Problems with 9" pinion preload
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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?

Here'a a vid:
http://s816.photobucket.com/albums/z...929_145415.mp4

Here'a a vid:
http://s816.photobucket.com/albums/z...929_145415.mp4
Joined: Oct 2001
Posts: 12,221
Likes: 1,141
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
Thread Starter
Senior Member
iTrader: (4)
Joined: Oct 2008
Posts: 857
Likes: 5
From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Joined: Oct 2001
Posts: 12,221
Likes: 1,141
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??
Thread Starter
Senior Member
iTrader: (4)
Joined: Oct 2008
Posts: 857
Likes: 5
From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Joined: Oct 2001
Posts: 12,221
Likes: 1,141
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.
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.
Thread Starter
Senior Member
iTrader: (4)
Joined: Oct 2008
Posts: 857
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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.
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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Joined: Oct 2001
Posts: 12,221
Likes: 1,141
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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