driveshaft phasing help

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Oct 1, 2021 | 01:35 PM

#16

msalander

Thread Starter

Tuned

Joined: May 2020

Posts: 292

Likes: 21

Thanks so much guys. With the driveshaft out and the wheels on the ground, should I be able to turn the pinion yoke at all? Right now I am able to rotate it a few degrees in either direction.

Oct 1, 2021 | 01:50 PM

#17

smle

Fleet Mechanic

Joined: Apr 2014

Posts: 1,790

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From: Oakland, AR

That sounds right.

Oct 1, 2021 | 01:58 PM

#18

redroad

Lead Driver

Joined: Nov 2006

Posts: 5,217

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From: Pa.

Quote:

Originally Posted by msalander

Thanks so much guys. With the driveshaft out and the wheels on the ground, should I be able to turn the pinion yoke at all? Right now I am able to rotate it a few degrees in either direction.

The slop you're having at the pinion yoke is normal for a Truck with a 150.000 miles on it.

Just in case

If you take the two bolts loose from the carrier bearing you can phase the shaft at the slip yoke . Put a jack stand under the rear shaft at about where the slip yoke u-joint is at the carrier bearing height. Now you with the shafts phased you can connect to the back of the T-18 rotating the T-18's yoke with it in neutral to match the drive shaft and you have flexibility in length with the carrier bearing loose. Once your shaft is connected to the T-18 secure the carrier bearing again and your done. A good time to grease anything with grease zerks like u-joints etc. and then your ready for a test drive. Post back with any questions or progress.

Oct 3, 2021 | 02:14 PM

#19

msalander

Thread Starter

Tuned

Joined: May 2020

Posts: 292

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Thanks so much for all your help guys! I don't know if it's "perfect" but my 35 mph shimmy is gone, all u-joints replaced, and I can cruise at highway speeds without much vibration. Don't know what I'd do without this forum to help keep my '77 on the road and my daily driver! Thanks so much again!

Sep 10, 2022 | 12:13 AM

#20

msalander

Thread Starter

Tuned

Joined: May 2020

Posts: 292

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I brought my driveshaft to a pro shop and it's fixed. They had to cut and reweld the slip/coupling yoke in order to get the shaft in phase completely. It cost me $280 and my howl/growl at highway speeds is gone. I got it back today and have had only 1 test drive so far. Thanks for everyone's patience, ideas, and help.