I been doing a full maintenance over haul on the deuce. But before I changed all the oils I did some research. And found rottella was the best engine oil for the deuce, but I wanted to change the trans, diff and the T-case oils so i looked around on SS and seen different opinions. I wanted the best so I stayed with all the same brand if it's the best for the engine it has to be good for the rest so here is what I found SHELL SPIRAX A 80W-90 HEAVY DUTY GEAR OIL API GL5 PERFORMANCE it covers everthing.
1 ENGINE OIL
Rottela T 3
2 TRANSMISSION
SHELL SPIRAX A 80W-90
3 TRANSFERCASE
SHELL SPIRAX A 80W-90
4 DIFFERENTIALS
SHELL SPIRAX A 80W-90
SHELL SPIRAX A 80W-90
HEAVY DUTY GEAR OIL API GL5 PERFORMANCE DESCRIPTION
Shell Spirax A 80W-90 is an extreme pressure, heavy duty lubricant recommended for hypoid or spiral bevel axles, gears and steering boxes of automotive equipment.
Shell Spirax A is also available as an SAE 85W-140 grade.
PERFORMANCE FEATURES
HEAVY DUTY.
Shell Spirax A 80W-90 contains extreme pressure additives which impart high load carrying capacity to the oil.
RUST AND OXIDATION RESISTANCE.
Shell Spirax A 80W-90 contains anti-corrosion and anti-oxidation additives which respectively aid in the corrosion protection of gear box components and prevent rapid oil oxidation.
OPERATING TEMPERATURES.
Shell Spirax A 80W-90 maintains multigrade characteristics, due to its high viscosity index, thus eliminating the need for seasonal oil changes.
SUMMARY OF BENEFITS
• Shell Spirax A 80W-90 protects all types of gears, including helical, spiral bevel and hypoid, against wear and does not attack yellow metal components sometimes present in gear systems.
• Multigrade characteristics enable maintenance of wear protection over a wide range of operating temperatures and reduces oil drag at start up.
• Shell Spirax A 80W-90 may be used in a wide variety of manual transmissions and vehicle axles.
HEALTH & SAFETY
Information is available on the relevant Material Safety Data Sheet
SPECIFICATIONS/APPROVALS
US MILITARY
MIL-L-2105D
API GL5