[dannydoo]

How much pinion angle will a doublecardan joint make up for in the rear?

IM having a problem setting my pinion angle with only being able to move the tranny up/down..The driveshaft specialist put a double cardan on and IM still getting vibrations up top 80mph verry bad when i piish the clutch in..
But as soon as I let the clutch out a tiny bit and put some torque on everything it goes away immeditly.

It sounds like a super severe backlash problem or a super bad u joint.Def coming from the rear half.

Is it like the front angle can be off alot and so can the rear if you use a double cv cardan joint? Or does it still need to be set to a certian degree?


Btw IM in a 95,I did an aode to tko 500 swap,IM using a d/s spacer and had te d/s balanced and the cardans on it .It made a huge improvement from 0-65mph but up top is horrid and worse

[lxarlo]

1. i dont like the idea of a driveshaft spacer. that could be the culprit.
2. what gears are you running, and with a steel driveshaft?
3. do you still have the vibration dampner on the differential housing?
4. check your harmonic balancer.

[dannydoo]

its got an sfi balancer brand new

its got the rear dogbone still on

the d/s was balanced and the joints are new

the gears are 410


it didnt make a peep with my auto tranny...i pulled the auto and put the tko and vibes from hell...

i know the angles are all off cause i have poly motor mounts which are like 1/2 inch =1 inch higher

i have poly trans mount also

the pinion wasnt happy

This double cardan prop shaft is suppose to let you run crazy angles and not have to worry.
I thought maybe u couldnt use a single and a double...but ive seen driveshafts all over the net by specciazlsts like this

my problem now is...
I only get vibes after 80mph and only when i let off the gas....

in 5th gear doing 80 i push the cluth./.it vibes....i let the clutch out alil and the vibe stops.....i push it in it comes back...im still cruising..

Now im at 70-65 it dont vibrate anymore clutch in or out......hmmmm

Im thinking its the backlash or maybe the pinino is still just a little too high?????