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Old 03-06-2016, 08:50 PM   #1
JNJchev77
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Location: Mesa, AZ
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Dropmember driveline vibration blues

Specs-
'77 c10
dropmembered front and rear (4-link)
5.3 w/ 4l60e.
Double cardan joint at trans. Trans angle 5* down (recommended for dm setup)
Pinion 2* up (recommended for dm set up)

I have a vibration at about 65mph+, feels like it towards the front of the driveline. Also on deceleration I get a pulsing vibration in the rear.

I'm not really sure where to start. I replaced the rear ujoint and nothing changed. I've also adjusted my pinion angle to see if any position gets better or worse... no noticeable change.

At this point I'm ready to take it to a driveline shop and have them look at it but thought I'd check in here first. Any ideas guys?

Justin
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77' Chevy SB
Dropmembered Front and Rear
5.3/4l60e combo
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Old 03-08-2016, 08:51 AM   #2
PBFAB.COM
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Location: Mesa,Az
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Re: Dropmember driveline vibration blues

Quote:
Originally Posted by JNJchev77 View Post
Specs-
'77 c10
dropmembered front and rear (4-link)
5.3 w/ 4l60e.
Double cardan joint at trans. Trans angle 5* down (recommended for dm setup)
Pinion 2* up (recommended for dm set up)

I have a vibration at about 65mph+, feels like it towards the front of the driveline. Also on deceleration I get a pulsing vibration in the rear.

I'm not really sure where to start. I replaced the rear ujoint and nothing changed. I've also adjusted my pinion angle to see if any position gets better or worse... no noticeable change.

At this point I'm ready to take it to a driveline shop and have them look at it but thought I'd check in here first. Any ideas guys?

Justin


Shoot me an email Justin! I will help you get it dialed in.

Nate@pbfab.com
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Old 03-11-2016, 12:01 PM   #3
JNJchev77
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Join Date: Mar 2010
Location: Mesa, AZ
Posts: 918
Re: Dropmember driveline vibration blues

Quote:
Originally Posted by PBFAB.COM View Post
Shoot me an email Justin! I will help you get it dialed in.

Nate@pbfab.com
Thanks for the help Nate.
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77' Chevy SB
Dropmembered Front and Rear
5.3/4l60e combo
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