Hewland Oil?

[RobbieL]

Can anyone advise me on what gear oil to use on a Hewland Mk9 box (4 spd)?

[skeggysteve]

When I looked after race cars that use that 'box - many years ago! - we used ATF.
Changed often, every time we changed ratios, so very often!

[number 46]

Goggle hewland and the info should be on their website, you just need normal gear oil hypoid 90 I think, I use comma or any cheap stuff from a motor factors and change every ratio change, I have heard you can use engine oil if desperate!!

[lanan]

You should never use ATF. It has considerable friction properties that obviously aren't desirable in a manual gearbox.
Red Line do a quality light weight shockprrof gear oil.......or if on a budget, a std quality 70W-90 road car gear oil will cope with most applications.

[skeggysteve]

lanan said:

You should never use ATF.

I don't want to get into a internet shouty match but I posted in good faith.
We did use ATF because, as I remember it was a thin oil so there was less friction, we never had a problem with the gearbox cause by using ATF.

I have no doubt that 'proper' gear oil may make the 'box last longer etc.
But I don't know for sure that ATF will/would have shorten it's life.
To be fair I was talking about professional racing rather than club racing.

[lanan]

No problem Steve.
I have known Guys running ATF with no problems.
I was advised years ago, by William Hewland (clang), that it is a NO NO. So I have never done it......But if we all did what we were told, there would be no fun left..

[skeggysteve]

Graham!

[moochofun]

We have found that using Millers Oils new nano technology gear oil has given us greater longevity with our FGC gearbox. It might be worth a try?

[moochofun]

We have found that using Millers Oils new nano technology gear oil has given us greater longevity with our FGC gearbox. It might be worth a try?