Rear Axle Thrust Angle

[mopowers]

When aligning a rear axle so it's perpendicular with the car, what is generally accepted as the maximum amount of thrust? Would being within 1/8" from side to side at the ends of the axle be acceptable?

 

[TrailBeast]

When aligning a rear axle so it's perpendicular with the car, what is generally accepted as the maximum amount of thrust? Would being within 1/8" from side to side at the ends of the axle be acceptable?

AKA known as centerline thrust.
1/8 should be WAY fine, and they were much farther off than that right out of the box.
Personally I try to pay more attention to weather the car tracks straight, instead of looking like it's going down the road sideways.

 

[mopowers]

AKA known as centerline thrust.
1/8 should be WAY fine, and they were much farther off than that right out of the box.
Personally I try to pay more attention to weather the car tracks straight, instead of looking like it's going down the road sideways.

That's sort of what I was thinking. How much does it need to be off for it to look like it's tracking sideways? I have no frame of reference. Thanks again.

 

[TrailBeast]

That's sort of what I was thinking. How much does it need to be off for it to look like it's tracking sideways? I have no frame of reference. Thanks again.

About the only effective way I know of is to have someone follow the car, or have someone else drive it while you follow and check it.
That said, I don't think 1/8 would even be noticeable.

 

[mopowers]

Me neither. Thank you.

 

[RustyRatRod]

Thrust angle is a comparison of the angles of the center line of the axle to the center line of the vehicle, from front to rear, so the sides of the axle really have nothing to do with it. 1/8" is plenty acceptable for a street car, but of course, like everything else, if you are building a race only badass, you want it as perfect as possible.

Like Greg said though, a LOT of cars are riding around with way more thrust angle than 1//8".

 

[famous bob]

Thrust angle is a comparison of the angles of the center line of the axle to the center line of the vehicle, from front to rear, so the sides of the axle really have nothing to do with it. 1/8" is plenty acceptable for a street car, but of course, like everything else, if you are building a race only badass, you want it as perfect as possible.

Like Greg said though, a LOT of cars are riding around with way more thrust angle than 1//8".

RRR is right. I made mine perfect w/ an 1/8" shim, can`t tell the diff.!

 

[oldkimmer]

Put it on a 4 wheel alignment machine and it will tell u where it is at and if it is acceptable. I had a d60 shortened and welded ends on it and the thrust angle is 0,when checked on the alignment machine. Kim

 

[Abodybomber]

Put it on a 4 wheel alignment machine and it will tell u where it is at and if it is acceptable. I had a d60 shortened and welded ends on it and the thrust angle is 0,when checked on the alignment machine. Kim

Kimmer,someone did it right...

 

[oldkimmer]

He sure did.I was surprised it came out that good as we used ends off of a C body 8.75. Kim