Symptoms
Oil dripping from the transfer case flanges or slung around the propshaft ends, and a low transfer case oil level.
The fix, step by step
- The VG 080 transfer case has three output flanges, each with an inner and an outer seal.
- Unbolt the propshaft, hold the flange and remove the nut, pull the flange, then replace both seals.
- Inspect the flange's sealing surface for a groove.
- Refill, and change the transfer case and axle oils while you're at it, because Classic & Sports Car recommends asking for their service history.
Tools & part numbers
- Outer seal 020 997 57 47 and inner seal 020 997 56 47 64 (one each per flange)
- flange holding tool
- front transfer-case flange nut 460 282 03 72
- seal driver
Where to buy the parts
Transfer case output flange seal, outer 020 997 57 47Expedition Imports ↗Amazon ↗
Transfer case output flange seal, innerExpedition Imports ↗Amazon ↗
Front transfer case flange nut 460 282 03 72Expedition Imports ↗Amazon ↗
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Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.