Drive shaft angle doesn’t come into play on a car. If u have a jacked up 4x4 then they sure do. KimThese Driveshaft angles are like talking camshaft grinds with people . . .
Drive shaft angle doesn’t come into play on a car. If u have a jacked up 4x4 then they sure do. KimThese Driveshaft angles are like talking camshaft grinds with people . . .
I never had an issue with mine until I installed a new set of ESPO springs, moved the pinion angle almost 2* negative. I had to install a 2* shim between the spring and the perch to correct it.Ok... So how did that happen? It's a factory 8.75 with espo springs and things 6 leaf springs. I never changes the perches...
I never had an issue with mine until I installed a new set of ESPO springs, moved the pinion angle almost 2* negative. I had to install a 2* shim between the spring and the perch to correct it.
No no no. The pinion needs to be lower than the trans angle by atleast 2.5*. U went the wrong way. Kim
You are lostOk, but if the trans angle doesn't allow that then what?
I thought the bottom line was the trans and pinion need to be parallel? Trans -2.5 and pinion +2.5 ( those would be parallel)
Then roll the pinion down 2*.
I emailed Cass the same thread and he agreed with me, so I'm confused.
Dude have you ever physically measured one? I use a digital meter and believe me they point up, I am not trying to bullshit the OP or you.I have never seen the output shaft on a car or truck point upward (toward the sky).
@plumkrazee70 has it correct. 2 degrees down from parallel may be too much though if the front half of the springs are super stiff. I'd try it with the pinion at parallel and at 1 Deg down from parallel just to see how it runs.
Could also be that the vibration is from the engine and when the OD kicks in, the revs drop and the vibration goes away. Could be in the trans too, but I wouldn't know where to start looking for that.
Dude have you ever physically measured one? I use a digital meter and believe me they point up, I am not trying to bullshit the OP or you.
The ONLY way you are going to make a driveshaft run vibration free is to have offsetting angles that equal 0* that makes it run parallel. The differential has to point down as it will move up as torque is applied to the rear springs, therefore the trans output must point up to offset the downward angle of the diffy. This is not difficult to understand there a dozens of online articles and videos that prove this out.
I agree that the OP has other issues that may be causing his vibration but if the shaft angles are not right is will shake.
I am out, again
Good luck@512Stroker I understand what you're way by, but the trans CANNOT go any higher. Besides, I don't think the driveline CARES whether one is up or down, as long the pinion and trans output are PARALLEL.
I've already talked to Dr. Diff to get his opinion and he verified I was correct. So I think I got my answer
I believe yaI've only measured a few dozen. All of them point down. Intake manifolds are slanted too in order to compensate for the engine and transmission angle... I can't imagine how I could get the trans output to point up, my shifter would hit the floor.