home made torque arm mount
home made torque arm mount
ive searched for hours and cant find much, so here it is.
i keep breaking trans mounts big surprise right, if its from the torque arm yanking up on it then, what if i was to fab up a solid mount for the torque arm? take the load off the tail shaft, i think if i just solid mount the trans it will break the tail shaft.
dosent seem too hard to do rather than spend big bucks on a kit from summit
has anyone done this? if so do you have pics?
any input would be greatly appreciated i will post pics if i build mine
i keep breaking trans mounts big surprise right, if its from the torque arm yanking up on it then, what if i was to fab up a solid mount for the torque arm? take the load off the tail shaft, i think if i just solid mount the trans it will break the tail shaft.
dosent seem too hard to do rather than spend big bucks on a kit from summit
has anyone done this? if so do you have pics?
any input would be greatly appreciated i will post pics if i build mine
Joined: Aug 2006
Posts: 12,805
Likes: 107
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: home made torque arm mount
pick up a poly trans mount, it will hold up a lot better than stock.
if the car has more power than stock and that why things are breaking, it would be a good idea to relocate the arm from the trans.
one of these
http://www.umiperformance.com/catalo...ex&cPath=6_178
or these
http://www.umiperformance.com/catalo...dex&cPath=6_93
would be a good idea if its a power issue.
or make something like it if you have the ability
if the car has more power than stock and that why things are breaking, it would be a good idea to relocate the arm from the trans.
one of these
http://www.umiperformance.com/catalo...ex&cPath=6_178
or these
http://www.umiperformance.com/catalo...dex&cPath=6_93
would be a good idea if its a power issue.
or make something like it if you have the ability
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Joined: Jul 1999
Posts: 17,265
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: home made torque arm mount
You can fabricate something to move the torque arm off the transmission but the factory torque arm is flimsy and flexes a lot anyway and isn't the best choice to use. That's why a lot of TGO members have converted to an aftermarket torque arm. They're adjustable for the pinion angle and the front mount is moved onto a new tranny crossmember.
You can't "solid" mount the front of the torque arm. It needs to move forward and backwards as the diff rotates through it's arc. If the front mount is solid, the diff will bind. All the good aftermarket torque arms have some sort of floating front mount. The early Spohn design www.spohn.net was a simple slip joint. He now uses a shackle.
You can't "solid" mount the front of the torque arm. It needs to move forward and backwards as the diff rotates through it's arc. If the front mount is solid, the diff will bind. All the good aftermarket torque arms have some sort of floating front mount. The early Spohn design www.spohn.net was a simple slip joint. He now uses a shackle.
Re: home made torque arm mount
wow cant believe ive been a member for almost a year and this is my first post.
i know about the weak arm but im laid off so i have to do this cheaply for now. ive got some plate and tubing i should be able to come up with something. might just beef up the arm some while im there, thanks for the help folks
i know about the weak arm but im laid off so i have to do this cheaply for now. ive got some plate and tubing i should be able to come up with something. might just beef up the arm some while im there, thanks for the help folks
Re: home made torque arm mount
well here it is dont hate its a first attempt and i have another cross member it seems pretty good, it did move the pinion angle down a bit but no adverse effects


sorry crappy cell phone pics


sorry crappy cell phone pics
Last edited by jasonrski; Jul 23, 2009 at 03:10 PM.
Senior Member
iTrader: (1)
Joined: Jun 2001
Posts: 656
Likes: 0
From: Nashville, TN
Car: 91 Z28
Engine: Lt1
Transmission: T56
Axle/Gears: 3.70 auburn pro 9"
Re: home made torque arm mount
Sorry bud, but thats full of fail. The stamped stock cross memeber has almost no torsional rigidity.. itll twist that up in a hurry. Do no run that! start from scratch with some square tubing. take a good look at some of the manufactures like BMR and Spohn.
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Member
Joined: Sep 2007
Posts: 169
Likes: 0
From: Baltimore
Car: '82 Z-28
Engine: 355
Transmission: TH-400, 8" ATI MRT
Axle/Gears: Moser 9", 4.56's
Re: home made torque arm mount
i would use that one you have to make sure it will work, then take that spare cross member and reinforce the sh*t out of it; fill in all of the holes with some 1/8" plate...or you could make a new one out of some steel tubing and just use your idea for measurements (i would lean toward this option). just use your head and try to make it as strong as possible so you dont have more problems. if you can post up some better pics; it might help us see what you've got going on and maybe we can provide some suggestions.
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