2-Wheel Drive 4/5 Speed Automatics A-518 4-speed auto 2-wheel drive with overdrive. Automatic 4-speed 518 remote mount. spicer 1350 front and rear yokes. Replaces carrier bearing in 2pc. driveshafts, or becomes carrier bearing in a one piece. All applications 89-93 including Cummins 6BT. Install price - $950.00* *Typical install & drive shaft modifications. Does not include any modifications to exhaust, transmission tunnel or any other custom modifications that may be required.