| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
02-24-2026, 01:06 PM
|
||||
|
||||
TH400 extension housing bushing, driveshaft vibration?
How loose does the TH400 extension housing bushing/yoke fitment have to get to cause driveline vibration? What is the clearance between the yoke and the bushing supposed to be?
I've had a driveline vibration at 65-75 MPH with both the original driveshaft and the aftermarket shaft that's in there now. The yoke has a a few thousandths of slop if I wiggle it up and down in the extension housing. I replaced the seal when I swapped driveshafts, but can't remember if I did the bushing. I pulled the shaft last night in order to drop the trans. The new 1350 yoke has the coating worn off on one side, after 2K miles. It's def been wobbling as it ran. Can I just pound in a new bushing or what else do I need to check? With yoke removed, I can wiggle trans output shaft roughly .040" back and forth. Is that normal?
__________________
I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Threaded Mode