12 bolt locker

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68post

very, VERY, limited access member
Joined
Feb 20, 2014
Posts
281
Reaction score
97
Location
Indianapolis
First Name
Tim
Truck Year
1984
Truck Model
84 K30 SRW Silverado, 85 C20 C6P
Engine Size
454, TBD
I had a Detroit Locker in a work truck and it wasn't pleasant on a slick surface. It will push the truck straight forward when turning until you let off the gas pedal.

A much better locker for the street would be the Detroit TrueTrac, and I'd suggest a carrier bearing billet steel cap for the driver's side and installed with studs - which will make the rear stronger. It prevents gear deflection the same as the support covers help with.

A truck 12 bolt uses a smaller pinion shaft diameter compared to the car 12 bolt rears, so it isn't quite as strong ( making car to truck comparisons invalid). A 14 bolt semi-floating rear axle is the next step up , then the 14 bolt full-floating as the "top dog".

Stock the 14 bolts are both an 8 lug wheel setup, some 14 bolt SF's are 6 lug.

If you upgrade to an aftermarket; differential , gears, axles , and reinforce the carrier bearing cap ( no need to do both caps) - the 12 bolt will be very stout. But unless you are changing the suspension to aid traction and weight transfer, along with sticky tires - all of that will not be necessary !
 

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