Transmissions and Drivetrain Need help with your trans? Problems with your axle?

driveshaft thumping noise

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Old Jul 6, 2010 | 07:30 AM
  #1  
86Z's Avatar
86Z
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From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
driveshaft thumping noise

could someone help me out with an issue i've been trying to diagnose, i'm running a tko-600, denny's nitrous ready driveshaft and a moser 12 bolt rear, when cruising mostly in 4th gear, where the throttle is lifted just enough to cruise (float) the driveshaft makes thumping noises, seems like it's rocking back and forth.
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Old Jul 6, 2010 | 08:32 AM
  #2  
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From: Enschede, Netherlands
Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: driveshaft thumping noise

play on slip yoke splines?
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Old Jul 6, 2010 | 10:07 AM
  #3  
86Z's Avatar
86Z
Thread Starter
TGO Supporter
25 Year Member
iTrader: (4)
 
Joined: Jul 1999
Posts: 1,992
Likes: 10
From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Re: driveshaft thumping noise

there does not seem to be any excess play, i've also tried a different driveshaft/slip yoke, same thing.
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Old Jul 6, 2010 | 10:34 AM
  #4  
Twin_Turbo's Avatar
Supreme Member
25 Year Member
iTrader: (25)
 
Joined: Jun 2000
Posts: 5,364
Likes: 51
From: Enschede, Netherlands
Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: driveshaft thumping noise

excessive backlash on the rearend, worn tranny mount..stuff like that
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Old Jul 6, 2010 | 11:03 AM
  #5  
86Z's Avatar
86Z
Thread Starter
TGO Supporter
25 Year Member
iTrader: (4)
 
Joined: Jul 1999
Posts: 1,992
Likes: 10
From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Re: driveshaft thumping noise

Checked all of that. that's why i'm stumped
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