NP231 master rebuild kit


Rebuild Kit

1 Lock Nut: Front output yoke
2 Rubber seal: Front output yoke
3 Premium oil seal (double lip, dual spring): Front output yoke
4 O-Ring: Shift detent plug
5 Premium oil seal (double lip, dual spring): Input gear
6 O-Ring: Vacuum switch
7 O-Ring: Shift sector shaft
8 Nylon retaining ring: Shift sector O-Ring
9 Retaining ring: Input gear
10 Bearing: Input gear (See note below)
11 Bearing: Input gear pilot
12 Retaining ring: Synchronizer hub
13 Bearing: Front output shaft
14 Retaining ring: Front output bearing
15 Pocket bearing: Rear of front output shaft
16 Bearing (2): Drive sprocket
17 Oil seal: Oil pump
18 Bearing: Mainshaft rear output
19 Retaining ring: Rear output bearing
20 Screen: Oil pick-up
21 Bushing: Rear output housing
22 Oil seal: Rear output housing
23 Magnet
24 Pads: Mode fork
25 Pads: Range fork (Steel fork applications only)
26 Chain: Borg-Warner Morse (OEM) - Optional for all kits; available at extra cost.
27 Thrust washers: Both sides of the input gear - 2 required (See note below)
28 O-ring: oil pickup tube



Item #10: Some applications utilize a thin, single row ball bearing #6010NC3 for this item. On applications utilizing a wider, double row ball bearing #BD508, add $8.00 to each kit price. Each kit can be ordered with both single and double row bearings included for an additional $20.00.

Item #27: Add $5.00 to each kit price for a pair of these thrust washers.