Bad drumming sound

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GARRICK.CLARK
Posts: 595
Joined: Fri Aug 26, 2011 12:01 pm

Bad drumming sound

Post by GARRICK.CLARK » Sun Mar 25, 2018 9:49 am

Hi Guys.
On my split bus when I am driving down the road up to say 40mph all is good NO NOISE ISSUES. With the bus HIGHER than 40 mph which is an increase in RPM as well I experience a noisy drumming noise. The gears are there, no issue shifting, no jumping out of gear, I drove it like this yesterday for a couple hundred miles. just a loud drumming from the rear of the bus. Gets worse the faster you go. If I put the clutch in the noise goes away.
Its not like a diff whine.
Any ideas.
Thanks Guys.

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Pablo2
Posts: 408
Joined: Sat Jun 25, 2011 7:37 pm

Re: Bad drumming sound

Post by Pablo2 » Sun Mar 25, 2018 11:30 am

Just a wild guess .. Did you recently install a "Super Diff" ?
aka Pablo, gears, Geary
9.36 @ 146 in '86

GARRICK.CLARK
Posts: 595
Joined: Fri Aug 26, 2011 12:01 pm

Re: Bad drumming sound

Post by GARRICK.CLARK » Sun Mar 25, 2018 2:10 pm

No, Its a standard bus box. Could it be 1 or all the reduction box bearings worn out.

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Pablo2
Posts: 408
Joined: Sat Jun 25, 2011 7:37 pm

Re: Bad drumming sound

Post by Pablo2 » Sun Mar 25, 2018 4:56 pm

Could be .. but more likely your mainshaft ball bearing.
aka Pablo, gears, Geary
9.36 @ 146 in '86

GARRICK.CLARK
Posts: 595
Joined: Fri Aug 26, 2011 12:01 pm

Re: Bad drumming sound

Post by GARRICK.CLARK » Mon Mar 26, 2018 12:35 pm

ahh, roger that. Is the fact that its ok up to 40mph a good indicator that its the main shaft ball bearings.
Bad RGB bearings would show up as being ruff when you spin the drums by hand. Yes.
Thanks for input pablo

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