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

87 GTA 9 bolt question

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Old Jan 14, 2026 | 05:59 PM
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87gtaredonred's Avatar
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87 GTA 9 bolt question

Hey guys not sure if I screwed up. I swapped out the axle bearing on my passenger side went pretty straight forward. My issue is I can't get the axle shaft all the way back in. I've rocked the other wheel some hoping it would mesh but its in like 95% in if im making sense. What else do I need to do or did I screw up, never did this before. Thanks in advance!

Last edited by 87gtaredonred; Jan 15, 2026 at 06:21 AM.
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Old Jan 16, 2026 | 08:22 PM
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Don Fetherolf's Avatar
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From: Eastern PA
Car: 1989 Pontiac Firebird Formula 350
Engine: 5.7 TPI
Transmission: Auto
Axle/Gears: 9 Bolt 3:27
Re: 87 GTA 9 bolt question

Originally Posted by 87gtaredonred
Hey guys not sure if I screwed up. I swapped out the axle bearing on my passenger side went pretty straight forward. My issue is I can't get the axle shaft all the way back in. I've rocked the other wheel some hoping it would mesh but its in like 95% in if im making sense. What else do I need to do or did I screw up, never did this before. Thanks in advance!
Did you match up the new bearing to the one removed? The new bearing could be wider and is bottoming out in the axle housing bore.
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Old Jan 17, 2026 | 07:18 AM
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Re: 87 GTA 9 bolt question

Originally Posted by Don Fetherolf
Did you match up the new bearing to the one removed? The new bearing could be wider and is bottoming out in the axle housing bore.
Yes is the correct bearing Timken Set9, it was same size.
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Old Jan 22, 2026 | 08:37 AM
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Car: '89 GTA
Engine: ZZ6TPI
Transmission: T56
Axle/Gears: Borg Warner 3.70:1
Re: 87 GTA 9 bolt question

Make sure the bearing and collar are pressed all the way on. to the axle The other thing it could be is the posi cone and spider gear splines are not lined up. With the transmission in park or in gear (immobilize the driveshaft), hold the opposite wheel still and while installing the axle, when it doesn't want to go any further, turn the axle a little bit to rotate the posi cone and line up the splines with the spider gear. Depending on how good the posi is, it may or may not take some force (2' breaker bar between the lug studs will do it).
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Old Jan 22, 2026 | 01:43 PM
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Re: 87 GTA 9 bolt question

Originally Posted by TransamGTA350
Make sure the bearing and collar are pressed all the way on. to the axle The other thing it could be is the posi cone and spider gear splines are not lined up. With the transmission in park or in gear (immobilize the driveshaft), hold the opposite wheel still and while installing the axle, when it doesn't want to go any further, turn the axle a little bit to rotate the posi cone and line up the splines with the spider gear. Depending on how good the posi is, it may or may not take some force (2' breaker bar between the lug studs will do it).
Yes the bearing is all the way pressed on well it went to the edge and its where the old one was lol. I pulled up the parking brake the one side is locked down now I noticed when i bar over the axle the carrier is still turning I think i need to have someone hold down the carrier while I bar over the axle now, just need to find a friend lol. Hoping that's my issue. At least ive taught myself a ton about these 9 bolts
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