the right oil, oil for differentials and transfer case

[Hooligan]

My apologies oldtime. As I can't get what the manual calls for, I am always looking for a decent substitute. I thought it was a little light as MTF is 5-w30 "(Synthetic Synchromesh Transmission Fluid 5W-30 (MTF))". I know there's not a cross correlation but my understanding was an equivalent engine oil weight to the SAE 90 gear oil was something like a straight SAE 50 engine oil. I use MTF in the transmission of my wife's 1988 Chrysler Daytona Turbo (which calls for 5-w30 engine oil) and never considered using it in the Willys but quite possibly I am missing something. I'm sorry I misinterpreted it.

I think I will stick with the MTG though until I can find what is called for...

Warren

[oldtime]

Not a problem at all, I just want to be sure you understand the issue correctly.
I will indicate the following so that everyone understands what really needs to be known.

The following information is valid concerning lubrication for engines, transmissions, transfer cases, differentials and Ross steering gears.
Oil is oil !
No one should ever expect that use of super premium oils can make the lubricated assemblies last forever.
As long as one uses the following 4 guidlines they can't ruin the lubricated assemblies.

1] The primary concern is to make sure that the correct volume of oil is used.
2] The next important concern is to use the correct viscosity for the application and the climate.
3] Then make abolute sure the oil formulation is compatable to the intended application.
4] The final consideration is to replace these oils whenever contamitation becomes evident.

If all four of these conditions are met the service life will be at its peak concerning parts longevity.
And that is the very purpose for these lubricants, to promote a long service life.