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Problems with 9" pinion preload

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Old Sep 29, 2011 | 07:45 PM
  #1  
robguitargod1's Avatar
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Problems with 9" pinion preload

I have a lot of play (1/8") in my 9" pinion even after removing/adding all shims and torquing to spec. Just want to make sure I'm not missing anything! What could be causing this?

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Here'a a vid:

http://s816.photobucket.com/albums/z...929_145415.mp4
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Old Sep 29, 2011 | 07:54 PM
  #2  
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Problems with 9" pinion preload

Im not seeing a crush sleeve or washer 4 your pinion nut
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Old Sep 29, 2011 | 07:56 PM
  #3  
robguitargod1's Avatar
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: Problems with 9" pinion preload

Originally Posted by TTOP350
Im not seeing a crush sleeve or washer 4 your pinion nut
It's a preload washer with shims. It's all the way on the left, and the shims are on top of the red matco torque wrench. It's .510" tall exactly the same as the crush sleeve.
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Old Sep 29, 2011 | 07:59 PM
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Problems with 9" pinion preload

I wondered what that was. Thought it may be a solid spacer. does the bearing you have (thats not pressed on) slide down past the splines on the pinion??
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Old Sep 29, 2011 | 08:00 PM
  #5  
robguitargod1's Avatar
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: Problems with 9" pinion preload

Originally Posted by TTOP350
I wondered what that was.
I bought it directly from Strange because I live right down the street from them.
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Old Sep 29, 2011 | 08:17 PM
  #6  
TTOP350's Avatar
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Problems with 9" pinion preload

The pinion slides up in the yoke waaaay easy. make sure you put some teflon paste on the splines to keep it from leaking oil.
Do you have a thick washer under your pinion nut? Im not seeing it?
since you have used the pinion nut make sure the last time you put it on that you use some locktite on it.
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Old Sep 30, 2011 | 05:00 PM
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robguitargod1's Avatar
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: Problems with 9" pinion preload

PROBLEM SOLVED. Here's what it was: Apparently you need an addition spacer if you use a chromoly yoke with an OEM style (same size front and rear bearings) pinion support. Strange offers these spacers (you get 2 of different thicknesses) in their install kits, but does not list them individually in their catalog.

Basically the yoke is too short, so you add this spacer to make up the space. After that everything's fine.

Thanks to TTOP350 for the help.

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Old Sep 30, 2011 | 05:17 PM
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Problems with 9" pinion preload

good work! glad you got it squared away!
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