diablizzard

iTrader: (8)

I am running the Stainless Works long tube headers with the Y-pipe and the spohn T56 swap trans Xmember with the remote torque arm. what mods need to be done to the cross member in order for it to clear?

diablizzard

iTrader: (8)

no one has mixed these 2 parts?

InfernalVortex

iTrader: (4)

A new crossmember probably. Those things are HUGE.

diablizzard

iTrader: (8)

I know, I was thinking of selling my setup to get the Hawks mount. But I like the torque arm not being on the transmission. I'm not sure what route I need to take. I would like to do the S&W set up but that would run me about $600.

InfernalVortex

iTrader: (4)

Get a standalone torque arm crossmember. Those T56 mounts put the trans mount two inches farther back from the crossmember mounting bolts, putting the torque arm on that crossmember allows for a potentially huge amount of torque to go into those frame rails where the crossmember mounts, and theyre just not very strong there.

https://www.thirdgen.org/forums/post...862-post6.html

https://www.thirdgen.org/forums/fabr...hn-torque.html

There are alternatives.

I personally use a skulte crossmember, and when I need to relocate teh torque arm I will do so on a standalone crossmember for it, or I will do it jegster style.





He doesnt make these anymore and hasnt for a long time, but its not hard to fabricate something like that.

Tibo

iTrader: (15)

I'm failing to see how locating a torque arm mount to the transmission itself rather than the cross member is a better idea. Those frame rails work better than the transmission does, and a set of inner SFCs (which everyone with a hopped up engine should already have) would keep the frame strong enough. I felt quite a difference after putting my Spohn setup on.

InfernalVortex

iTrader: (4)

It's purely about the location of the force going through the crossmember and the distance that has from the crossmember mounting bolts. With a T56 it's a heavier transmission and all the weight of it is already going through the crossmember 2-3 inches behind the stock crossmember mounting bolts. The frame rail is already being torqued more than usual. Adding a torque arm that is directly hard mounted to it just adds to that stress. If you're running a T5 or a 700r4 I wouldnt even worry about it.

With a factory trans, the stresses of a torque arm, while dampened and absorbed by the rubber mount, the clamshell mount, the trans mount, the engine mounts, and then the crossmember and frame rails, are still not that big of a deal. The torque goes into the trans and assuming ALL of it makes it to the crossmember, it's still pulling up and down DIRECTLY on the crossmember mounting bolts.

With a T56, the trans mount is farther back, and instead of pulling directly on the mounting bolt surface, it actually torques against them just from the weight of the trans. Adding a crossmember directly to the crossmember adds MORE stress to an already bad situation. If you mount it on the tailshaft, there's a lot more parts in the way that dampen and absorb any shock loads, and those are what I would be concerned about.

It isnt about twisting the frame rails in all sorts of directions, they can take that force no problem. Subframe connectors arent even needed for that. It's specifically about that bottom plate of tin foil steel that the crossmember mounts to. Constant shock loads and forces on it, especially torque over 4+ inches away in addition to the weight of a heavier T56 transmission on it (although I've seen it with powerglides too) can potentially lead to trouble.

Im not saying it's "inevitable" or even necessarily probable. It's just possible. If you're going to go this route, at least be aware that this is possible.



From the OP of that picture, it was a bolt on 350 car, did 14 second quarter miles, no rust issues, had some wheel hop issues and they finally traced it to that.

I would get something like this:

http://www.bmrsuspension.com/?page=p...&productid=402

diablizzard

iTrader: (8)

looks like I'll have to get the other crossmember and stock torque arm for the time being, until I can afford the BMR setup. I'll wait til the exhaust is together to see where it meets up. I definitely don't want my subframe to be seperating.