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08-16-2011, 08:07 AM
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#1 |
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Quit if it's not FUN!!!
Join Date: Jul 2010
Location: Indian Trail, N.C,
Posts: 864
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Differential trouble?
 O.K. Since my '70 stepper is now my DD, I've noticed something odd. Truck has a OEM 3.07 posi rear. When making a left turn from a stop, it feels like the rear is "grabbing" /(slipping?). There is some audible but light noise. Once you straighten out, it's fine. And, it doesn't seem to be as noticeable on a right turn from start. I had the local lube guy check the oil and it's full. I'm thinking I should pull the cover and check for wear, and hopefully refill and go. I want to add a fill plug. What level??? |
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08-16-2011, 09:01 AM
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#2 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Differential trouble?
12bolt rears came from the GMfactory with a fill plug// they did not however come with a drain plug
it is good to drain and check for wear// i like using synthetic when i do the job, most synthetics you dont need a posi additive like dino stuff needs
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-16-2011, 10:03 AM
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#3 |
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1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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Re: Differential trouble?
This is common with posi rears and all you would need is a bottle of posi lube.
I'd add a bottle of posi additive and do some figure 8's to work it in. Should fix it.
__________________
Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10 |
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08-20-2011, 09:17 AM
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#4 | |
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Quit if it's not FUN!!!
Join Date: Jul 2010
Location: Indian Trail, N.C,
Posts: 864
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Re: Differential trouble?
Quote:
Drained the rear, looked good, no metal inside. Filled with fresh gear oil plus a bottle of GM posi additive, did the figure-8 thing and all appears to be well. Even took time to strip and paint the cover. |
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08-20-2011, 10:12 AM
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#5 |
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1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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Re: Differential trouble?
I love a happy ending.
 Glad things worked out for you.
__________________
Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10 |
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