Torque arms: body mount vs trans mount

[JoeliusZ28]

Can someone school me on the differences on the pro's and con's of each, and more importantly the physics of why those pros/cons exist?

[DETROITMUSCLE]

Well do you want the stress on the trans or on an area of the body that otherwise wasn't "built" for it. I have a tunnel mount and I'm very happy with it but they are noisier as the location puts stress on the body. In the same token I wouldn't ever go to a trans mounted piece either as it puts stress on the tailshaft, I would buy a relocation bracket on a full length as well for adjustability. As far as physics go I would say that a longer lever (aka trans mount t/a) would have more leverage but maybe I'm wrong.

[1BADAIR]

if you ever plan on autocross/roadrace or aggressive braking/cornering dont get a short(body mount). they cause very bad wheel hop under braking
On the other hand a short arm will launch much better at your power

[DETROITMUSCLE]

On the other hand a short arm will launch much better at your power

why is that exactly Larry? and at what power level is a long arm going to launch better?

[meissen]

Body mount makes it nice when you're dropping the engine and trans out.

[1BADAIR]

why is that exactly Larry? and at what power level is a long arm going to launch better?

instant center and the leverge point. not sure how true it is but madman said the very fast cars(like 7-8's) would be better off with a long arm

[prorac1]

I had a Spohn for a long time and loved it. It mounted to the G load brace. IMHO the best arm ever. Worked great. I would NEVER buy an aftermarket arm that mounts to the trans. Again, IMHO, I prefer it mounted solid to the body with a thin piece of rubber between it and the body. It worked great and didnt give off to much noise. Eric L

[JSTALT1]

I have a cross member mounted to each subframe and the torque arm connects to that, I dont get any wheel hop with the car. It makes a lil bit of noise but thats what a loud exhaust is for

[OIF1VET]

I have the Spohn chassis mount and love it.. I would never go back to a trans mount. I always had wheel hop on launch, until I put the chassis mount in.. No more wheelhop.. Just has a much better feel than the trans mount too...

[SlipStreamZ28]

good info guys!!

[JoeliusZ28]

so are ALL body mount torque arms considered short?

[DETROITMUSCLE]

yes, the mounting area is significantly closer to the rear end than the tailshaft. IMO wouldn't the inability to autocross or road race your car with a body mount turn you off? Just my prediction.

[Emulsifide]

I'm surprised nobody has mentioned the transmission crossmember mount. I have this for my car:



All the benefits of getting the arm off of the tailshaft AND the benefit of a full length torque arm.

[WMCCjames]

so are ALL body mount torque arms considered short?

No...I have seen factory full length TA that body mount like the one above. I like the idea of a body mount but hate the idea of adding noise.

[9T8W66]

I'm surprised nobody has mentioned the transmission crossmember mount. I have this for my car:



All the benefits of getting the arm off of the tailshaft AND the benefit of a full length torque arm.

This is the setup I've been looking at for mine