I know that this topic has been beaten to death and i search a lot,even have done a post like 3 years ago but im still lost with the stupid noise and vibe.So ill get has more precise that i can.

I get kinda lot of noise over 70mph and noise and vibration over 100mph(kinda scary).I probably dont understand how to adjust my TA correctly...

Here are the fact/test:

-Stock TA with stock 10 bolts = no noise,no vibe
-Sphon adj chassis mount TA with stock 10 bolts = noise and vibe
-Spohn adj chassis mount Ta with strange 12 bolts = noise and vibe
-Sphon adj chassis mount TA with strange 12 bolts and new sphon shotgun driveshaft = noise and vibe

I then change the Ta because i hate the clunk noise from the chassis mount Ta.

-UMI full lentgh adj TA with relocation trans brackets with strange 12 bolts and spohn shotgun driveshaft = noise and vibe

So the problem is not the rear end or the DS and u-joint its probably the bad angle that i ve set...Could you help me and give me the basic on this.

Ex:
-If my DS point 1.5 degree down toward the back of the car
-If my diff point 1.5 degree down toward the front of the car(degree took on the flat part of the ta under the pumpkin)

Does this mean that i got a - 3 degree or a 0 degree pinion angle???

Ex 2 :
-If my DS point 2 degree down toward the back of the car
-If my diff point 1 degree down toward the front of the car(degree
took on the flat part of the ta under the pumpkin)

Does this mean that i got a -3 degree or a -1 or a 1 degree pinion angle???

Does the angle from the diff(flat TA parts) needs to be higher than the ds one.(ex: ds is 1 degree down and diff pointing 2 degree down) or it doesnt matter.

Damn could you help me clear this up for me and dont be shy to give me a
couple of example.My goal is to clear all the vibe and the noise to finnally drive the car.

 

Read this.http://www.ssz28.com/tech/Pinionangle.html

 

I ve already read it but thanks.This is why im so cunfused.Let me explain and get constructive

I read on this site and from TA instruction that if you got 2 degree down on the ds and 2 degree down on the diff/pumpkin/flat part of TA and you get 0 degree pinion angle

On this link below if you got 2 degree down on the ds and 2 degree down on the diff/pumpkin/flat part of the TA you got -4 degree pinion angle

I also saw/read that you should take the crank/trans(drivetrain) angle and match it by the opposite with the diff angle(ex: if your crank/trans(drivetrain) is leaning down by 2 degree you diff should point upward 2 degree to achieve 0 degree).Check this link:
http://www.streetissuecustoms.com/pinionangle.html

By the way this way seems logical but doesnt seems to work...

Thanks

 

Make sure pinion is pointed down and set it to -1 degree and your good. It's not that critical. If you have a lot of noise and vibration you might want to look elsewhere.

 

Well if you read my post i ve search for other problem and there nothing else.Even my friend 02ss (nearly new since it doesnt drive it a lot) has some nasty vibe....

 

Well lest continue this(and no i will not stop t ill i get the good result).All my parts are installed including my now working ltcc and i need to get the car dynotune.

My car is dropped with some Stranos springs 1.2 inch(but it look like much more in the1.5inch especially in the front...)

My engin/trans is leaning downward by 2.4 degree \
My driveshaft is leaning upward by 2.4 degree /
My reard end pinion is leaning downward also by 2.4 degree /

If i take this calculation(sphon): DS - rear end
ds: 2.4 minus read end -2.4 i get = 4.8 degree

If i take this calculation(bmr):rear end + DS
Rear end: -2.4 + ds:2.4 i get = 0 degree

The other problem i got here is that my ds is pointing upward toward the rear of the car /

Would it be a good idea to have te engin/trans level at 0 degree?I could probably easily install a shim between the tranny crossmember and the the tranny mount.This way everything would be straight(engin/trans/ probably ds since it would take it back to 0).

Thanks

 

Measure your driveshaft angle, then adjust the TA to point the pinion down 1-3 degrees from that.

Example:
If you were looking at the driveshaft as a straight line through the rearend, angle the front of the pinion down from that straight line.

Later ... Larry S.