I've seen the BMR video and I'm still not sure on where to adjust my TA angle. If someone could take the readings/pics below and give me some insight, it would be greatly appreciated.


The car is lowered about 2'" all around. Set up for drag racing.
Has a BMR Adjustable TA with a BMR Trans Cross member that takes it off the T56 Trans.

Angle finder on the driveshaft- Dial towards the passenger side of the car.



Angle finder on the bottom of the TA Mount on rear End- Dial towards the passenger side of the car.

 

im guessing the car is front to the left and rear to the right?

Do u have a vibration here?

they way i under stand it u have +4.5 degree of angle u need -2 so i would adjust the rear to 2.5 first and see what it does

my car is lowered and the drive shaft is at 0 and the rear end is at 3

 

If looking at the picture, the front of the car is to the right of the gauge and the rear of the car is to the left.

 

https://ls1tech.com/forums/suspensio...ion-angle.html

this helped me alot

 

Here is our step-by-step video we have on our site.

http://www.bmrsuspension.com/index.c...d=0&videoid=14

 

Thanks. Based on the video and my measurments, what should the TA adjustment be changed too? I have negitive -5 on the DS and -1 on the TA now.

 

When I adjusted mine I measured the angle of my driveline. After installing my poly motor and trans mounts my engine/trans sat at -3 deg. So I set my rearend at 0 deg. At WOT the rearend deflects upward giving me roughly +3 deg. +3 -3 = 0, and no vibration or stress. It seemed to work for me and Im still not sure what measuring your driveshaft does beside giving you a number.

 

For what its worth, I read a suspension article in Hot Rod Mag. last year that stated, no matter what, there should no more then 2 degrees difference between the angle of the transmission and the rear end.

 

If your car is strickly street driven then your transmission tailshaft and pinion should be parallel for the least amount of vibration. Trans pointing down 3 degrees, pinion pointing up 3 degrees. I recently did this to my car and my vibration went away. This will have your front and rear u joint working angles the same and cancel each other out. Anything over .5 of a degree difference will give you vibes(in my opinion). I must have changed my pinion angle 100 times to find the sweet spot. It wasn't until I bought a digital angle finder and set my pinion 3 degrees up since my trans was 3 degrees down that my vibration was gone. I've struggled with this vibration for years until I read that the trans and pinion should be parallel. This is just my opinion but it has worked for me. I know a lot of people use the pinion and driveshaft but its never worked for me.