Transmissions and Drivetrain Need help with your trans? Problems with your axle?

GM part #s for hi-perf 700R4?

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Old Oct 21, 2008 | 04:50 AM
  #1  
RPOL98's Avatar
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Joined: Apr 2005
Posts: 286
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From: USA
Car: 90 IROC
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 9-bolt BW
GM part #s for hi-perf 700R4?

anybody know the GM part numbers for the 5-pinion planetaries, HD sun shell, drum, sprag, etc that (I think) are used in the 4L65E (e.g. Escalade etc), that are backwards compatible with the 700R4?

I remember reading somewhere that if you're rebuilding a 700R4 and want to increase its capability, there were some newer GM "hard parts" used in higher-capacity 4L60E's, 4L65E's that are backward compatible. I think these are the same parts sold by some of the aftermarket trans vendors, but was wondering if somebody had the GM part numbers?

Thanks!
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Old Oct 22, 2008 | 04:03 AM
  #2  
Pro Built Automatics's Avatar
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From: Calimesa, California, U.S.
Re: GM part #s for hi-perf 700R4?

I do not know the part numbers, but save your money as the 4 pinion planetaries hold up fine. I use them in all of my nine and ten second builds, and I have never had one break.
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Old Oct 22, 2008 | 02:04 PM
  #3  
brandoz28's Avatar
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From: Iowa
Car: 1987 IROC
Engine: 350 vortec
Transmission: TH350 3500 stall
Axle/Gears: 3.73 10 bolt grenade
Re: GM part #s for hi-perf 700R4?

I usually put 5 pinions in when i rebuild them because i had a 4 pinion one come apart in my car that just has a 305 with tpi on top. not that its a normal thing, but it makes me feel better, and i had to buy one anyway. but anyway I'd just talk to pro built and get everything from there and have it chryo'd and the whole 9 yards it's worth it
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