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#1
02-06-2022, 07:46 PM
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Front outer bearing size in '78
So all these years I believed the shop manual that 78 and 77 took a different front outer bearing. Pulled off my 78 original rotor today and measured-same size as earlier 0.750 ID. So maybe '79 is the correct year many other sources have-just not my 78 manual.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#2
02-07-2022, 08:45 AM
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79 is when they changed BOMK.
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#3
02-07-2022, 10:30 AM
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My 78 manual even has a picture of using a 77 rotor on 78 and vice versa saying 78 changed.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#4
02-08-2022, 03:11 PM
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Changed in 1979. Check your spindle. Part numbers are stamped on the inside of them, and for '79+, the numbers are 14012595 and 14012596 (the service manual will show those numbers for 80-81, but they have been found on '79's as well). If those are the spindles (aka knuckles) you have, then that's how you'll know you need to get 79+ wheel bearings.
For reference, if you end up having to change the spindles, they do reproduce BOTH the 1970-1978 and 1979+ spindles in stock height, you just need to know where to look. CPP sells the new 70-78 ones, even though their listing on their website says they're out of stock as well as the outsourced listing on classic industries, this is inaccurate. Just call CPP themselves, they have a ton of them. Then for '79+, the QA1 repros (#9056-104) match perfectly. Sadly, I didn't find this out until AFTER I searched tirelessly for a NOS passenger side 14012596 unit to replace my original spindle due to a lower ball joint failure attributed to an egged out tapered hole in my original knuckle.
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1979 Trans Am W72 400/4-Speed WS6 - Starlight Black Hardtop  |
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#5
02-25-2022, 02:10 PM
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Here you go from the manual.
Mien was a fairly late build in 78 too. Thanks for the numbers. I guess I could have looked at my 81 spindles for casting #. Swapped on the 12" rotor new B spindles on it. I think I got the last GM 12" spindles around.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs Last edited by Skip Fix; 02-25-2022 at 02:17 PM. |
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#6
03-02-2022, 02:34 PM
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Look at the bearing number, order same
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JIM |
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#7
03-04-2022, 08:06 AM
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Quote:
NOPE...you didn't.....lol I just put a set of 1996 Buick Roadmaster spidles on mine. Only difference with the newer ones is the wheel speed sensor addition. |
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