Did all SS with a 350 4sp have 12 bolt rearends? If this 350 4sp 10 bolt rearend I am looking at pretty much say it is not a real SS?

Gary

1. Yes assuming 67-69. don't know for sure about later years.

2. Not necessarily - the 12 bolt could have broken or for some other reason been replaced with the more plentiful 10 bolt. You need to investigate further.

It is a 69

Gary

From CRG

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.

Kev