Were they using redline in my rear differential?

[The motor guy]

As some of you have seen in my other posts I bought a new to me 1999 dodge ram 2500 cummins with 210,000 miles and have been swapping out all the fluids. Now I typically do this with every used vehicle just to have a baseline because I always assume it just wasn't done.

Anyways, when I dumped the gear oil it was a nice bright red color to it. The only red gear oil I know of is redline. It's a dana 70 rear end, guess what was in there was better than what I put in. Lol I'm an amsoil fan, but I put valvoline in it just because I was going to do a short drain and flush, because I assumed it would be the original factory fill in there. Opinions?

 

[dippschtick]

My Red Line 75w85 gear oil wasn't red but the Ravenol MTF-1 75w85 I used was.

 

[The motor guy]

I think the shock proof oil is red

 

[CarDoc66]

I just did the diffs on my 2020 Tacoma with 75-85 Redline and it was not red in color.

 

[The motor guy]

I just did the diffs on my 2020 Tacoma with 75-85 Redline and it was not red in color.

I wonder what they used then.

 

[Wylie6G72]

Redline 75W-90 is amber. The last Shockproof I used was turquoise.

 

[CarDoc66]

Is it possible royal purple degrades to a red color? Or maybe it was an additive?

 

[someonesomewhere]

Redline 75W-90 is amber. The last Shockproof I used was turquoise.

MT-90 from Redline is amber, as well. It's so light it's almost clear. Haha

 

[oil pan 4]

As some of you have seen in my other posts I bought a new to me 1999 dodge ram 2500 cummins with 210,000 miles and have been swapping out all the fluids. Now I typically do this with every used vehicle just to have a baseline because I always assume it just wasn't done.

Anyways, when I dumped the gear oil it was a nice bright red color to it. The only red gear oil I know of is redline. It's a dana 70 rear end, guess what was in there was better than what I put in. Lol I'm an amsoil fan, but I put valvoline in it just because I was going to do a short drain and flush, because I assumed it would be the original factory fill in there. Opinions?

Probably flush with Mobil 1 synthetic as it's pao base too.
Redline wouldn't be my firsts choice for gear oil.
Only time I have ever used redline was as an addtive to clean out a neglected sluge engine.

 

[Opelman]

Pretty sure Mystik JT7 gear oil is red.

 

[The motor guy]

Pretty sure Mystik JT7 gear oil is red.

It looked like that red n tacky grease made by Lucas it was really impressive looking whatever it was lol nice and thick and gooey between my fingers