68 12 bolt
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Joined: Sep 2002
Posts: 9,705
From: Oakland, California
From CRG:
Furthermore, mid-year 67 models with 12-bolts received a passenger side traction bar or "radius rod" which was not used after moving to a "staggered" rear shock set-up in 1968.
1967 Camaro Radius Rod
Q: What models received 12-bolt axles?
A: 12-bolt axles were installed on all SS-396s, all SS-350s (with possible exceptions in 1969 noted below), and all Z-28s. In addition, 12-bolt axles were installed on the following cars:
1967-8 L30/M20 cars from approximately Dec 1966 through the end of the 1968 model year.
All models with the 1969 factory 4-wheel disc brake JL8 option.
1969 cars with the LM1 engine. It appears that the 12 bolt was used with all 4-speed and automatic transmissions. Use on the manual 3-speed transmission cars is unknown.
1969 cars with the L65 engine (which replaced the LM1 engine) and 4 speed transmission. Data is erratic on this drivetrain combination, some cars have 10 bolts, some have 12 bolts. Please contact us if you have a car with this drivetrain.
Note: GM documentation indicates that 1969 SS-350s and LM1s with automatic transmissions may have received a 10-bolt rear axle. So far only SS-350 cars with powerglides have been observed with 10 bolt axles. Please contact us if you have a car with this drivetrain.
A: 12-bolt axles were installed on all SS-396s, all SS-350s (with possible exceptions in 1969 noted below), and all Z-28s. In addition, 12-bolt axles were installed on the following cars:
1967-8 L30/M20 cars from approximately Dec 1966 through the end of the 1968 model year.
All models with the 1969 factory 4-wheel disc brake JL8 option.
1969 cars with the LM1 engine. It appears that the 12 bolt was used with all 4-speed and automatic transmissions. Use on the manual 3-speed transmission cars is unknown.
1969 cars with the L65 engine (which replaced the LM1 engine) and 4 speed transmission. Data is erratic on this drivetrain combination, some cars have 10 bolts, some have 12 bolts. Please contact us if you have a car with this drivetrain.
Note: GM documentation indicates that 1969 SS-350s and LM1s with automatic transmissions may have received a 10-bolt rear axle. So far only SS-350 cars with powerglides have been observed with 10 bolt axles. Please contact us if you have a car with this drivetrain.
1967 Camaro Radius Rod
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