rear end help

[4speedburb]

ok, so im having an issue with my rear end, and i have no idea what it is, it makes a loud clunking like somthing metal is clunking, almost sounds like a broken u-joint and the drive shaft is hitting somthing. but it only happens when i let off the gas, or press the clutch in while driving. and its pissing gear lube from by the u-joint. any help would be greatly appreciated!

 

[bucket]

Sounds like a 10 bolt with a toasted pinion bearing. Jack the truck up by the rear axle, with the front wheels blocked. Give the rear of the shaft a good shake and look for movement (like up-down) in the u-joint/yoke/pinion area.

 

[4speedburb]

how would i go about giving the rear end a shake? like lift it up and down? or what

 

[bucket]

Just grab a hold of the rear of the drive shaft, and give it a shake.

 

[4speedburb]

alright cool!, ill give it a try

 

[Chaz]

Hey let me kno what u got cuz my burb also makes a clunking sound when i let off the gas,,,,but its an automatic th400,,,,,

 

[chevydude]

What axle are you running.

 

[Chaz]

I have a 3/4 ton 14b sf,,,,,1989 burban 5.7 th400

 

[HotRodPC]

I'd say U-Joint, but with the spewing of gear oil, Im with bucket and going to say the Pinion bearing has gone bad, and has wallered the bushing and seal at that will explain the spewing of gear oil.

 

[4speedburb]

yup, the pinion bearing is shot, i have all the parts i need to fix it, what tools will i need? and this is my first time doin any rear end work lol

 

[HotRodPC]

yup, the pinion bearing is shot, i have all the parts i need to fix it, what tools will i need? and this is my first time doin any rear end work lol

Standard basic hand tools, dial indicator and a magnetic or clamp base for the dial indicator.

HF has a cheap one that seems to work well for the occasional user.
Item #623 $13.99

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Item #5645 $12.99

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[89Suburban]

There is also a write up in here by crazy4offroad. Look it up, great info for tackling this project.

 

[J Knight]

I'm suprized at the restraint in this thread. Good job.

 

[HotRodPC]

I'm suprized at the restraint in this thread. Good job.

You're not even lying buddy !!! Starting with the title and the first sentence.

 

[bucket]

I'm suprized at the restraint in this thread. Good job.

Yup, we were good boys