The Fel-Pro BS 40635 is a rear main seal set that seals the crankshaft where it exits the engine block, sealing the rotating crank journal against oil leaks at the rear main bearing on the applications listed below, restoring a clean sealing surface for a reliable, oil-tight seal.
| Brand | Fel-Pro |
| Part Number | BS 40635 |
| Product Type | Rear Main Seal Set |
| Engine | L6 (7.8L/6.6L) |
| UPC | 084113731204 |
| Shipping Dimensions | 17.25 x 4 x 0.18 in, 0.34 lb |
Vehicle Fitment:
- 1988-1988 Ford C8000 7.8L
- 1986-1990 Ford CF6000 6.6L
- 1986-1993 Ford F600 6.6, 7.8L
- 1987-1993 Ford F700 6.6, 7.8L
- 1987-1993 Ford F800 7.8, 6.6L
- 1987-1987 Ford LN7000 7.8, 6.6L
- 1987-1989 Ford LN8000 7.8L
- 1987-1993 Ford B600 6.6L
- 1987-1993 Ford B700 7.8, 6.6L
- 1988-1993 Ford CFT8000 7.8L
- 1987-1993 Ford LS8000F 7.8L
- 1987-1987 Ford LTS8000 7.8L
Important Notes:
- Lubricate the seal lip and crankshaft journal lightly before installation; never run the lip dry.
- Verify one-piece versus two-piece rear main seal design against your engine before ordering.
- Rear main seal replacement usually requires removing the oil pan or transmission - inspect the oil pan gasket and rear main bearing while the area is open.
WARNING: WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm.
