The Lake

Well maybe I should have left well enough alone. My 93 F150 302 4x4 has 125k, so I've been little by little getting it in better shape. Last week I did plugs, wire, rotor, cap; then changed the read diff fluid.

I took the cover off, drained the fluid, and refilled with Valvoline synthetic 75-90 per NAPA advice, adding a friction modifier. While the cover was off I looked and thought everything was where is should be, and only a little bit of metal shavings were on the magnetic plug.

Everything sounds fine driving at city speed, but when I get up to highway speed, and then decelerate, I am getting a distinctive growl, most notable from 60 - 50mph. The growl occurs whether the tranny is in drive or neutral, and whether 4x4 is engaged or not.

There are no noises when turning corners.

Any advice?

Thank you, Chuck

Just call me Sean

iTrader: (1)

First off make sure it's still full.