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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: Koldsimer on April 10, 2014, 02:32:59 pm

Title: 1 bolt in crossmember/trans mount- handle big torque?
Post by: Koldsimer on April 10, 2014, 02:32:59 pm

Hello all. I have been a long time lurker on this site and it has proven extremely useful over the years. I have a few questions on a 85 gmc that I am restoring. It has a 496 that dynoed at 580 ft/lbs and I'm concerned that the one bolt in the trans mount is not sufficient for the torque/traction I have. Any thought or ides? Should I drill the crossmember to accommodate the two outer mount holes or is one bolt sufficient? Thanks!

Title: Re: 1 bolt in crossmember/trans mount- handle big torque?
Post by: bake74 on April 10, 2014, 08:22:48 pm

     In this circumstance a "picture is worth a thousand words", can you snap a pic, are you saying there is 1 bolt on the bottom of the transmission mount where the rubber bushing is between the transmission and the transmission mount ?

Title: Re: 1 bolt in crossmember/trans mount- handle big torque?
Post by: Captkaos on April 15, 2014, 08:32:23 pm

I am assuming that you mean the singe bolt in the transmission mount like the one below.  It isn't "holding" anything other than keeping it from walking up and down/side to side.  Mine was dyno'd at 500lb/ft at the rear tires, it will be perfectly fine.

(http://www.73-87chevytrucks.com/projects/87R10-Driver/trans_mod2.jpg)
(http://www.73-87chevytrucks.com/projects/87R10-Driver/trans_done.jpg)
(http://www.73-87chevytrucks.com/projects/87R10-Driver/R10drvr_202.jpg)