9 Bolt Spider gear cross shaft broke?
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Joined: Feb 2002
Posts: 1,036
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From: Prince Albert, Saskatchewan, Canada
Car: 1987 Trans Am GTA
Engine: 357ci Stealth Ram - Under Pressure
Transmission: Built 700r4/Pro Yank 3400 Extreme
Axle/Gears: 9-Bolt 3.27
9 Bolt Spider gear cross shaft broke?
Any idea what causes this? Is this a common failure in the 9 bolts?
Its seems like the only way this could happen was if the spider gear sized on the shaft then it sheered off. The other part of the shaft is still jammed in the spider gear.
Seemed like the diff was working fine, only once or twice it did a one wheel burnout in the burnout box at the track. It made no noise so I didn't expect to find anything broken and thought it just needed to be shimmed.
The metal remains found their way between the side gears & posi cones and between the posi cones and carrier housing so everything is all scored up now.
Here are some pics
Its seems like the only way this could happen was if the spider gear sized on the shaft then it sheered off. The other part of the shaft is still jammed in the spider gear.
Seemed like the diff was working fine, only once or twice it did a one wheel burnout in the burnout box at the track. It made no noise so I didn't expect to find anything broken and thought it just needed to be shimmed.
The metal remains found their way between the side gears & posi cones and between the posi cones and carrier housing so everything is all scored up now.
Here are some pics
Joined: Sep 2004
Posts: 2,777
Likes: 7
From: Casselberry, FLA
Car: 88 V6 'bird/89TBI bird/85 T/A
Engine: 2.8/TBI/TPI
Transmission: V8 T-5/700R4 x2
Axle/Gears: 3.42 open/2.73 open/ 3.27 9 bolt
Re: 9 Bolt Spider gear cross shaft broke?
Well, you said it, the smaller pinions got some kind of contamination in them and the shaft seized. The rest is history.
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