Hi,
I Was wondering if anyone can give any tips for constructing a new transmission tunnel in a race car.
The car is FWD so the tunnel is only for the exhaust pipe. We need to remove the existing tunnel which is too small for the exhaust/oil lines etc which will run down the centre.
We will replace it with one which is larger, and I was wondering if anyone could give some tips on tig welding the new tunnel to the existing floorpan. would one tig weld along the full length of the tunnel (from the firewall to where the floor pan kicks up for the rear seats etc) or would you stitch weld it?
Cheers
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Thread: Transmission Tunnel Construction
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11-25-2012, 01:12 AM #1
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Transmission Tunnel Construction
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11-25-2012, 09:14 AM #2
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I have welded in a few of them. Mig welded soild to keep the fumes out. I suppose you could stitch it and use a sealer. Why tig weld?...Bob
Bob Wright, Grandson of Tee Nee Boat Trailer Founder
Metal Master Fab Salem, Oh 44460
Birthplace of the Silver & Deming Drill
1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
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11-25-2012, 09:32 AM #3
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Transmission Tunnel Construction
We built a pro-street car a few years ago, mig welded, cleaned up the welds then 3M brush able seam sealer then paint. It looked factory and held up to body flex= no cracks.
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11-26-2012, 05:03 PM #4
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I originally wanted to use gig as it was cleaner/neater... would using a tig be a bad idea?
Originally Posted by aametalmaster
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11-26-2012, 06:31 PM #5
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You can use what ever process you want. If it is steel i would use a mig and .024 wire but thats just me speaking. Post some pics when you are done...Bob Originally Posted by Bosco26
I originally wanted to use Tig as it was cleaner/neater... would using a tig be a bad idea?Bob Wright, Grandson of Tee Nee Boat Trailer Founder
Metal Master Fab Salem, Oh 44460
Birthplace of the Silver & Deming Drill
1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
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11-27-2012, 05:16 AM #6
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I think it would depend mainly if it will be structural or not wether to stitch or full weld. A uni-body uses the tunnel for support/strength. Now if the car has it's own frame or cage then it most likely isn't structural. Without pics it is hard to even give an opinion.
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12-25-2012, 08:21 PM #7
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tranny tunnel
make it out of cardboard and duct tape. When you are happy cut out and fab with sheet.
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01-10-2013, 09:13 AM #8
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x2 on the cardboard mockup. I'd seal it up with fully welded seams with a mig. Whats the material?
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01-10-2013, 09:19 AM #9
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x2 on the cardboard mockup. I'd seal it up with fully welded seams with a mig. Whats the material?
MillerMatic 251
CST 280 w/tig torch
HF-251-D1
Cutmaster 42
Victor Journeyman OA
A rockcrawler, er money pit, in progress...
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