To build or replace?

C.Berry

C.Berry

Bad News
Joined
Aug 10, 2008
Location
Blacksburg, Va
I have linked my vibration to the rear 14sf in the 99 burb, seems the Pinion with tires on the ground has 1/8" bit of play in it. It was a county vehicle for 100k of its life 50k it pulled a 5k landscape trailer so I'm sure it's beat up!! I'm curious if the semi float is worth rebuilding or just find a ff and move on... I do "trail ride":lol: the burb a little with my lady usually just during the fall and when it snows up on mtn lake but this trucks never gonna see bigger than 35-37" tire, surely a 14sf can hold up to that?? Enlighten me further all you smart ones! I know a lil bit more about the 14ff that's why I wanna swap for the comfort of knowing I can tear it apart in 30mins 45 if beers involved. But also don't wanna pay $500 for a 97-98 ff and have to rebuild the damn thing... lol thanks merry Christmas and happy new year!!!
 
I had a similar vibration and it was a bad ujoint. New ujoints and it still had a vibration. Another brand ujoint fixed the problem. I had to take the drive shaft off another suburban to trouble shoot. Anyhow I think your stock rear is heavy enough for the 5.7 and average towing maybe 5k.
 
Hmmm could it be the g80 bomb causing it? I just replaced all 4 driveshaft u joints on the truck last month also... felt it before then but seems worse now especially pulling hills if I hit 3200rpm I start getting it
 
And from dead stop a slow vibration that goes away under under heavy load or high Rpms
 
moldman05 said:
I had a similar vibration and it was a bad ujoint. New ujoints and it still had a vibration. Another brand ujoint fixed the problem. I had to take the drive shaft off another suburban to trouble shoot. Anyhow I think your stock rear is heavy enough for the 5.7 and average towing maybe 5k.
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I've pulled about 9k with it up to 55mph and that lil 350 didn't like it one bit hahaha
IMG_0869.JPG
 
C.Berry said:
Hmmm could it be the g80 bomb causing it? I just replaced all 4 driveshaft u joints on the truck last month also... felt it before then but seems worse now especially pulling hills if I hit 3200rpm I start getting it
Click to expand...

You say all 4 u joints, does it have a center support bearing for the driveshaft?
 
Probably not, but it's got a front driveshaft with two u joints in it :D

He didn't say all 4 joints in the driveshaft, just all four driveshaft u joints.
 
@maulcruiser A Center support bearing as in a carrier bearing for two piece driveshaft? Not on this beaut!
 
I had part in making a carrier bearing for a yota buggy when I first got into this stuff I screwed up somehow with geometry it would only last two trips to mtn city before bearing wire out
 
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