[sprstr1000]

anyone know the factory or best pinion angle on a 04 cobra

[Gary Paul]

Why is it that nowadays everyone's always looking for some kind of an angle?

[Brutal Metal]

Unless your changing the Geometry of the rear axle why are you even asking this question?

[sprstr1000]

im asking this question brcause i just bought the car and it has poly bushings and its having a vibration issue
is that good enough for ya

[sprstr1000]

obviously you two guys dont know the answer an thats why your givin dumbass remarks

[OldSVTGuy]

First of all, you did not provide a lot of information so be careful with your remarks or you will really turn people off. Second, there have been a lot of driveline vibratons associated with higher gears - have you installed gears? You might try rotating your driveshaft 90 degrees. Third, there isn't much you can do with pinion angle unless you have installed aluminum or delrin front differential bushings. The stock bushings have no adjustability unless you use washers to move the front of the differential.

[Brutal Metal]

Originally Posted by oldsvtguy

first of all, you did not provide a lot of information so be careful with your remarks or you will really turn people off. Second, there have been a lot of driveline vibratons associated with higher gears - have you installed gears? You might try rotating your driveshaft 90 degrees. Third, there isn't much you can do with pinion angle unless you have installed aluminum or delrin front differential bushings. The stock bushings have no adjustability unless you use washers to move the front of the differential.

exactly!!!!!!!!

[rj8806]

Originally Posted by sprstr1000

im asking this question brcause i just bought the car and it has poly bushings and its having a vibration issue
is that good enough for ya

Nice attitude...that'll get you alot of help. Try giving as much information about the car/question that you can. That will help whoever is trying to answer you, give better advice.


To answer your question, unless you or someone else changed something in the driveline (other than adding poly bushings), the driveline angles were not compromised. By changing something, I am talking about a transmission(i.e replacing the T5 with a TKO or T56) to something that wasn't in the car to begin with or a rear end housing.

Driveline angles on a passenger car needs to be between 2* and 3*. The tail housing and the pinion yoke need to be equal angles but in opposite planes. In other words a -2* and a +2* or a -3* and a +3* etc....

To check the angles you need to get angle readings from the bottom of the tail housing case (call this A), the middle of the driveshaft tube, call this B and with the pinion yoke turned vertically, get a reading directly off of the pinion yoke, call this one C.

Now take A-B = front u-joint working angle and then take C-B= rear u-joint angle. It is these 2 working angles that determine if you have a vibration or not. They need to be equal but opposite (+2*, -2*, +3* -3*) and cannot vary by more than 1/2*. None of your readings can exceed 5*





Richard
Tech Support
Tremec TKO, T45 & T56 Transmission Systems