Om1kron

depends on what kind of driving you do with it, probably rebuild every 6-7 years if just daily-ing. I've been on mine for about 4 and a half years now and who knows how long it's been in the car before I bought it. I've changed the diff fluid about 3 years ago with amsoil's heavy duty diff fluid, it's time for a change but the diff works flawlessly still.

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Wayne

reallygood101

really no ones got any advice

green_pea

I ended up using a Torco RGO (racing gear oil) in my kaaz 2way, which is a 85w140 and also a torco friction modifier (type F) to eliminate the chattering. Works a treat! also when your changing the oil every 6 months or so, it ends up much cheaper than buying the kaaz stuff

420sx

any gl5 75w90 and change it every 2-3 events. rotella is fine. there is no need for super expensive oil, however for best results add a bottle of FORD friction modifier to each oil change. i ran that bitch for 2 years and it locked perfect every time. no need to waste money that you will flush anyway.

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hydropgrahics!
ls1......

reallygood101

thanx man this is wat i did and its so quiet and locks up awesome but i did Valvoline 80w90 with ford friction modifier cost me under $20

rebornS14

how much fluid do i need to pick up for my diff? does it take more than 1 quart? i thought i used 1.5 before. should i pick up 2qts just incase?

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Ken_

Gonna bump this thread. I searched and found it still relevant. Thanks for the great info guys.

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Melonburst

Kaaz oil or equivalent, 75w-90 if its your daily. 80w-140 if youre tracking.

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derass

Obviously the KAAZ fluid is ideal. But it's also $50+ per can.

I used Castrol Hypoid-C 80W90 mineral gear oil and a bottle of Motorcraft (Ford) Friction Modifier. Works out to be around $20 per change.

KAAZ specifies mineral oil instead of synthetic. Capacity is about 1.5 qt. I changed mine every 2-3 track events and it always drained clean. If I were daily driving it, I would change it with every engine oil change.

jedi03

Plus one on cheap 75w90 with ford friction...I got mine from autozone, did break in them changed it...I daily drove ot and now buddy daily drives it about 3 years on it...should prob change it lol, uncle who has been racing since the 70s recommended it to me...

mad-ass

Damn this thread is old but I'll add

Owned my Kaaz 2 way now for about 10 years(S14, 4.08, w/high-capacity Greddy diff cover so it's about 2.4L of fluid), changed fluid every other oil change(so about every 6,000 miles of driving), making sure to use NON-SYNTHETIC 80w-90 gear oil and bottle Ford friction-modifier.

I usually end up using Valvoline since I can find that in a 4Qt/1 Gallon size. Having the extra-capacity diff cover made it challenging to find that Kaaz gear oil is so expensive and basically doubled the cost if I bought/used Kaaz oil. I have found 0 issues with my choice of oil in my diff and it's operations in past 10 years.

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