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

Turbo 400

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Old 04-09-2011, 01:59 PM
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sHOW_eM_uR_bIRD's Avatar
 
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Location: $in City, NV
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Car: 1986 Pontiac TransAm
Engine: SB 350
Transmission: Turbo 400
Axle/Gears: Stock Axels with Highway gears...
Turbo 400

I have a Turbo 400; it smokes and it leaks bad. Sometimes it shifts weird if at all. I have swapped out the oil pan, changed the transmission modulator, and I am constantly checking my fluid levels. Bolts seem to vibrate loose and fall out; a lot of bolts are stripped (at least 5 bolts that I've found so far). I've talked to a couple of guys at VegasLSx about the transmission issues and I've been told to swap it back to the 700r4. I really like the transmission and when it's having a good day its awesome. Wondering if you guys had any insight... Thanks in advance for any help.
Old 04-11-2011, 10:27 PM
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Location: Las Vegas
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Car: 90 RS
Engine: 5.0 TBI
Transmission: Slushbox
Axle/Gears: 3.23
Re: Turbo 400

If you have stripped bolts and they continuously vibrate loose you really need to retap the existing holes and use a larger bolt.....this is a very common happening since people use 3/8 ratchets and you retard strength when all you need is a 1/4" ratchet.......

You can also drill out the bad/stripped bolt holes and helicoil them may become a little pricey........
Old 04-12-2011, 03:11 PM
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Join Date: Apr 2011
Location: $in City, NV
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Car: 1986 Pontiac TransAm
Engine: SB 350
Transmission: Turbo 400
Axle/Gears: Stock Axels with Highway gears...
Re: Turbo 400

s'all good brah... thanks for the advise but I'ma get it rebuilt... appreciate it nonetheless... )
Old 04-12-2011, 04:36 PM
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Join Date: Jun 2004
Location: Las Vegas
Posts: 877
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Car: 90 RS
Engine: 5.0 TBI
Transmission: Slushbox
Axle/Gears: 3.23
Re: Turbo 400

Rebuilding the tranny will not repair the problem you have addressed about the leaking/stripped bolts!
Why have a T400 in there anyway it takes a bunch of HP to run a T400.....dont get me wrong they are awesome trannies quite durable but at the same time it kills the rear wheel HP??????????
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