87 L8000 7.8 Ford Diesel. 5 speed and single rear axle gear (no high/low). 39,000 GVWR.
I recently purchased the old fire truck and I have done a lot of work getting it ready for the road (tires, brakes, oil pan gasket, belts, batteries, etc.) Since there was no service record book I am replacing the fluids and doing many maintenance items so I have a good base line.
What weight gear oil for transmission and rear axle? 85w90? 140? Will be used as farm truck and infrequently. Where can I find it in the 5 gal bucket? I went to the local farm supply and they only sell it in the quarts.
Any recommendations for a gear oil pump for filling?