[centex396]

I just got this kit with upper adjustable trailing arms.
http://www.summitracing.com/search/...del/CUSTOM/?keyword=hotchkis+trailing+arm+kit
Question in my mind. If I adjust the uppers the same length as the stock GM ones will that be OK for initial base set-up?
I wasn't all that great at math in school. Heck I'm from Tx. The instructions are talkin' about something called geometry. Is that some kind of new math?:dontknow:
Anybody ever use this kit? It sure is pretty.:inlove:

 

[464elky]

Change one arm at a time and adjust to where the bolts slide right through. That will leave you at the factory set angle.

 

[mopowa]

Change one arm at a time and adjust to where the bolts slide right through. That will leave you at the factory set angle.

To add to 464 elky's good advise here's some info I found when I did a rear end swap check out the link. The the angles are also important to the u-joints. If the drive shaft and pinion yoke are straight on the u-joints will freeze up over time. Also if your running more power than stock and like to get on the car every now and again you might think about using the non greasable style of u-joints, they're a little stronger.
http://www.iedls.com/asp/admin/getFile.asp?RID=5&TID=28&FN=PDF
Hope this helps, Ang.

 

[fauxrs]

I just got this kit with upper adjustable trailing arms.
http://www.summitracing.com/search/...del/CUSTOM/?keyword=hotchkis+trailing+arm+kit
Question in my mind. If I adjust the uppers the same length as the stock GM ones will that be OK for initial base set-up?
I wasn't all that great at math in school. Heck I'm from Tx. The instructions are talkin' about something called geometry. Is that some kind of new math?:dontknow:
Anybody ever use this kit? It sure is pretty.:inlove:

Yes it will as it would for 90% of users of that kit, adjusting the pinion angle is not something terribly necessary for a street car but can be of great use to a drag racer.

 

[centex396]

Thanks everyone for the info.
Special thanks to mopowa for the link and to 464elky.
This ain't my first rodeo but it is my first rear end.
Once again, members helping members.:You_Rock:

 

[SsUpPoErRt]

I would check my pinion angle with a level, inclinometer or even a smart phone they can be very accurate. Then just adjust it back to the same position. Then adjust left to right to center it between the frame rails. Thats how I set mine. I'll have to check the manual but I think factory is 4deg.

 

[steelybill]

The angle of the pinion needs to be on the same plane as the trans output shaft. It's easy enough with one of those plastic leveler deals with the degree dial. I bought one at Home Depot. A flat spot on the bottom of the tail shaft housing on the trans is a place to find it's angle. The flange on the pinion needs to be 90 degrees from that. Usually + or - 2 degrees is OK.