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06-24-2015, 03:37 PM
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#1 |
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Lifted 85 K5 grinding noise when let off gas
Just picked up an 85 Jimmy and finally got it mobile. Has at least a 4"lift (Measured the blocks. Not sure about springs) I'm getting a grinding noise when I let off the gas at higher speeds...maybe 45mph+. Took a few pics of the driveshaft to see if the angles look right. Not sure if it would help to shim it up or if I have enough shaft engaging the splines of the transfer case.
Last edited by jcramsey; 06-24-2015 at 03:44 PM. |
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06-24-2015, 03:42 PM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: Lifted 85 K5 grinding noise when let off gas
One more
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06-24-2015, 10:54 PM
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#3 |
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I know the pieces fit
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
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Re: Lifted 85 K5 grinding noise when let off gas
I think you found your problem. Lengthening your drive shaft will help the angle on the upper U-joint. You might need a xfer case drop but not sure, I've read mixed reports about that.
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06-25-2015, 12:12 PM
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#4 |
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Registered User
Join Date: Oct 2011
Location: hudson,wi
Posts: 805
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Re: Lifted 85 K5 grinding noise when let off gas
drop your transfer case about an inch.
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06-25-2015, 12:22 PM
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#5 | ||
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: Lifted 85 K5 grinding noise when let off gas
Quote:
Quote:
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06-25-2015, 07:10 PM
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#6 |
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Registered User
Join Date: Sep 2013
Location: Redwood city, CA
Posts: 691
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Re: Lifted 85 K5 grinding noise when let off gas
Unlift the truck.
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06-25-2015, 10:02 PM
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#7 | |
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: Lifted 85 K5 grinding noise when let off gas
Quote:
I dropped the transfer case tonight so I'll take it for a test run tomorrow and see how that goes. |
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06-27-2015, 01:48 PM
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#8 |
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: Lifted 85 K5 grinding noise when let off gas
Transfer case drop did the trick. No weird vibes or grinding noises now. Front driveshaft is close to the exhaust crossover but haven't heard it make any contact. Gonna keep my eye on it and make sure it's not going to be an issue.
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07-09-2015, 06:56 AM
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#9 |
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Registered User
Join Date: Oct 2011
Location: hudson,wi
Posts: 805
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Re: Lifted 85 K5 grinding noise when let off gas
Glad the transfer case drop did the trick. It helps correct the steeper drive angle.
RIZ |
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