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PG Tailshaft Housing - Again

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214 views 1 reply 1 participant last post by  BSouders80  
B
#1 ·
I posted here not long ago about a tail shaft seal leaking on a PG. I got a newer tail shaft housing from ATI and installed that. I took my car to the track on Sat and made a couple of passes.

On the first pass, during the burnout, I'm confident that I felt the vibration that is causing my issues.

I can rule out the DS (I think). I had taken it to a driveline shop on 8/22 and they put it on their machine and checked the balance. They said it checked out perfectly.

I'm not excited about making adjustments, but something is not right.

I have made 4 passes and my car has hooked well off the line. My first pass Sat evening was a 1.29 60'

I'll check whatever needs checked. Please point me in the right directions and I'll report back with what everything measures out.
 
B
#2 ·
My tail shaft seal was not leaking. When I installed the tail shaft housing from ATI, it had a vent at 12 o’clock. I questioned if that should be there, but opted to install with the vent on the housing. Mistake. I do have a catch can for my PG. I believe that the oil that could have went to the catch can, that oil exited through the vent. I had trans oil from the front of the trans, all of the way to the back bumper.

I had ordered ATI’s roller bearing tail shaft housing, so I plugged the vent on it and swapped to the roller housing. Then changed the yoke to the proper size Mark Williams yoke.

It’s all back together now. While at it, I measured my drive shaft angle. 1.1 degrees down towards the back of the car. Pinion measured 5.1 degrees down towards the front of the car.

My opinion is that pinion angle is causing my vibration. I’m going to check the angle at 2.5” separation and see what that looks like. Either way, I’m thinking I’ll adjust the pinion angle up. I’m thinking 2 degrees to a new pinion angle of 3.0 degrees.
 
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