Brake hop no more!

[zlexiss]

A while ago I posted a problem I had during autocrossing. When the brakes were hot, and I hit the brakes hard at the end of a straight, the rear tires would literally hop up and down, often shaking the car hard enough to throw the shifter out of gear.

I ended up talking to Sam Strano on the phone for about a half hour, and after being schooled in a number of subjects from our wierd ABS system to suspensions, he recommended a new torque arm.

I purchased and put on the Random Technologies adjustable arm, and set the pinion angle to -1.5*.

Finally got to autocross it, out in Sierra Vista where the sticky concrete tarmac made the hop that much worse. On a course with lots of hard braking (5 decent straights followed by sharp turns each run), I had zero problems with hop.

-Jeff

[Wicked 3800 V6]

How hard was the install? Is that the one where you need to cut behind the rear seats to snug a few bolts?

Did you previously have the poly bushing in the front of the arm, or just the stock one?

[Dominic]

wow !!! [img]graemlins/thumbsup.gif[/img] [img]graemlins/burnout.gif[/img]

Thats great :D

[zlexiss]

Install took about 2 hours. Random Tech arm uses the stock mounting points. Sam advised me against the ones that bolt into the floor pan, he's seen the sheet metal ripped up pretty severely from the stresses. I had the stock rubber bushing.

I dremeled both clamp halves to get the rubber bushings off.

The new torque arm wouldn't fit onto the diff. It looks like the top and bottom surfaces of the diff where the bolts mount through were never machined clean. Dremeled about 0.040" off the bottom bolt holes, and a half dozen BFH taps later, arm was in place. I had to BFH the old arm off as well, so I don't blame Random Tech for the fit.

Getting the bolt at the top of the clamp threaded was a pain. I guess that's the one reason people might drop the tranny a bit, to get a hand in there better. I had a friend hold the clamp closed with channel locks while I tried to thread the screw in.

Setting the pinion angle took about 15 minutes. Moved the rear jackstands from the body to the axle, and used an angle finder at the trans and diff.

-Jeff

<blockquote>quote:</font><hr>Originally posted by Wicked 3800 V6:
How hard was the install? Is that the one where you need to cut behind the rear seats to snug a few bolts?

Did you previously have the poly bushing in the front of the arm, or just the stock one?<hr></blockquote>