Fabco 688-0739 or 6880739 is a TN10 self locking nut with Dri-Loc #201, listed as a bearing lock nut in the factory parts lists for the TC 137, TC 237 and TC 38 transfer cases. A bearing lock nut threads onto a shaft and clamps the bearing in place so it stays positioned while the unit runs, and the locking feature keeps the nut from backing off under load. The TC 137 and TC 237 each use two per assembly (item 57), and the TC 38 lists it on the front output shaft (item 60) and the intermediate shaft. Call us to confirm fit for your unit.
This product has been superseded and is no longer available. If ordered, you will receive 688F0739.
Features
TN10 self locking nut with Dri-Loc #201
Listed as a bearing lock nut in the TC 137, TC 237 and TC 38 parts lists
Two per assembly in the TC 137 and TC 237 (item 57)
TC 38: front output shaft (item 60) and intermediate shaft assemblies
Locking feature is there to keep the nut from backing off in service
