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

broken mounting tab

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Old Jul 6, 2010 | 08:16 PM
  #1  
jerodo8008's Avatar
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Joined: Jul 2009
Posts: 43
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From: Huron, South Dakota
Car: 1985 Trans Am 1988 Chevy c1500
Engine: 5.7 v8 /4.3 v6
Transmission: 700R4
Axle/Gears: 3.08 & ?
broken mounting tab

ok, attached is a picture of a broken mounting tab on the 700r4 tranny out of my 85 ta that came stock with a 305 carb. I plan on having the engine rebuilt in the future, can something like this just be put off til then? or does one mounting hole really make that much of a difference? I'm just gonna drop a cheap 305 in to get it running again.

it's on the passenger side, third from the bottom.
Attached Thumbnails broken mounting tab-0620001458.jpg  
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Old Jul 14, 2010 | 04:34 PM
  #2  
vasquezmrysvll's Avatar
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15 Year Member
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Joined: Sep 2007
Posts: 640
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From: Northern California
Car: 1985 California Iroc
Engine: HSR ZZ4 0411 swapped
Transmission: 4L60E
Axle/Gears: 3.23 posi
Re: broken mounting tab

im curious as to if any ill effects can be expected.....mine was dropped during rebuild and busted the same tab off. ....subscribed!
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Old Jul 14, 2010 | 04:42 PM
  #3  
duckmanquacker's Avatar
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Joined: Sep 2007
Posts: 568
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From: Leander,TX
Car: 84 Z28 / 88 Trans Am / 87 base
Engine: L69 H.O. / 468 BBC / 2.8 v6
Transmission: 89 700R4 / TH375B / 700R4
Axle/Gears: 3.73 open / 3.23 posi / 3.42 open
Re: broken mounting tab

As long as your not getting on the car hard you should have no effect, However, when you do accelerate hard it will slightly twist the bellhousing possibly binding the input shaft. another option to help that live a little longer is to clean all grease out of the break, drill a couple of holes in the broken area, mix up some JB weld and clamp together till dry. This is an OK fix for a DD but not for a performance build.

Last edited by duckmanquacker; Jul 14, 2010 at 04:47 PM.
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Old Jul 14, 2010 | 07:57 PM
  #4  
jerodo8008's Avatar
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Joined: Jul 2009
Posts: 43
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From: Huron, South Dakota
Car: 1985 Trans Am 1988 Chevy c1500
Engine: 5.7 v8 /4.3 v6
Transmission: 700R4
Axle/Gears: 3.08 & ?
Re: broken mounting tab

Originally Posted by duckmanquacker
As long as your not getting on the car hard you should have no effect, However, when you do accelerate hard it will slightly twist the bellhousing possibly binding the input shaft. another option to help that live a little longer is to clean all grease out of the break, drill a couple of holes in the broken area, mix up some JB weld and clamp together till dry. This is an OK fix for a DD but not for a performance build.
awesome, thanks. like I said I on;ly plan on putting a stock~ish 305 in just so that I can drive it. this winter i'm gonna build up a supercharged 383 and get a new transmission.
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