just in case.  Good idea.

He’s confident in his ability to rebuild this, as you say very straightforward.  I asked about buying a tci or something.  I got an earful about cheap parts, sometimes good builder sometimes not.  So I’ll have this guy rebuild it.

I’ve got engine oil coming from the converter cover.  Rear seal?  Also some coolant, another surprise.  They’ll correct whatever else is wrong while it’s up.  Probably going to be a month or two.  They have two lifts for classics.  They’ll pull my tranny inbetween other classics.  So i have to wait for a lift to open after it’s rebuilt.

Bought some magnets but my pan is aluminum.  Surprised the drain plug did not have a magnet.  I stacked some magnets on the outside of the drain plug.  May not do much.

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1952 International L112 - waiting for EV conversion
1967 Camaro - 250 six cyl, 200-4R
1980 K20 4x4 Fleetside - 350 SBC roller Cam, TH350

Offline JohnnyPopper

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Re: TH350 Dead
« Reply #17 on: August 10, 2025, 12:57:20 pm »
It's amazing what good circulation does for both animate and inanimate subjects.

If you use the same pan, put one magnet inside the bottom of the pan and an opposing magnet underneath, or outside the pan. 

You can clean them off during the next service/filter change.
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline Captkaos

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Re: TH350 Dead
« Reply #18 on: August 13, 2025, 08:56:29 am »
You can epoxy a magnet in the pan if you want one in there.