Gearbox, diff & transfer box recommendations HERE >

oilman · Post by **oilman** » Wed Jan 22, 2014 1:46 pm

Getting the right oil for gearboxes, diffs and transfer boxes can be tricky, so please ask here if there is any information that you need.

To help us to give the most accurate advice possible we do need some information about your car. e.g.
Make:
Model:
Year:
Manual/Auto:
Performance Modifications:
Driving style: (road / off-road / track etc.)
Any other information that may be relevant: e.g. approx BHP if modified, any transmission problems
What recommendation are you looking for? Gearbox, diffs, limited slip diffs, transfer boxes etc

Any oil we recommend is available to buy from us (if you would like to) for delivery throughout the UK and many destinations Worldwide. We offer a really extensive range of oils and lubricants from 11 major oil manufacturers at prices much lower than the high street and main dealers. We stock oils and fluids that meet pretty much all manufacturers and international specifications. Our brands include, Silkolene, Fuchs, Gulf, Castrol, Motul, Mobil, Millers Oils, Shell, Valvoline, Amsoil and Red Line.

Plus, as the Club is a member of our club discount scheme you can get discounts of at least 10% across our entire range.

To redeem your 10% club discount simply use the following club discount code at the checkout.

Once the code is added at the checkout you will then receive your extra 10% club discount. However this discount code cannot be used in conjunction with other offer codes, BUT the code can be used in conjunction with any of our offers on this page HERE that do not require offer codes.

Any questions please ask here or contact us via email at sales@opiepoils.co.uk

Finally, if there are any products we don't stock and you have difficulty getting hold of elsewhere, let us know and we'll see if we can stock them.

We look forward to being of help!

Cheers
Tim, Opie Oils

You can also contact us by phone on +44 1209 215164
(All oils recommended are available to buy online at my web site)

Post by **Merlin** » Wed Jan 22, 2014 1:55 pm

I am interested to see what fluid you think should be in my gearbox as the Kaaz has specific requirements. It was a major dilemma for me and there is little info on the net for Honda boxes with clutch pack LSD's. I did buy my fluids from Opie.

Make: Honda
Model: Prelude
Year: 1993
Manual/Auto: Manual
Performance Modifications: built N/A engine + gearbox with MFactory 4.64 final drive and Kaaz 1.5 way clutch pack LSD.
Driving style: 90% track

oilman · Post by **oilman** » Wed Jan 22, 2014 4:12 pm

Hi

Kaaz diffs can be a bit tricky, what oil are you currently using with it and is it working well?

Cheers

Tim

Post by **Merlin** » Wed Jan 22, 2014 4:26 pm

I went for a home-brew of Amsoil MTF + 2 fluid oz of Redline friction modifier and a bottle of Silkolene BOA 80w-90 gearbox / LSD fluid. So it is approximatly 50% Amsoil and 50% Silkolene.

I was concerned that the Kaaz fluid (80W 90) and its equivalents were too heavy for my Honda box and that the Amsoil was synthetic.

When cold it doesn't feel great but once warm it shifts very well. But I have only put 700 miles on it. Ask me what it is like at the of the year

oilman · Post by **oilman** » Wed Jan 22, 2014 4:37 pm

Hi

That was similar to what I was thinking for your gearbox, although I don't think I would add in the BOA, just the Amsoil (or Fuchs Sintofluid/Red Line MTL) and the friction modifier. That should improve the cold shifts.

Cheers

Tim

Post by **Merlin** » Thu Jan 23, 2014 11:27 am

@oilman

The reason why I added the BOA was that Kaaz say that you should not use synthetic fluids with the Kaaz. Since I could find no mineral based fluids that are thin enough to use in the Honda box and I didn't want to use purely synthetic fluid I went for a bit of both. So the BOA is diluted down with the much thinner Amsoil.

oilman · Post by **oilman** » Thu Jan 23, 2014 11:35 am

Hi

It kind of makes sense, but I don't know why Kaaz say you can't use synthetics (because the Kaaz oil is mineral based?). I don't think I've heard the reasoning for that. What you could use would be the Millers EP 75w-80 or Gulf Gear TX 75w-80 as they are thin enough and mineral based. The other consideration is what do they class as a synthetic?

http://www.opieoils.co.uk/pdfs/tech-art ... ptions.pdf

Do they mean group 3, 4 and 5? Or only true synthetics (4 & 5)? The Motul Motylgear is a group 3, so 100% mineral based, but modified enough to be called a synthetic. That would give better protection than a normal mineral oil, while still being 100% mineral oil based.

http://www.opieoils.co.uk/c-670-75w-80- ... fluid.aspx

Cheers

Tim

Post by **Merlin** » Thu Jan 23, 2014 11:44 am

Here is what Kaaz say:

Why can't I use synthetic oil for my limited slip differential whether or not it is front wheel drive or rear wheel drive?

When using synthetic fluids, we found during testing minor deposits of film residue on the surface of the clutch discs. This actually causes the friction plates to slip abruptly, translating into more noise and chattering during operational usage. Synthetic fluids may be recommended for rally spec vehicles which see majority of gravel usage common of encountering jumping or uneven terrain, synthetic fluids may aid in slippage to prevent major shock during one wheel contact landing. The initial shock encountered during one-wheel contacts may cause harm to the transmission/differential.

http://www.kaazusa.com/80w90.html

I'll have a look at that Millers EP 75w-80 or Gulf Gear TX 75w-80 when I come to replace my fluid (in another few thousand miles or so). Although are they not still too thick? Amsoil is 5W-30 isnt it?

oilman · Post by **oilman** » Thu Jan 23, 2014 12:47 pm

Hi

Thanks for that.

As the Amsoil is measured as an engine oil for some reason, they class it as a 5w-30, but a 5w-30 is roughly the same as a 75w-80 ear oil in viscosity terms.

Cheers

Tim

Post by **Merlin** » Thu Jan 23, 2014 12:51 pm

oilman wrote:As the Amsoil is measured as an engine oil for some reason, they class it as a 5w-30, but a 5w-30 is roughly the same as a 75w-80 ear oil in viscosity terms.

Awesome I didn't know that. You could tell how thick the Kaaz oil and Silkolene BOA was in comparison with the Amsoil by shaking the bottle and when I poured them . The Kaaz and Silkolene were really gloopy.