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08-13-2014, 08:16 PM
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#1 |
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Registered User
Join Date: Mar 2011
Location: Havertown Pa
Posts: 392
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GM 14 bolt backlash ?
My 14 bolt has a whine over 30 mph while on the gas and cruising but it will stop when I let off the gas. I don't know the miles on the axle, it's from a CUCV. Can I adjust the backlash using a dial indicator and some marking compound to eliminate the whine, maybe move the carrier closer to the pinion, or are the gears done.
A local shop said the R&P need to be replaced because there is too much play in the pinion, I told him it had a Detroit locker in it, it should have play.
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72 CST 4x4 Blazer, 1 ton 70 SS Chevelle, L78, 396 Everytime someone calls your Blazer a Bronco, God kills a kitten. |
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08-14-2014, 04:35 PM
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#2 |
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Registered User
Join Date: Jun 2012
Location: cibolo tx
Posts: 1,033
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Re: GM 14 bolt backlash ?
Read the 14 bolt bible on pirate4x4
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08-14-2014, 08:16 PM
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#3 |
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Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,948
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Re: GM 14 bolt backlash ?
Once gears start to make noise they were either set up wrong in the first place or just worn out. Either way you need a new gear seat. Play between the ring and pinion has nothing to do with whether you have an open rear,locker or a posi unit. If the pinion has excessive movement the gears are worn out.
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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08-14-2014, 08:27 PM
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#4 |
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Registered User
Join Date: Mar 2011
Location: Havertown Pa
Posts: 392
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Re: GM 14 bolt backlash ?
Thanks Guys, Looks like new gears and install kit it is but which one's? I don't trust the super low price one's. It's been a long time since I've had to re gear an axle.
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72 CST 4x4 Blazer, 1 ton 70 SS Chevelle, L78, 396 Everytime someone calls your Blazer a Bronco, God kills a kitten. |
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08-14-2014, 08:48 PM
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#5 |
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Registered User
Join Date: Jun 2012
Location: cibolo tx
Posts: 1,033
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Re: GM 14 bolt backlash ?
The Detroit will rotate the pinion nearly a 1/4 turn. But the backlash is not affected by it. G2 is a good brand that I install nearly 10 axles a month in. I put 3 year 36k warranties on em. Excellent products. Have you taken the diff cover off yet?
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08-14-2014, 09:27 PM
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#6 |
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Registered User
Join Date: Mar 2011
Location: Havertown Pa
Posts: 392
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Re: GM 14 bolt backlash ?
Yes. I took the cover off to take a look and change the oil. That was before I drove it. I just got it back on the road when I noticed the whine.
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72 CST 4x4 Blazer, 1 ton 70 SS Chevelle, L78, 396 Everytime someone calls your Blazer a Bronco, God kills a kitten. |
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