TH 350 case and parts reusable or not? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-07-2012, 08:45 PM
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TH 350 case and parts reusable or not?

Can you tell me if this case is still useble or is it just junk. Got it the other day and was going to rebuild it but found these tabs for the retainer ring broken but not in the trans anywhere looked over all the parts and didnt find any thing that looked like the broken tabs. I know the rear steels ans clutches in bad shape. All the other clutches and steels look ok and other parts all look good but the back clutches and steels look bad and the accumulater spring was broke and the little filter in the valve body has blew out screen, What would cause this. Thanks for the Help.
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Old 01-07-2012, 09:05 PM
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the broken spring and filter material blow out are common. Check the accumulator bore for damage from the broken spring

If there are only 2 lugs broke out of the case, I'd reuse the case
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Old 01-07-2012, 09:25 PM
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Thanks for the info Crosley. Greatly appreciated as this is my first tranny and I have a manual but its not very good. Got a differant manual on the way.
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Old 01-08-2012, 12:16 AM
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th350

get "the turbo hydramatic 350 handbook". i used it and the haynes gm transmission manual to rebuild mine. just dont do like me and put 1 too many clutches in a drum thinking the tighter the better. my trans wanted to go forward all the time cuz i made the forward drum too tight. i'd reuse the case if all the bores are clean with no scarring. also check for hairline cracks in the bellhousing, if u catch those inn time they can be fixed by drilling a small hole just ahead of the crack to stop it from spreading then welding it professionally
hope that helps
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Old 01-08-2012, 08:07 AM
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Thanks Gonzo, it all looks good from what I can tell but the reverse clutches and steels look like crap and broken accumalater spring. I will have to get a new retainer ring for the case in the rear because it don't look real good. I found the accumalater spring everywhere on line but cant find that retainer ring spring clip that goes in those lugs in the case.
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Old 01-08-2012, 09:19 AM
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Found all the parts finally. Thanks for all the info guys.
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Old 01-08-2012, 10:10 AM
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This Wiki thread clik here , may provide a few assemble pointers also
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Old 01-08-2012, 12:05 PM
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trans

you should think about having a machine shop shave the low reverse piston so you can add a clutch or two. if they're burned then i would do exactly that, its the hardest working clutch pack in a 350. look into having a machine shop add some holes in the sides of the direct drum and the forward drum, that'll increase coolind to the main clutch packs. the cooler you keep em the better. i reccomend royal purple atf, had nothing but good luck with it. get that turbo 350 handbook, it has so much good info on making a already bulletproof trans even better. i co
uldnt kill mine if i tried
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Old 01-08-2012, 04:06 PM
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Thanks Crosley, I have read a reread that wiki and watched a CD I have on it numerous times, that is the book I got comming gonzo, sposed to be here on tuesday. I got the bushing tools and the spring compressor. I am going to read and get it sunk into my old noodle as my grand daughter calls it. Thanks for all the Help guys.
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