The following are the fluids that should be used in each type of steering gear:

Ross HF
[table th=0]ATF “E” or “F”,ATF Dexron 2,Ford Spec. M2C138CJ
Mobile SAE 10W30,Mobile SAE 10W40,Ashland SAE 10W40
Shell Rotella T SAE 30,Union SAE 10W40,Texaco SAE 10W40[/table]

Ross HFB
[table th=0]ATF “E” or “F”,ATF Dexron 2,Ford Spec. M2C138CJ
Mobile SAE 10W30,Mobile SAE 10W40,Ashland SAE 10W40
Shell Rotella T SAE 30,Union SAE 10W40,Texaco SAE 10W40
Mack EO-K2 Engine Oil,Unical Gaurdol SAE 15W40,Unical Gaurdol SAE 30
Essolube SAE 15W40,Chevron SAE 10W40[/table]

Ross TAS
[table th=0]ATF “E” or “F”,ATF Dexron 2,Ford Spec. M2C138CJ
Mobile SAE 10W30,Mobile SAE 10W40,Ashland SAE 10W40
Shell Rotella T SAE 30,Union SAE 10W40,Texaco SAE 10W40
Mack EO-K2 Engine Oil,Unical Gaurdol SAE 15W40,Texaco TL-1833
Exxon Nuto H32,Chevron SAE 10W40[/table]

Sheppard 292, 392,492,592 Series
[table th=0]10W40 (API SD-SE) Preferred,ATF “E” or “F”
GM Power Steering Fluid,Hydraulic Fluid[/table]

Sheppard M Series
[table th=0]15W40 Motor Oil, ATF Dextron 2
GM Power Steering Fluid,Hydraulic Fluid[/table]