Transmissions 7g2993 CATERPILLAR Transmission **exchange** Condition: Resealed/tested With A 90-day-warranty Alternate #'s: Or4034, 6p3760, 6p3759, 1t1325, 0r4034, To Fit Make: CATERPILLAR, To Fit Model: 637D-REAR, 639d-rear (non-retarded)