I was cleaning my garage and found a set of used 12 bolt gears in great shape. I would like to know the origin of them. Ring gear GM part #3853010 11 39 10 68 Pinion gear GM # 385 3008 11 39 I know that these are a 3.55 ratio but what about: Year?? Car??? etc?? I will put these up for sale soon in the parts for sale forum. Thanks Tim
10 68 is the manuf. date so those are for a 69 rear axle. Don't know if it is for car or truck. Ask Monzaz or oPh
With that GM mfg date & 12 bolts there are only three possibities... -12 bolt Chevy Car -12 bolt Chevy pickup ('64 1/2-82) -12 bolt Pontiac "P" series ('65-70) Scratch the truck appl (no 3.55's) & the Pontiac application (not 97xxxxx numbers). They're 12 bolt Chevy car. :3gears: Roger
With that GM mfg date & 12 bolts there are only three possibities... -12 bolt Chevy Car -12 bolt Chevy pickup ('64 1/2-82) -12 bolt Pontiac "P" series ('65-70) Scratch the truck appl (no 3.55's) & the Pontiac application (not 97xxxxx numbers). They're 12 bolt Chevy car, I have two sets mfg 12-18 months later. :3gears: Roger
