Rb25Det Gear Box Oil

[mafia]

hey i wanna put new oil into my 25 box but im not sure what is a good oil to use

[Moodles2]

Good will be something full synthetic, depends how much you want to spend max on the oil itself?

[boostn0199]

Redline lightweight shockproof.

[turboedsloth]

Castrol VMX-M or penrite 75-85.

[popinr33]

+1 for redline lightweight shockproof.....one onf the best things i have ever done

[Moodles2]

Good gearbox with no know issues: Royal Purple Syncromax, Redline MT90, Motul Gear 300 (most expensive)

Good gearbox with minor crunch issue: Redline Shockproof Lightweight (very popular, I use it myself)

Rooted gearbox: Redline Shockproof Heavyweight

I'm not sure about Castrol to be honest, I've read people dropping their current oil for Castrol and it was worse than the old oil (some even putting the old oil back in)

[defari]

motul turbolite's

[10 4]

Good gearbox with no know issues: Royal Purple Syncromax, Redline MT90, Motul Gear 300 (most expensive)

Good gearbox with minor crunch issue: Redline Shockproof Lightweight (very popular, I use it myself)

Rooted gearbox: Redline Shockproof Heavyweight

I'm not sure about Castrol to be honest, I've read people dropping their current oil for Castrol and it was worse than the old oil (some even putting the old oil back in)

[LANDSCRIBBLE]

my synchro's are pretty "chunky". going into 4th now sometimes grinds. sometimes i go to grab 3rd from 2nd and it gets jammed in the middle somewhere.. only when i go from 2nd to 3rd though.

should i try heavyweight first or lightweight?

also does anyone know how many litres you need? (manual 25 box)

Thanks.

[10 4]

Lightweight you goose.

And stop going into first when you're still moving

Though what you've said doesn't sound good..

[turboedsloth]

I don't know about you guys, but i see the redline oil as a really expensive bandaid fix. By the sounds of it, all you's are really doing is hiding the fact that your gearbox is f**ked. I would rather spend what the redline oil costs on a rebuild kit/or a workshop rebuild if you don't know what you're doing. If the box was operating well it wouldn't matter what brand you used as long as it was the right grade.

[LANDSCRIBBLE]

Yea ive put up with it for a year or so now. The synchro's are screwed, just ive heard stories of people getting their box reconditioned and acting the same a few weeks/months later.

[turboedsloth]

It all depends how its been built. I use valve grinding paste to help new synchros and it takes a few kms to get them to work properly from new, am unsure of what other workshops use

[Staged_rs4]

a few years ago, i used a bright blue fully synthetic race gear oil. i had a crunchy second gear too. filled up, drove out into street, full noise, into second, no crunch, skids up the street.

be worth spending a bit more than your usual 75w90 gear oil.

[Moodles2]

Bright blue full synth is most likely shockproof lightweight aka smurf's blood

[Mitcho_7]

+1 for redline mt90 if your box is in pretty decent condition or go the redline shockproof if it's a little worn.

You should use about 3.5- 3.8 litres, but just keep pumping it in till it comes out the filler hole.

[r34unit]

Any used penrite 75-90 oil in there gear box ?

[B-rice]

Any distributors of Motul Gear 300 on here. oh anyone know where i could purchase this stuff from

[Samgrainger32]

to the guys using redline shockproof are you also adding a tube of g70 or just use the shockproof?

[boostn0199]

to the guys using redline shockproof are you also adding a tube of g70 or just use the shockproof?

straight redline.