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Power Steering Fluid from Transmission fluid to Rotella 15/40


Flying Finn

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I have a VNL 770 with a Cummins ISX engine.  A diesel mechanic suggested I switch over to Rotella.  Anyone heard of doing this? Has anyone done it?

He told me allot of the old time truckers use engine oil.  I don't remember the reason.

If you changed over notice a difference in steering?

Any negatives to changing over?

Benefits?

 

Thanks

Brad

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25 minutes ago, Flying Finn said:

A diesel mechanic suggested I switch over to Rotella.  Anyone heard of doing this? Has anyone done it?

Brad

Before I did I would ask to drive his rig and see how it works. I am willing to bet he hasn't done this. I would NEVER do it. I am trying to figure how someone thinks engine oil and transmission oil can be swapped.  

Bill

2008 Newmar Mountain Aire model 4521
450 hp Cummins ISM
Allison 4000MH tran.
Towing a 2014 Honda CRV with a blue Ox tow bar

Home base Fort Worth Texas

A man who carries a cat by the tail learns something he can learn in no other way.

-Mark Twain-

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Engine oil is legit for Sheppard gears.  Dex II or III for TRW/Ross gears.  Watch your max temps if using engine oil.  Maybe put one of those sticky temp thermometers on the reservoir and check it out for awhile before swapping over.  Don't dry steer it with 10-40 either, but a truck shouldn't be dry steered anyways.

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  • 1 year later...

Had a similar situation. The mechanic told me that I need to switch power steering fluid from transmission fluid to Rotella. I told my friend about it (he's a car enthusiast) and he told me that there is something wrong with this suggestion. And he was right. Instead of switching fluids, I switched the mechanic himself, lol.

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