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Post by stalkn on May 1, 2024 11:15:24 GMT 12
Hey team, my Mazda OEM mounting has 2 x m10 studs coming from lugs on the tunnel. New mount for gearbox is forward of these studs, so my fabricator has utilized the 2 m10 studs and added wings to the crossmember that mount further forward via sandwich plates through the tunnel floor. He has had these pass in the past / same make model / same gearbox etc. My question is can I drill & tap OR Tig "weld nuts" to these sandwich plates so I can undo bolts from beneath the car. ? Rather than current set up of nut and bolt through the sandwich plate / tunnel and mount. This would prevent me from having to remove carpet to hold bolt head when doing a gearbox or clutch change.  |
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Post by stalkn on May 1, 2024 11:16:17 GMT 12
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Post by Chris on May 2, 2024 7:59:23 GMT 12
Hey team, my Mazda OEM mounting has 2 x m10 studs coming from lugs on the tunnel. New mount for gearbox is forward of these studs, so my fabricator has utilized the 2 m10 studs and added wings to the crossmember that mount further forward via sandwich plates through the tunnel floor. He has had these pass in the past / same make model / same gearbox etc. My question is can I drill & tap OR Tig "weld nuts" to these sandwich plates so I can undo bolts from beneath the car. ? Rather than current set up of nut and bolt through the sandwich plate / tunnel and mount. This would prevent me from having to remove carpet to hold bolt head when doing a gearbox or clutch change. Nothing preventing you from tacking a couple of welds to hold the nut to the plate to prevent it from turning, but don't fully weld the nut to the plate because if the nut is high tensile, the heating of the nut can affect the high tensile properties. Double check with your certifier regarding the suitability of using doubler plates for a gearbox crossmember mount. They may want to see it to check suitability and it might be OK, but I would check before you fully commit. Cheers Chris |
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Post by stalkn on May 2, 2024 14:04:20 GMT 12
Hey team, my Mazda OEM mounting has 2 x m10 studs coming from lugs on the tunnel. New mount for gearbox is forward of these studs, so my fabricator has utilized the 2 m10 studs and added wings to the crossmember that mount further forward via sandwich plates through the tunnel floor. He has had these pass in the past / same make model / same gearbox etc. My question is can I drill & tap OR Tig "weld nuts" to these sandwich plates so I can undo bolts from beneath the car. ? Rather than current set up of nut and bolt through the sandwich plate / tunnel and mount. This would prevent me from having to remove carpet to hold bolt head when doing a gearbox or clutch change. Nothing preventing you from tacking a couple of welds to hold the but to the plate to prevent it from turning, but don't fully weld the nut to the plate because if the nut is high tensile, the heating of the nut can affect the high tensile properties. Double check with your certifier regarding the suitability of using doubler plates for a gearbox crossmember mount. They may want to see it to check suitability and it might be OK, but I would check before you fully commit. Cheers Chris Thanks for the reply Chris. I should have specified I plan to use proper Weld Nuts - as in plain steel not zinc coated etc. As far as design goes Certifier has passed similar in the past with non captive nut & bolt.i just don't want to have to pull carpet out in the future 😉 The wings to the tunnel are really only only there to supplement the oem points againest twist.( Certifiers idea not ours ) |
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