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How to fix striped trans cross member bolts

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Old Feb 15, 2008 | 09:15 AM
  #1  
Tuttlet's Avatar
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Joined: Jun 2005
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From: Grand Junction, CO
Car: 1987 Iroc Z
Engine: 350 ci.
Transmission: 700R4
How to fix striped trans cross member bolts

I have 2 bolts that are stripped out on the trans cross member brace. they are both on same side. These are the bolts that have a nut welded up in the frame so this is not an easie fix. Please help with out with any tips on the best way to do this before my trans falls out.
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Old Feb 15, 2008 | 10:19 AM
  #2  
scorchmaster's Avatar
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From: Milwaukee, WI
Car: 1984 z28
Engine: BBC
Transmission: TH400
Re: How to fix striped trans cross member bolts

I delt with this problem a while ago for my car. What I did was to drill out the stripped hole and retap it. I did it in my driveway, so it's doable anywhere. I got some huge grade 8 bolts and use those to secure the crossmember. Never have had that problem again. Be sure to use the correct size drill bit, tap and bolts, look it up online if you dont know what matches.
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Old Feb 15, 2008 | 11:52 AM
  #3  
Sonix's Avatar
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: How to fix striped trans cross member bolts

You might be able to go up to 7/16" bolts. I don't think there's meat left for a 3/8" coarse. Mine didn't at least.
I drilled it out then dropped a bolt in from the top and used nuts underneath. It works ok.

I now took some 1/8" plate, drilled holes in them, and welded 3/8"-16 nuts onto it. I'm going to cut a square hole and weld the plate in place of the existing hole.
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Old Feb 15, 2008 | 12:11 PM
  #4  
rjmcgee's Avatar
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From: Klamath Falls Or 97603
Re: How to fix striped trans cross member bolts

When I did my new crossmember I used all 6 existing holes. Some of the originals were getting pretty worn and the other two not used from the factory weren't tapped. 7/16-20 works great. Run the correct sized drill for the 7/16 tap will just cut out the old worn threads. Mine has been great for about 3 years now.
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Old Feb 15, 2008 | 02:27 PM
  #5  
Tuttlet's Avatar
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Joined: Jun 2005
Posts: 38
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From: Grand Junction, CO
Car: 1987 Iroc Z
Engine: 350 ci.
Transmission: 700R4
Re: How to fix striped trans cross member bolts

Thanks for the help guys. Any pics using 6 bolt holes?
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