u-joints

sdbgsmith · 10-11-2008, 06:10 PM

I have a 2003 silverado ext cab had to change u-joint on back shaft now i have a shake at 30-35mph any idea,s on what it may be and how to fix it,,,,thanks

JOHN JAY · 10-11-2008, 07:51 PM

Are you sure that the new u joint is lined up correctly in the pinch bolts? other then that the drive line is balanced and you may have rotated it 180 degrees?

leolkfrm · 10-11-2008, 09:21 PM

did you press the joint with a press? if you did it with a hammer in a vise you probably bent the shaft. You have to be very careful with the new aluminum driveshafts

93blazer · 10-11-2008, 09:23 PM

man i hate changin factory u joints on chevys they have that teflon junk in there and its a pain if you dont have heat to put on it

gmctrucks · 10-11-2008, 09:30 PM

Quote:

Originally Posted by 93blazer

man i hate changin factory u joints on chevys they have that teflon junk in there and its a pain if you dont have heat to put on it

I agree with you I bought this tool that it has different sizes of adapters so that you have a choice to use it on different cars/trucks in fact I haven't even used it but it's there when I need it oh one uses an impact to press them out it's a lot easier.

75K30 · 10-12-2008, 02:32 AM

Please verify that the shaft is till in "phase". Even one spline off will throw the shaft out of balance.
If it is a one piece shaft and phase cant be messed up, then make sure that the slip yoke is lubed properly. Even automatic transmissions require a little grease on the splines.

75K30 · 10-12-2008, 02:34 AM

Totally forgot,...make sure that you have not overtightened the u-joints. Too tight and the bearing becomes a bushing, and this is not very good.

animalsrule · 10-12-2008, 02:43 PM

my experience has always been another u-joint but these guys know a lot more than i do..little s10- had all the u-joints replaced in it at least 2 times for all 3 and 1 time for one of them

if there is a grease fitting make sure to keep them greased..that helps a lot also

barbermike34 · 10-12-2008, 03:38 PM

just took the back u joint out of my truck it had the shakes and the skweaks did have supervision mine fell into pieces on removel wasent that bad but pressing it back in the yolk and linning it back up was very important i was told.no more vibration or skweaks good luck

gmctrucks · 10-17-2008, 11:01 AM

Look what I found.

YouTube - Replacing a Rear Axle U Joint : How to Inspect U Joints

10-11-2008, 06:10 PM	#1
sdbgsmith Junior Member Join Date: Oct 2008 Location: northeast ohio Posts: 1	u-joints I have a 2003 silverado ext cab had to change u-joint on back shaft now i have a shake at 30-35mph any idea,s on what it may be and how to fix it,,,,thanks

10-11-2008, 09:21 PM	#3
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,903	did you press the joint with a press? if you did it with a hammer in a vise you probably bent the shaft. You have to be very careful with the new aluminum driveshafts __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

10-11-2008, 09:23 PM	#4
93blazer Senior Member Join Date: Oct 2008 Location: south BAMA Posts: 284	man i hate changin factory u joints on chevys they have that teflon junk in there and its a pain if you dont have heat to put on it __________________ IF YOU AIN'T FIRST YOUR LAST SHAKE AND BAKE !!!!!!!!

10-12-2008, 02:43 PM	#8
animalsrule Senior Member Join Date: Aug 2008 Location: Kentucky Posts: 307	my experience has always been another u-joint but these guys know a lot more than i do..little s10- had all the u-joints replaced in it at least 2 times for all 3 and 1 time for one of them if there is a grease fitting make sure to keep them greased..that helps a lot also __________________ looks are cosmetic.....its whats under the hood that counts

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10-11-2008, 07:51 PM	#2
JOHN JAY Senior Member Join Date: Sep 2008 Posts: 196	Are you sure that the new u joint is lined up correctly in the pinch bolts? other then that the drive line is balanced and you may have rotated it 180 degrees?

10-12-2008, 02:32 AM	#6
75K30 Senior Member Join Date: Jul 2006 Posts: 3,308	Please verify that the shaft is till in "phase". Even one spline off will throw the shaft out of balance. If it is a one piece shaft and phase cant be messed up, then make sure that the slip yoke is lubed properly. Even automatic transmissions require a little grease on the splines.

10-12-2008, 02:34 AM	#7
75K30 Senior Member Join Date: Jul 2006 Posts: 3,308	Totally forgot,...make sure that you have not overtightened the u-joints. Too tight and the bearing becomes a bushing, and this is not very good.

10-12-2008, 03:38 PM	#9
barbermike34 Senior Member Join Date: Oct 2008 Location: west kentucky Posts: 73	just took the back u joint out of my truck it had the shakes and the skweaks did have supervision mine fell into pieces on removel wasent that bad but pressing it back in the yolk and linning it back up was very important i was told.no more vibration or skweaks good luck

10-17-2008, 11:01 AM	#10
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,645	Look what I found. YouTube - Replacing a Rear Axle U Joint : How to Inspect U Joints

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