Gearbox Oils...

[chef_stagea]

hi all, just wondering what gbox oil were running out there,

im getting a gtr box, the dude said it was starting to crunch occasionally 3rd to 4th at like 8000rmp... (dont ask :S)

ive heard good things about redline shockproof and royal purple.

with the redline would i want a heavy or light?

seems like 75w 90 is a common thickness.

thanx all

Edited September 10, 2010 by chef_stagea

[dark.sky]

I always have heard NOT to put shockproof in because it ruins syncros.

Im running Castrol Syntrax 75w90 in a RB25 box.

[Dohmar]

hi all, just wondering what gbox oil were running out there,

im getting a gtr box, the dude said it was starting to crunch occasionally 3rd to 4th at like 8000rmp... (dont ask :S)

ive heard good things about redline shockproof and royal purple.

with the redline would i want a heavy or light?

seems like 75w 90 is a common thickness.

thanx all

if you're getting a gtr box and u know it has issues, then why not fix the problem rather than applying a band aid?

shockproof does root synchros. good for straight cut/dogboxes but BAD for gtr stock boxes

do yourself a favour - take the box to a trans workshop, get the synchros fixed and check out the gears for stress

-D

[TALBO]

I always have heard NOT to put shockproof in because it ruins syncros.

Im running Castrol Syntrax 75w90 in a RB25 box.

I've been told the same thing and read it on forums. I spoke to Shaun at Boostworx only yesterday (want to do both diff and gearbox) about this and he's assured me that this is what they use and recommend for gearboxes.

[RubyRS4]

I've been told the same thing and read it on forums. I spoke to Shaun at Boostworx only yesterday (want to do both diff and gearbox) about this and he's assured me that this is what they use and recommend for gearboxes.

I'd rather believe a pro, than forum 'experts'.

[Dohmar]

I'd rather believe a pro, than forum 'experts'.

Same. My mechanic however said the same thing as forum experts about the Shockproof (aka smurf poo) - said its notorious for wearing out synchros and then explained to me why

And considering how shagged my box is, I'm not surprised. Been using good quality mineral oil since and while I do have issues with the synchros, it hasnt gotten progressively worse

Even Redline themselves say on the website 'not to be used with synchromesh gearboxes'. so yeah. believe the company or believe the tuner? I know shaun knows his stuff but I personally would never use it

-D

[Rbware]

I run Redline Shockproof it worked for me and fixed the crunching

[Weezy]

As per shane's comment, redline light weight shock proof made my gearbox silky smooth.

[Tommy Kaira RL]

I have got redline shockproof lightweight after trying the castrol in my r33. It didnt fix the crunch from 1 to 2 but it did make it alot better. It only has a slight crunch every now and then

[skwiz]

After asking around about the shockproof stuff, sometimes it can be too thin, and feels like there is is no "resistance" in the gearbox, almost "too quick".

Ive got some Castrol Syntrans 75w-85 in my 20 box, feels nice.