100 series rear diff playing up.

Your sentiments on additives are really curious.

You say you wouldn't give work to a mechanic that would use an additive.

It's curious because LSD oil is normal diff oil with an additive for the plates.

Oil is a balance of ingredients designed by the oil company to provide an optimum product for the purpose defined. Mucking about with it only detracts. Nothing curious except the way people throw money at things that are not required.

Thats my take anyway but I appreciate your comments. I would never learn anything if I didnt listen.

Owen

It's true that oil companies do a lot of research to find new and better oils for various applications, and virtually all products are in fact a mixture if ingredients. Each ingredient is an additive.

But it's equally valid to create your own blend if you need to.

When we were kart racing, we needed to blend our fuel manually all the time - for some engines 50:1 pulp with fully synthetic Silkolene Pro oil, others required 16:1 with caster oil, others 18:1 with relatively standard 2 stroke oil. If we were to try and run the engines without the oil additive, they would seize and on the other hand to try and run them on the oil only wouldn't get us far. In each case the additive transformed a show stopper into a fully functioning engine (and heaps of fun !!! )

If you are at Birdsville and need to change your LSD oil, you may need to use plain diff oil plus an LSD additive because that's all that you can buy. The additive will transform the plate shuddering diff into a properly functioning unit. Clearly if you can buy the manufacturer recommended diff oil it makes sense to do so.

That's why I reckon any additive for any product should be evaluated on its merits, and not dismissed because it isn't available pre-mixed.

Cheers

Point taken. I shall take that on board and stop criticising additives.

Thanks for the feedback.

Owen

Make sure you open the filler first, as it is a PITA if you drain the diff and can't open the filler plug LOL

Cheers Kev

Nav 8
Don't be silly, I don't see the need for diff oil changes at 20K or 40K , I have always done mine at or near 100K to 150K , the rear Diff has done 712,000Klm , I add Wynnes or Nulon,


Doug

No there shouldn`t be a need to change at those Ks but on two occasions now I have experienced this problem. I change the oil and the symptom immediately disappears. It starts to grab at around 30000K and I use a good quality oil Penrite LSD 90. Nav.

just use a major brand
LS90

I use Castrol LSX 90. Available from Super Cheap for a good price...

All is good. No noise and no leaks.
Thanks for the tips.
Andrew