gear oil

[Elton]

im wanting to switch to redline in the diffs and transfer case and mt-90 for the tranny now heres my question will there be any problems like leaks and such from switching to syn i have 148k miles on stock fulid yes go ahead and laugh o and one more thing will i lose any gear oil by havening the axle seal done

[sschaefer3]

In the desert we run Mobil 1, 75-140 in the diffs and 75-90 in the tranny/Tcase. I tried Redline, but I like Mobil 1 better. Stubbs explained to me that Mobil 1 is the only true synthetic. You can also get it at AutoZone for a very good price.

[Elton]

i should of said all i have around here is napa and carquest and all they have is redline royal purple and valvoline and i think lucas all im willing to spend on the oil its self is like 60 bucks

[jimbo74]

redline is fine oil, run it and forget about it

[MTL_4runner]

Here are the five industry standards for all automotive oils:
The base stocks that motor oils are blended from come in five groups that are industry standards.

Group I => traditional solvent refining, nearly obsolete but still number one in world wide production.

Group II => hydroprocessed for better purity and higher viscosity index, rapidly becoming dominant in the US market. "ISO-SYN" and "Purebase" are marketing names for group II.

Group III => similar technology as II, but longer, more expensive process, legally can be called synthetic. Most major brand and house brand sythetics are group III. Shell Helix Ultra is considered group III, but is made differently and is factory fill for Ferrari.

Group IV => Poly Alpha Olefin, the traditional synthetic, still a hydrocarbon. Amsoil, Mobil 1 and Royal Purple are primarily PAO.

Group V => esters, the most exotic and expensive, made from alcohols processed with acids. Redline and NEO are ester-based.

Alklated Napthelenes are another type of synthetic hydrocarbon made by ExxonMobil and blended in Mobil 1. They wont admit that it fits the definition of group III.

Make sure whichever synthetic oil you buy is actually made with PAOs (polyalphaolefin) or Esters, if not, you are not really getting a true synthetic or your moneys worth (Amsoil, Royal Purple, Redline, etc).

I'd try and go for the Amsoil if you can get it.

[Cebby]

I "run" Royal Purple in my 4Runner without any leaks or problems.

I changed the diffs on my Grand Cherokee to Mobile 1 at around 75k miles and developed an axle seal leak. It was likely a coincidence in my case since everything breaks on Jeeps eventually.

[p nut]

I have some Amsoil 75w-140 that I'll be putting in. The cost seem to be about the same as M1 and other brands that I priced out.

Oh, and good timing on the topic. This morning, I was going to research a bit to find out if 75w-140 could be used in the diff's. I've seen people post about using 80w-90, but not the 75w.

[Elton]

i think im going to just go with redline i had my axle seal done today so thats out of the way now and i gotta get the gaskets and such from the dealer

[Jrun]

I run redline and made the change from regular at 160,000 miles and I am now at 180,000 miles with no problems from the switch

[Elton]

was looking at the rear axle and notice this bracket over on the drivers side that i believe to be the e-brake its the cable in the middle of the axle it looks like it needs to be bolted to the axle its just flopping around ?

[Elton]

found a pic not the big arrow
http://i63.photobucket.com/albums/h154/Eltonh/More%20Stuff/panhard_005-1.jpg

[MTL_4runner]

Yes, that is for the e-brake cables.

[mkgarrison5]

walmart carries mobile 1 synthetics. well atleast mine does. sometimes its hard to find the diff oils there but they do sell them from what i know of.. just check and see

[Elton]

Yes, that is for the e-brake cables.
well i guess ill get around to fixing it when i do the shocks and the gear oil

[Elton]

just picked up 6qts of redline 75w-90 for $7.77ea which is the cheapest ive seen just have to order a few qts of mt-90 lets say if i came a little short on the tranny fluid could i use the whats left from the diff fuild ?

[Elton]

anyone know a place i can get mt-90 at a good price $32 bucks shipped is a little steep for my taste

[Elton]

hmm no help at all well i guess ill just order the mt-90 from jegs for 32 bucks