ls1adamls1

iTrader: (9)

i got a umi adj chassis mount tq arm for xmas. im going to install it this week, but my question is.......

what is the proper angle i should set the driveshaft?
also in what position does the car need to be in when adjusting?

is there anything else i need to be aware of when installing this?

bigj2717

iTrader: (15)

I have mine set at -1 when the car is at ride height

danhr

iTrader: (18)

car needs to be level

suspension needs to be fully loaded

I like to let the car sit on blocks overnight, to let the suspension "settle"

Check your transmission angle first... sometimes you transmission angle isn't always 0*. I know mine was -1*

I would set it on either -1 to -2 *. If you are a little more extreme, give it more angle. I run mine at -4*

Badazz 97 TA

iTrader: (18)

You set the pinion, not the driveshaft. Take your angle finder put it on the Driveshaft. Write down the number. Put your angle finder on the bottom flat part of the torque arm where it mounts to the rear end. Write down the number.

Add the two numbers together. adjust accordingly


example:
If your DS was at 0* and your rear was at -2* then it would be a -2* pinion angle

0+(-2)= -2



each car can vary so initial numbers may be slightly off. End result you just want to be at around -2 for an automatic car street driven. I forget what manuals should be at

UMI Sales

iTrader: (1)

Hello
Like mentioned above you want the vehicle level. And I usually suggest going with a -2 degrees pinion angle. If you have any questions feel free to ask and I will be more than glad to help!
Thanks
Brad

ls1adamls1

iTrader: (9)

so basically im measuring the pinion angle not the ds angle.

danhr

iTrader: (18)

I believe this to be the wrong way to measure pinion angle. I used this method first, and went through 2 driveshafts... Using the method now, I am launching higher, with more power, on stickier tires, and have yet to break one

Correct. IMHO to be done properly, you driveshaft should not even be in your car

This is the write up I learned from. It isn't f-body specific, but you learn a lot from it. After reading it you will be a pinion angle pro

Linky link

Troy

iTrader: (10)

So, if you have a magnetic angle finder on the flat part of the torque arm mount, and the rear is pointing up towards the driveshaft, sounds like everyone is saying you have a negative number. But if you adjust it and the dial moves to the other side of zero, I now have a positive number?

danhr

iTrader: (18)

backwards. if you transmission is at 0*, and your pinion is pointing up, you have a positive number. if your pinion is pointing down, you have a negative number. Again, I prefer to use the face of the pinion, to get a more accurate reading.

Depending on your setup, you will want anywhere between 0 to -4.5*.

Troy

iTrader: (10)

Oops, mistyped there. Thanks for clarifying about the direction of the angle.

UMI Sales

iTrader: (1)

Yes get the measurement off of the flat part of the mounting bracket on the rear end. And also the DS and make sure that the suspension is loaded while adjusting the angle.
Thanks
Brad

danhr

iTrader: (18)

search is your friend

https://ls1tech.com/forums/gears-axl...ion-angle.html

ls1adamls1

iTrader: (9)

ok so far i have gathered that the angle finder needs to be placed on the flat part of the rear end to get the angle. for the second measurement should it go on the ds or the transmission?

and when im adjusting the tq arm where do i put the angle finder while im adjusting?

UMI Sales

iTrader: (1)

Hello
Put it on the DS not the transmission. And if it is magnetic just let it on one or the other and keep checking both as adjusting.
Brad

OddballLt1

iTrader: (1)

If -2 is the general range for a street car, what's the best for a track only car? Would a more negative number hit the tires harder at the track?

ls1adamls1

iTrader: (9)

ok one more question.......

i got the tq arm on, now on the angle finder which numbers represent + and -?
are the numbers to the left of the 0 + or -?

ls1adamls1

iTrader: (9)

also on the ds loop, which hole do i mount the tq arm? top or bottom?

slammed1500

iTrader: (1)

setting up 4 street and strip 2 diff things
4 strip u are using the pinion angle 2 create lift on the front of the car for wight transfer... madman puts the car at ride height and then put the rearend -2 thats it

4 street i take the angle off the drive shaft and make sure the rearend is -1 from that angle..... -2 for a manual car

every car will be diff. because of the ride height if its lowered and so on
thats y u take the angle off the shaft first


thats the way i do it and its been working good 4 me

UMI Sales

iTrader: (1)

Hello
To tell you the truth it will be easier to explain over the phone rather than typing. So when you have a chance feel free to give me a call and I will be more than glad to help (814) 857-5400. I will be in the office M-F 8am-4:30pm EST.
Thanks Again
Brad

BMR Tech

iTrader: (9)

We have had this question hundreds of times and we decided to develop a video to help show the procedure.

I know you have a UMI torque arm but the procedure would be the same for all manufacturers.