I can tell that it was under hard braking that you broke it based on the down ward shearing of the trans tail housing. Do you experence a bit of wheel hop under hard braking? The shock load when that happens leads to this type of failure. The factory bracket is stamped steel that does not distribure the loads evenly to the mounting bolts, major problem. That mount in the picture was a early experiment dealing with the same issue, finally went with A BMR so that I could adjust the axel center with the lower body height (nice feature) took care of my problem, would highly recommend.

 

I believe the breakage is more commonly from the
driveshaft whipping (stock steel 'shaft reused after
gear swaps, especially) than the TA load.

I like the look of that clamshell and always wanted
to see somebody make something like that, but
that mounted sandwich style between the trans
and trans tail mount to get the stout base but
use the trans mass to soak up the vibration. To
have it strap the tailhousing too, is fine, but making
the torque-return path go right to the tail mount
is even better in my view.

Something like this would be the answer for all us
weekend warrior, still want a smooth ride types
who can't stand the downside of the crossmember
mounts.

 

Wouldnt the simple solution be a chassis mounted t-arm? Or are there any major perks to the full length t-arm that Im not aware of?

 

broke mine twice on a dyno

 

third pull on the dyno mine took a crap on me. I still have the steel drive shaft as well as a prothane tranny mount and motor mounts. I had a vibe at 55mph and higher it got worse with the speed but i thought it was just the stiff mounts. I broke my tail shaft i dont think it was all the TQ arm but a mixture of that and the steel shaft. i replaced the tail shaft housing and put the stock mount back on no viberations I think imma try a alum drive shaft and that BMR relocated TQ arm mount abouve

 

Hmm seems to be a lot of these things breaking on the dynos..... Was the front of your cars strapped down resticting the front from raising at all when they broke?

 

Mine broke on a little freeway run. After I left off and was coasting boom! I have a Spohn T/A now and haven't had any issues ever since.

 

Dang man thats scary stuff. I couldnt imagin doing any speed getting trans fluid dumped all over the tires....

 

That looks sweet, I'd run one.

 

mine just broke last Friday. ORY-Catback and Lid w/ 315s was all it took. Car was launching great with the 315s then BANG!

 

Your sig says your car is an M6. Did you break the tail housing on the T56?!?

 

Yeah - I've had a long battle with rear wheel brake hop. In fact, my car has/had it more than most people. I've finally got it dialed out and/or under control with an Unbalanced Engineering TA, split-rate shocks, custom rod-ended control arms, heavier rate springs, brake bias (less rear pad) and lowered rear.

 

The unblanced eng TA is the way to go. Do you drive it on the street? and do you get much clunking going from brake to the gas hard

 

Sorry - my car is road-race only. In fact, I have a race version of the arm. Difference is that my tunnel mount ties directly into my cage, instead of bolting to the floor of the car.

As far as its effectiveness, it's a very good modification. I get very predictable results with it, now that it's properly setup. The brake hop is almost non-existant (though I'm not sure anything is completely eliminate it). At the end of the day, I'm usually in the top 3 and fighting for position. That's good enough for me!

 

Great! keep at it, I raced a old TR4A in SCCA back in the day. I miss road racing, it was the best!

 

yup, ripped the top bolt right out of the tail housing.

 

yes my car was strapped down in the front when it was on the DYNO 3rd pull was all she wrote

 

With the body mounted torque arm do you get harmonics or more vibration through the interior of the car?

I just got done fighting with a poly trans mount that was causing horrendous harmonics.

 

gotta get rid of that steel drive shaft

 

Dumbest advise I've heard in a long time.