Hello I am new to this board and recently finished a turbo build. Appreciate any help to the following.
Was planning on doing the 14bolt axn axle up grade on my 03 Ecsb Silverado. Was wondering if anyone knows if this will bolt up to my 2 piece drive line without modification. I believe the 14bolt is 1350 and my drive shaft is gm3r so I would need a conversion u joint. Just trying to figure out if I will need to lengthen or shorten my drive shaft to make it fit.

 

I don`t have a 2 piece driveshaft but when I swapped in a 14 bolt AXN rear axle I just used a conversion U joint and did not need to shorten the shaft.

 

Conversion Joint yes.

If your stock height likely you won't need to shorten the drive shaft.

The Factory AXN equipped trucks where 5/8 of an inch shorter on the rear shaft than a 10 bolt truck.

 

The truck has a 4/6 Djm drop kit installed. If it is too long I figure I would need to remove it and take to driveshaft shop to shorten, balance.