This is ZF BW255 U Drive Ratio: 1.511:1 Used but in excellence conditions
Code No. Y87559 – ZF BW2050
(1 Pair available)
This is ZF BW2050 Ratio: 1.50:1 SAE #1 new unit with warranty can handle up to 1550HP / 2350 RPM
Can ratio change to 2.50: 1 with additional charge