Mech Diff

[Don Dada]

Hey guys i have a 1.5way diff to install in my car but i'm not sure which body oil will work

Redline states "If lsd use 80W140" for the Gtr which is has a mech rear diff but where i'm from only has 75W140 available.

Can i use the 75W140 without any probs?? Are they that different?

Thanks

[The Dan]

Yes it is fine.

The way I normally do it is to buy Redline shockproof and a 1oz bottle of friction modifier.

Put the redline in and drive around the car park. If the diff is grabby, then put in 1/4 of the 1oz bottle. Test it again and keep adding until it drives smootly or how you want it.

75 vs 80 is not really anything to worry about.

[Don Dada]

Heard of some bad experiences with shockproof in mech diffs so i'll be using the 75W140 and the Redline friction modifier as well as i hate a overly noisy diff

[The Dan]

Heard of some bad experiences with shockproof in mech diffs so i'll be using the 75W140 and the Redline friction modifier as well as i hate a overly noisy diff

The bad experiences you heard of are most likely to be from people who have used it without the friction modifier. It seriously makes a huge difference. But as with anything, there is always a compromise. Redline is IMO the best quality gear fluid available. Some people don't like it, others love it. I have never had a single problem when using it and have only ever had good reports back from customers.

[Don Dada]

Yeh the shockproof line does not come with the friction modifier so it causes mech diffs to shudder and make noise

Thats why i prefer the 80W140 or 75W140 as it has some additive already plus i can add more to suit my liking

Redline make excellent products