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Old 07-25-2011, 01:18 PM   #1
frankenstien
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Default TH350 tranny pan findings

So my tranny pan started leaking, no surprise gaskets don't seem to last long, pulled the pan and there was the usual black stuff on the bottom but in the passenger side forward part of the pan there was some metal filings and 2, 1/4" X 1/4" flat pieces of metal, and I can't for the life of me think of what they would go to, any ideas?

The transmission works and shifts fine, if it matters the tranny is behind a strong 383 and has a full TCI Streetfighter kit in it, the harder of the shift options of the kit, an ATI forged torsional input shaft,
TCI roller clutch race (replaces the one that usually breaks on these) the direct clutch piston has been machined down to fit an extra steel and clutch, when I built it I ran the clutch packs on the tighter side,
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2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

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Old 07-25-2011, 03:24 PM   #2
nate
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Default Re: TH350 tranny pan findings

Broken teeth off the park gear?
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Old 07-25-2011, 03:35 PM   #3
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Default Re: TH350 tranny pan findings

Like off the parking pawl? Hmm maybe, when I check the mail with a full load of water there is about 10,000lbs on the parking Pawl as it's pretty steepish grade, I can't remember where the parking pawl is on it, I don't intend on pulling it, if somthing breaks then I'll know if it's time to replace some parts with stronger ones,
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1974 3/4 ton gmc
450+HP 383

2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig

Last edited by frankenstien; 07-25-2011 at 03:39 PM.
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Old 07-25-2011, 07:46 PM   #4
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Default Re: TH350 tranny pan findings

What the pawl licks into. If you saw how small rhat part is you would NEVER park on a grade/or put a load on it. Use the park brake.
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Old 07-25-2011, 08:12 PM   #5
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Default Re: TH350 tranny pan findings

I thnk ur right, I remember laughing at the park assembly, then I was with my friend when he wAs building his C6 and was like wow mine is ti y compared to that, but I don't have parking break option, I have rear disk breaks and optedfor the less expensive chevy calipers I stead o the cadillac ones, I suppose a line lock would work too....
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450+HP 383

2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig
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Old 07-26-2011, 12:30 PM   #6
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Default Re: TH350 tranny pan findings

Frank.
LineLok, MicoLoc, or driveline brake. All options depending on what you like
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Old 07-27-2011, 11:07 PM   #7
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Default Re: TH350 tranny pan findings

whats a MicoLoc? never herd of it?
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450+HP 383

2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig
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Old 07-29-2011, 01:20 AM   #8
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Default Re: TH350 tranny pan findings

http://www.awdirect.com/lever-lock-m...ake-locks-pto/

I would never trust one of the mentioned above.
You a wheel chock or two every time. The above will give you time to deploy wheel chocks.

good choice for winching though in short sperts.
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Old 07-29-2011, 03:50 AM   #9
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Default Re: TH350 tranny pan findings

hmmmm. so another problem, goteverything back togeather, drove it, no leaks, after hard use, hauling water, get home and its leaking on the right side of the pan....again, ive checked my vent its clear, but i took the bobble off anyways i have the vent run hi into the engine compartment, im starting to think im maybe twisting the body of the transmission enough to not conform with the pan, its in the exact same place as before, im thinking my 30 year old pan is getting tired, any thoughts?
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2005 GMC 2500HD Duramax Diesel- 452hp/962tq on P3's dyno

2015 Ford Expedition EL - Wife's rig
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