So I went to the track last night to mess around and make some n/a passes. The car has a built 9inch with a sphoon chromoloy driveshaft with the spicer u joints. Also running hoosier qtps leaving at 6500rpm. The car does have the stock tq arm in it still and when I put the 9inch in I think it threw off the pinion angle as a had a slight vibration. I've got about 20 passes or so on it and after 2 passes last night I noticed a pretty substantial vibration at 65mph. I am thinking that the tq arm is bent and really threw off my pinion angle. I hope is not a rearend issue. Also the car doesn't seem to be 60' like it was. Any other opinions are welcome. Iam going to check pinion angle tonight.

 

Your leaving at 6500rpms, and your on a stock torque arm? Man any stock torque arm needs to be thrown in the ocean with the titanic.

 

The stock torque arms are known for bending and flexing under extreme driving conditions, which could easily create the symptoms you are having. I would definitely recommend an aftermarket torque arm with a torque or relocation crossmember.

 

Thanks for the reply. I will definitely be looking into a bmr adj or something similar from one of the sponsors on here.

 

Here is a picture of our torque arm, also in the picture is our relocation brackets and LCA.


The torque arm and cross member is $450 shipped for C/M.

Lower control arms are $225 shipped and relocation brackets are $65 shipped, ours are weld in brackets.

If you have any questions give me a call and I will be glad to help you out.

 

Cool. Yeah I've got the relocation brackets and lcas too.