1998 Ford F-150 Rear Oil Leak

THECKERMAN

MEMBER
1998 FORD F-150
V8
4WD
AUTOMATIC
140,000 MILES

I have been noticing a significant oil leak, between the engine and transmission. Between oil changes, every 3000 miles, I have to add 2 quarts of oil, and it is a quart low when I do them. The leak has been getting worse, because it did not do this when I got the truck 24000 miles ago. I know it is somewhere between the engine and transmission, because there is a significant fresh oil build up on the starter and other areas nearby. I'm sure the flywheel is throwing the oil, but I'm not sure where it is coming from. I know its not a transmission leak, because I have been checking its levels frequently, and it has been holding.

1 Reply

DAVE H

MECHANIC
13,384 POSTS

CRANKSHAFT REAR OIL SEAL
Removal
Remove transmission. See TRANSMISSION REMOVAL & INSTALLATION - TRUCKS article in TRANSMISSION SERVICING. Remove oil pan. See OIL PAN. Remove flywheel. Remove rear oil seal retainer.
Using Rear Crankshaft Slinger Remover (T95P-6701-AH) and Slide Hammer (T50T-100-A), remove oil slinger. Using Rear Crankshaft Seal Remover (T95P-6701-EH), remove oil seal.

Installation
Clean and inspect all mating surface. Install rear seal retainer. See Fig. 19. Using Rear Crankshaft Seal Replacer (T95P-6701-BH) and Rear Crankshaft Seal Adapter (T95P-6701-DH), install rear seal. With rear crankshaft adapter still installed, use Rear Crankshaft Slinger Replacer (T95P-6701-CH) and seal replacer to install seal slinger. To complete installation, reverse removal procedure. Tighten bolts to specifications. See TORQUE SPECIFICATIONS.
Fig. 19: Seal Retainer Bolt Tightening Sequence