Yes, 1989 or 90 on they came (Classics and then all P38's) with chain-driven Borg-Warner transfer case. Do not be fooled by no "actual" diff lock. They have a viscous coupling unit which acts on the center differential. The VCU is entirely mechanical in operation. It will provide 50-50 f/r lockup as a locked center diff for the duration of torque applied after inital slippage, or during high-torque situations. In addition, the P38's and some Classics have traction control as a supplement. The VCU's do not wear out and work exceptionally well. The only reason I would steer you away from a P38 is the $$ maintenance.