rearend help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72shadetree · 03-17-2003, 01:22 AM

the 72 rear is acting up its a posi just changed grease and put the posi additive in it also.it sounds like chatter from a posi when its in a turn but mine only does it on straightaways when you are pulling off or backing up sounds like something catching and popping and also viberates the whole truck get up to around 10 mph it quits till ou stop again please help this is bugging me real bad

mikep · 03-17-2003, 01:47 AM

Hows the carrier bearing?

It doesnt really sound like spiders. If it were the clutches you wouldnt really notice a change if they were worn out except the rear would act like an open rear end. Ive had similar popping and chattering but only on fresh rear ends that hadnt soaked oil into the clutches fully and then only around corners..

72shadetree · 03-17-2003, 01:56 AM

everything looked fine when i had the cover off

72shadetree · 03-18-2003, 12:44 AM

ttp

69 Short Fleet · 03-18-2003, 07:43 AM

I had a wheel bearing (rear passenger side) go on me once just after I bought my truck, I went out an abandonded highway and dumped the clutch to see if I had a posi. rear end or not. After that it sounded like my rear end was shot (I thought I broke some teeth on the ring & pinion) I even had some mechanics go for test spins with me and they all said that it was most likely the rear end. The sound (from the bad wheel bearing) travelled all the way down the axle to the ring gear!! It sure was strange!!! Later, Doug

72shadetree · 03-18-2003, 09:45 PM

thanks

1-PU70 · 03-18-2003, 11:34 PM

What kind of adative did you use. Mine will only work with GM adative. With other brands it chatters.

72shadetree · 03-18-2003, 11:51 PM

i cant rember on that ill try changing it again when i get a chance if that dont work ill tear it down

03-17-2003, 01:22 AM	#1
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	rearend help the 72 rear is acting up its a posi just changed grease and put the posi additive in it also.it sounds like chatter from a posi when its in a turn but mine only does it on straightaways when you are pulling off or backing up sounds like something catching and popping and also viberates the whole truck get up to around 10 mph it quits till ou stop again please help this is bugging me real bad __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

03-17-2003, 01:47 AM	#2
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Hows the carrier bearing? It doesnt really sound like spiders. If it were the clutches you wouldnt really notice a change if they were worn out except the rear would act like an open rear end. Ive had similar popping and chattering but only on fresh rear ends that hadnt soaked oil into the clutches fully and then only around corners.. __________________ No truck :-(

03-17-2003, 01:56 AM	#3
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	everything looked fine when i had the cover off __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

03-18-2003, 12:44 AM	#4
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	ttp __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

03-18-2003, 09:45 PM	#6
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	thanks __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

03-18-2003, 07:43 AM	#5
69 Short Fleet Registered User Join Date: Nov 2002 Location: Kelowna B.C. Canada Posts: 1,086	I had a wheel bearing (rear passenger side) go on me once just after I bought my truck, I went out an abandonded highway and dumped the clutch to see if I had a posi. rear end or not. After that it sounded like my rear end was shot (I thought I broke some teeth on the ring & pinion) I even had some mechanics go for test spins with me and they all said that it was most likely the rear end. The sound (from the bad wheel bearing) travelled all the way down the axle to the ring gear!! It sure was strange!!! Later, Doug

03-18-2003, 11:34 PM	#7
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	What kind of adative did you use. Mine will only work with GM adative. With other brands it chatters. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

03-18-2003, 11:51 PM	#8
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	i cant rember on that ill try changing it again when i get a chance if that dont work ill tear it down __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va



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