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BadBowTie98

Rear End Noise And Transmission Question?!?

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Ok, So i'm trying to figure out if this is just another GM quirk, or if there is something wrong. Problem one: when one wheel spins on the snow, (open diff, not a G80 code Posi rear) the side that doesn't spin sounds like it's trying to engage somehow, but doesnt, and makes a whirring/grinding sound. Not too loud, but definatly noticable, this normal for a non posi diff, or does this sound like something has gone Arye? Problem Two: when on the throttle more than 40%, the 1 into 2 shift change is verrrry sloopy.. like hesitates to click into 2nd gear. would a simple trans flush take care of this? or does this sound like a tranny problem? I just spent $4100 on a new motor, i'd hate to dump more into a trans. the truck only has 120000 miles. I just bought this thing like 6 weeks ago, I miss my 98 K1500 :thumbs: Any input would be great! thanx!

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So I figured out the tranny is normal. But I'm still in mid-thought about what the rear end noise is? bearings maybe?

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You shift with the throttle applied? Why?

 

Also, about the rear end, if only one wheel spins, the spider gears have to apply all the torque/speed to one wheel. These are flat cut gears, not helical, and are noisy.

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well that's good atleast. sounds kinda normal I guess? How much of a pain would it be to put in a posi unit?

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Normal, yes. Good for it? No lol, spinning one wheel for any length of time can damage it.

 

Id assume you have to remove the ring/pinion, bolt on new differential, reinstall ring/pinion. Id recommend you let a shop take care of that. Install would probably be around 500+

 

A decent differential will be 500+

 

If the rear end has never been touched, id recommend all new bearings as well.

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