Auto-Rx My Differential

[c3po]

I have a 1983 Chevrolet El Camino with 364,000 miles on a 305 engine that I have done Auto-Rx in:

1) Engine
2) Transmission
3) Powersteering

I was just wondering if it would be a good idea to do a 2 ounce dose of Auto-Rx in my differential since it holds 2 quarts. Then I would drive it for 1000 miles and drain.

I have always run synthetic gear lube in the differential, would I have to drain it and put dino gear oil with the Auto-Rx for best results.

Since it is a sealed unit would it just be better to change my fluid and not worry about using Auto-Rx. The rearend is a 10 bolt 7,5 rearend. I was wondering if there were any seals in the differential that would benefit from a Auto-Rx treatment.

 

[ARB1977]

I beleave on Auto Rx site it says you can add to the diff.

 

[c3po]

Wow, we have a lot of great responses to this topic. Someone on here has had to of used Auto-Rx in there differential.

 

[rg200amp]

I would just drain and use a good synthetic gear fluid. call it a day.

run it before you drain so all the metal particals are suspended in the fluid while you drain.


Lots of miles on that engine. Keep it going!!!

 

[c3po]

I am using Amsoil Severe Gear 75W-90 when I change it soon, it looks like it will be no to Auto-Rx on the Differential.

 

[Tempest]

I used it in a couple of Difs. Can't say it hurt, can't say it helped. Was mostly trying to get rid of another additive.

 

[c3po]

Tempest, if you did not notice any difference then maybe Auto-Rx is not really needed in the differential since:

1) It is a closed unit
2) All that is really going on is gears turning.

I guess it did not change the color of the fluid you drained out.

 

[Saturn_Fan]

Doesn't this belong in the oil additives area?