Should i use shockproof? MT90? Fusch?

[siksII]

My gearbox crunches going into 2 and 3 when cold especially, and sometimes when going into 4-5.

Its goin in for water pump/timing belt/gbox oil 2morrrow, should i use redline mt90 or lightweight shockproof?

OR should i listen to hills and use that new fusch(spelling..) stuff?

I would generally take their advice, but i get the feeling they are making more $$ on fusch than other oils which is why they push it so much, and after seeing the inside of their custom plenum, im not sure whether to trust what they say anymore...

[ix9]

I use Castrol VMX80, I also had crunching from 4th - 5th.

It's all gone now

[Airzone]

I have lightweight shockproof... It's pretty good

[Duncan]

I also wacked in the redline and it made a huge difference to my crunching

[Jay95R33]

I used the VMX80. It helped a fair bit, but not as much as I would've liked.

I'll be using the redline light stuff next.

J

[Jetdat]

i also used the VMX80, helped but i will be trying redline next....

[T0nyGTSt]

Castrol VMX is nowhere near as good as Redline BUT it is only a 1/3 of the price

T.

[siksII]

True

Ill be doing the change 2morrow if i can get the nuts(!!) off.. I spoke to rick shaw performance and te guy rekcons for 33s like mine redline yellow(ultra lightweight) is the way to go.

I was gonna get it done at hills yesterday along with the water pump and timing belt, but they stuffed me around and dont actually have it in stock.

[KamikazeR33]

i went from redline to vmx80.... all of a sudden i get a crunch going into 2nd on cold

going back to redline stuff next time

[Jay95R33]

Hmmm, sounds like theres a big jump in improvement from VMX80 to Redline...

I really should try this stuff.. Any ideas if there is a distributor in Canberra at all??

J

[siksII]

On friday i changed gearbox oil in both a z32TT and my car with a friend. A tip for people...i was gonna write a guide on doing it but didnt have a digital camera with me.

Do not try and undo the top bung! Its impossible!!! we broke a ratchet spanner doing it!

instead, undo the speedo sender, pull it out and a nice big hole will be available.

Apparently the redline oil takes at least 500km to wear in. I have driven 250km, and this morning when the car was cold, crunching into 2nd and 3rd had completely gone. Even when i rushed a change. So yeah id recommend the redline oil.

[Jay95R33]

siksII - did you use ultra lightweight, or just the lightweight stuff??

What does everyone recommend? Ultra lightweight, or the lightweight?

J

[rb25]

J - DO NOT use the ultra lightweight. when it gets hot it expands and bleeds out of the breather i rekon ive lost about 500mL and the bottom of my gearbox is covered in this yellow shitty oil. Im changing to Castrol Syntrax 70/85 synthetic next weekend - see how that goes.

[Jay95R33]

Ahh, cool. I've got a 1-2nd crunch when cold. Does the lightweight do the same as the ultra lightweight (anyone know?).

Interested to see how you go.

J

[siksII]

I used the ultra lightweight....thats what the guy at rick shaw told me was best... maybe it isnt...i guess ill see!

[siksII]

Originally posted by rb25

J - DO NOT use the ultra lightweight. when it gets hot it expands and bleeds out of the breather i rekon ive lost about 500mL and the bottom of my gearbox is covered in this yellow shitty oil. Im changing to Castrol Syntrax 70/85 synthetic next weekend - see how that goes.

Just had a thought...maybe you overfilled and this makes the bleeding problem worse..cuz its only meant to have 2.8L But will accept more. I put in about 3.3L and it still wasnt coming back out of the hole..

[rb25]

siksII - it seems to expand under load and heat. it even mists up my din gauges

[siksII]

thats shit. Hope it magically doesnt happen to me. A friend was telling me something that may contribute to this expanding problem... He saw a test on lucas additives(favoured by a few workshops...) where when gears were spun slowly the lucas enhanced stuff stuck to the gears well, but when they were sped up, the lucas stuff bubbled ad frothed....causing extra heat..expansion...stuff like that which im sure would lead to issues like yours.

So yeah do u have additives in the oil?

I guess ill have to take the car for a hard drive to find out if it happens to me.

[rb25]

no additives, and yes, this is what i rekon is happening to mine, when the box is spinning fast, the oil is just bubbling and throwing off the gears. it actually feels like theres no oil in the box whatsoever now

[Jetdat]

Originally posted by siksII

Just had a thought...maybe you overfilled and this makes the bleeding problem worse..cuz its only meant to have 2.8L But will accept more. I put in about 3.3L and it still wasnt coming back out of the hole..

2.8 litres???

i almost put in 4 litres and was suprised when only 3 litres come out before i filled it up.

are u sure about this?