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Equipment & Gear => Power Equipment & RV => Topic started by: 724wd on February 09, 2016, 09:49:31 PM

Title: cracked trans case
Post by: 724wd on February 09, 2016, 09:49:31 PM: looks like the dowel was stuck when they tried to pull this trans. Anyone ever seen this kind of damage repaired or run a trans in this condition? It was dark when I bought it and it's long past due to do anything about it. It's a K-case 350 and that's the only reason I'm at all interested in options to fix or run.
Title: Re: cracked trans case
Post by: jackelope on February 09, 2016, 10:07:46 PM: I cracked a TH350 case one time like that. Took it to a shop and I'm pretty sure they tig welded it. It worked fine and it got the holy crap beat out of it.
Title: Re: cracked trans case
Post by: Thehowler on February 09, 2016, 10:15:56 PM: Skilled welders repair cylinder heads all the time with different welding techniques. Should not be a problem.
Title: Re: cracked trans case
Post by: Magnum_Willys on February 09, 2016, 11:26:47 PM: Just pulled a similar case out. We had a spare laying around so dumped the guts in that but most radiator shops have a tig guy that can weld it up for you or a marine repair place. Or farm fix - drill a hole at the end of the crack, layer on a bunch of jb weld on both sides and your golden.
Title: Re: cracked trans case
Post by: DRobnsn on February 09, 2016, 11:38:51 PM: I have a BW super t10 that has a welded area about the size of that right around a bolt boss in the bell housing. I've hit that trans with 550 to 650 n20 assisted hp in a 3000lb car with slicks on a vht covered track, no problems so far. Clean up the mating surfaces well, that's what takes the brunt of the force anyway. Unless your running some goofy trans mount I doubt you'll have any issues. Will it have a married t case hanging off of it?
Title: Re: cracked trans case
Post by: biggfish on February 10, 2016, 12:42:20 AM: If the bolts still line up and the crack doesn't run into a mated surface you can weld it. If the bell housing is a bolt on I'd replace it. Driving on it ling term you run the risk of the crack going from minor fix to catastrophic failure.
Title: Re: cracked trans case
Post by: Blacktail Sniper on February 10, 2016, 05:39:34 AM: Quote from: Thehowler on February 09, 2016, 10:15:56 PM
Skilled welders repair cylinder heads all the time with different welding techniques. Should not be a problem.

:yeah:
Title: Re: cracked trans case
Post by: coachcw on February 10, 2016, 06:15:42 AM: stop drill the crack and make sure all the bolts are tight . my guess is you wont have any issues . if your gonna rebuild it have it welded .
Title: Re: cracked trans case
Post by: Sakko300wsm on February 10, 2016, 06:18:52 AM: Looks to be aluminum? If so clean real well, lightly gouge out the crack , drill the end a bit and make sure who ever welds it uses 4043 tig Rod as it is a casting
Good luck
Title: Re: cracked trans case
Post by: Kittman on February 10, 2016, 07:51:46 AM: Quote from: coachcw on February 10, 2016, 06:15:42 AM
stop drill the crack and make sure all the bolts are tight . my guess is you wont have any issues . if your gonna rebuild it have it welded .

This. First thing that came into my mind when I looked at the photograph of the crack.
Title: Re: cracked trans case
Post by: 724wd on February 11, 2016, 11:26:07 AM: Quote from: DRobnsn on February 09, 2016, 11:38:51 PM
I have a BW super t10 that has a welded area about the size of that right around a bolt boss in the bell housing. I've hit that trans with 550 to 650 n20 assisted hp in a 3000lb car with slicks on a vht covered track, no problems so far. Clean up the mating surfaces well, that's what takes the brunt of the force anyway. Unless your running some goofy trans mount I doubt you'll have any issues. Will it have a married t case hanging off of it?

It'll be backed with a Dana 18, and live behind a 4 cyl 153 Chevy.
Title: Re: cracked trans case
Post by: 724wd on February 11, 2016, 11:29:54 AM: Quote from: Kittman on February 10, 2016, 07:51:46 AM
Quote from: coachcw on February 10, 2016, 06:15:42 AM
stop drill the crack and make sure all the bolts are tight . my guess is you wont have any issues . if your gonna rebuild it have it welded .

This. First thing that came into my mind when I looked at the photograph of the crack.

Kinda what I was thinking... and hoping! :chuckle: It will be rebuilt, so I'll look for a local guy that can weld'er up. :tup: Thanks everyone!
Title: Re: cracked trans case
Post by: 724wd on February 13, 2016, 06:58:56 PM: so when you guys are talking about drilling a hole to stop the crack... are we talking 1/8th inch? 1/4? :dunno:
Title: Re: cracked trans case
Post by: JDHasty on February 13, 2016, 07:42:15 PM: Any welding shop can repair it for ~$30 -$50. The local vocational school will probably do it for $15

Don't use it as is, the crack absolutely will propagate
Title: Re: cracked trans case
Post by: JDHasty on February 13, 2016, 07:45:24 PM: Quote from: 724wd on February 13, 2016, 06:58:56 PM
so when you guys are talking about drilling a hole to stop the crack... are we talking 1/8th inch? 1/4? :dunno:

The problem is where does the crack terminate? You don't know is the answer. Just take to a welding shop and have it welded. It is a simple job.
Title: Re: cracked trans case
Post by: HntnFsh on February 13, 2016, 09:15:11 PM: It'll still need to be drilled before they weld it or they might end up chasing the crack.
Title: Re: cracked trans case
Post by: Magnum_Willys on February 13, 2016, 10:08:11 PM: Quote from: 724wd on February 13, 2016, 06:58:56 PM
so when you guys are talking about drilling a hole to stop the crack... are we talking 1/8th inch? 1/4? :dunno:

the size of the hole won't weaken it - larger is better. 1/4 inch would be what I would use just make sure you drill just past where you think the crack ends