Ok ive got the McGaughys 2/4 kit (spindles, shackles, hangers) and i it shimed 2 degrees already. My problem is that i have a vibration from about 60-65 on up. I can feel it in my seat for the most part, sometimes i can feel it through my feet, but im atributing that to bump steer. I had the pinion angle checked out its a 0 currently, the shim took away about 80% of my driveline hum at 21 mph, but this vibration at higher speeds is driving me nuts. Oh yeah i dont think its the wheels because the last set that i had did the same thing. Ive heard some things about transmission spacers (?) helping in situations like this, if any one could help it would be much appreciated.

BTW: last set of wheels 17" this set: 22's. Also is there an optimal pinion angle, i know the angles from the tranny and rear end are supose to be the same, i think

-Dan

 

I have had this problem for a while too....I am told its the output shaft on the tranny or the carrier bearing.

 

Pinion angle at 0*? That sounds a little weird. You realize that there are three angles that you need to know if you want to be sure that everything is okay, right?

 

i had a highway vibration, after installing the 3 degree shim from belltech, with the kit. I removed it, ( so now hangers, shackles...... with no shim) and i have no vibration.

 

ok sorry the angle from the drive shaft to the rear end is at zero, does that sound right? Sorry if im confused im just going off what the shop told me after i had the shim installed. I installed the 2 degree shim and that helped with the low speed hum, but did nothing for the high speed vibrations.

On a positive note though i was able to kill a couple riced out integra's on the way home tonight, made me feel better

 

If there is no difference between the driveshaft angle and the pinion gear angle, you likely have a problem, because there almost certainly is a difference in the forward U-joint (between driveshaft and transmission yoke).

There are three angles you need to know:
(1) The angle of the pinion gear (pinion angle)
(2) The angle of the driveshaft
(3) The angle of the transmission yoke

The most important thing is not that the pinion angle is zero, it is that the pinion angle and tranny angles are the same. If they are the same, then there will be no vibration.

For example, my pinion angle is 7*+ (seven degrees positive), my driveshaft is 2*+, and my tranny yoke is 4*+. So I have to bring my pinion angle down 3* so that it also is at 4*+, same as the tranny yoke. Tough to do with a 4-link, I'm finding.

Anyway, back to your problem. You need all three measurements to ensure you are doing the right thing when shimming. Without all three measurements, you are unlikely to do the right thing when shimming.

Here are a couple of diagrams to help you, let me know if this helps:

 

Here are a couple of articles that may help as well:

Pinion Angle #1

Pinion Angle #2

Pinion Angle #3

 

ok well i appreciate the help Naken AV, since i dont have the means to do the measurements i think ill take it to a driveline shop and have them measure up everything and see what needs to be done from there. Again, thanks for the help.

 

There is also a TSB for replacing the driveshaft and front pinion seal - do a search - we had a discussion about it some time ago - I have not had mine done yet