Hey guys im going to be changing the oil in my front and rear Diffs, question is should I use Royal Purple or Red Line gear lube?
Thanks ~Gage~

 

Either is a good choice..I have used both, currently using RP in everything, just because I can get it locally off the shelf, and I can't get RL unless I order it.

My old Dodge (93 V10) I switched to Red Line in everything, and it was fine, the current F350, 460 has RP in everything but the trans..new trans, going to run it for about 10,000 first, and it is fine also..I did notice more change (smoother, better mileage by about 1/2 mpg when I did the t-case and diffs)when I swapped to RP in the Ford, but I can't say it was just because of the RP being better than Red Line, just way better than the stuff that was in it when I got the truck. (previous owner was all Pennzoil, all the time)

Long story short, both are a good choice, you can't go wrong on this one either way.

 

I like redline myself.....it is in my front and rear diffs.

 

Thanks guys for the info.
~Gage~

 

I like Redline for differentials, trannys (auto or manual), and power steering.

 

Thanks, I cant find eather brand at local stores anywhere, so im going to have to order it. ~Gage~

 

i put Amsoil in mine, no issues.

 

Redline here. Though Amsoil is a good one too.

 

Mobil 1 is what I use

 

R.P fan here!

 

Is it ok to use Royal Purple 75W90 in the front Diff, it have Limited Slip Additive in it.
Will it do any harm?
Thanks ~Gage~

 

The RP should not cause any issues with a LS diff. If it does, just add some more additive. I have not had to with the RP, it works fine by itself.

Unless you meant you DON'T have a LS front, and are worried about the additive..which is also fine. Won't have any effect on anything.

 

Thanks guys for all the help.
~Gage~