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Rear end

Rear end

Postby Jack clark [OP] » Dec 03 2019, 3:06pm

I have a 2000 Chevy Silverado Z71 4 x 4 I have tremendous amount of slack in the rear end while the truck is in park I can push the truck about 8 to 10 in before the driveshaft catches. When I take off and come to a stop I hear a clunk then there are times I will hear a rattle then I will start hearing a sound of grinding or something rolling around I have taken it to different places no one can seem to find what's wrong with it can you help please
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Re: Rear end

Postby GBSierraSLE » Dec 03 2019, 3:21pm

Sounds like your parking prawl is broken
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Re: Rear end

Postby mcen » Dec 03 2019, 5:49pm

i would pull the rear diff cover and check to see if the gears are messed up.
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Re: Rear end

Postby 19trax9519trax95 is online! » Dec 03 2019, 6:01pm

Sounds to me like you have excessive back lash in the gear set.

You will always be able to move the truck forward and rearward in park with the brake off.

All vehicles are like that.

But given the other issues you listed it seems you definitely have something going on in the diff.

If you put the park brake on, block the front wheels, put it in neutral and rotate the input yolk back and forth and that will give you a better representation of how much play is really there. Pushing the whole truck is not a good indicator at all since there are many other compounding factors that will change that.

If you pop your cover off, the back lash spec is .005"-.009" as a general spec. Usually the factory gears are set tighter than aftermarket from what I have seen. To measure this, you'll need a dial indicator and a magnetic base, or a vise grip base will also work if needed.

Stick the base to the diff housing and have the needle of the indicator as square to the ring gear tooth as possible. Then move the ring gear whole holding the pinion and measure that movement. That is your backlash.
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Transmission/DrivetrainTransmission and drivetrain related components. Discuss automatic and manual trans repairs and performance or talk about driveshafts or rear-ends and differentials. Diagnostics of 4-speed, 5-speed, or even 6-speed transmissions.
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