Re: BigKev's 1954 Packard Clipper Deluxe Sedan

Posted by Owen_Dyneto On 2009/1/29 16:29:20

SAE85W-140 high performance gear oil is an appropriate lubricant and is offered by many different manufacturers; i usually buy Pennzoil or Valvoline in 5 gallon cans. I've used this in hypoid differentials from the late 20s and up (except 1956 Twin Traction) for decades, never a problem.

Many of the older gear oils had phosphorous and sulfur-based antiwear compounds and the gradual degradation of these is what causes the odor you noted. It sure can stink.

I also use the same gear oil in all standard transmissions from 1932 and up, and also the steering gear boxes.