gearbox oil for old worn box ?

[croket]

Ok guys ive got a poxy cp51 box thats grinding into 3rd at the moment , just wondering if anyone has a recomended oil or addtive to soften said grinding.

I was think of putting some moreys into it that shits thick.

This is just short term as ill have a new box , transfer , diff and unis in it soon.
But there is a track day coming up and id like to not have to double clutch into 3rd everytime

 

[evo-gsr]

If the synchros are fucked I doubt thicker oil will make much difference man.

 

[croket]

Ur probly right , it sucks coz that logger will show up soon and just bought some 720cc injectors

 

[BMGTZ]

redline lightweight shock proof works on old boxes pretty well

 

[DOUGMO]

banana peel?

 

[evo-gsr]

Ur probly right , it sucks coz that logger will show up soon and just bought some 720cc injectors

always the way!

 

[evo-gsr]

banana peel?

isnt that better for temporary noise reduction!

 

[croket]

It would be ok if the wifes old car sold , id have a box from Mo on the truck already. Might give that redline stuff a go , its a pretty nasty grind.
Maybe if i just keep smashin it into 3rd itll clear up haha uh a

 

[MDK87]

For the couple of bottles you'll need to fill the case, you're close to buying the box haha
I tried that Nulon G70 stuff in my Skyline and it didn't really improve anything so don't bother with that.

 

[croket]

Hmm maybe ill just take it out and practice launching till i kill it hahaha.
Got another w5 at home to put back together , but was saving that for a full on build while i just cruise on the box im getting from u Mo

 

[White Knight]

I can't remember its full name mate, but wynns gearbox additive works real well. Like Mo, I have used the g70, and while no worse it didn't improve things that much really.
But the wynns additive worked well, its not gl-5 but I don't have worries with it after a few thousand lays.

 

[EVO-00X]

Put some Castrol VMX-M into it as it was specifically made for VR4 and GSR non mech LSD transmissions. Its cheap enough and seems to work good for old gearboxes.
I have used it in a few GSR's and Proton gearboxes and it works fine.
My Nimbus transmission used to crunch bad when shifting into first gear when I first got it. I put that stuff in and it made it shift better and doesnt crunch (well rarely anyway).
A change of oil wont fix any physical issues in the gearbox, but for goodness sake, dont throw that bluey green Redline Shockproof alien blood thick snotty clumpy shit into a gearbox. That'll make it worse lol

 

[croket]

Yeah castrol vmx is all i use , its in it now. I think i just hurt it bafly poor cp box. Was hoping for a bandaid solution to get me on the track to put some laps down in it

 

[4piknup]

I have a gsr synchro ring here. New.
Evo-oox may know if it will fit and if you can get to it without breaking any other bearings.

 

[croket]

Yeah castrol vmx is all i use , its in it now. I think i just hurt it bafly poor cp box. Was hoping for a bandaid solution to get me on the track to put some laps down in it

 

[croket]

Bloody double post oops , im gettin another box soon but have a track day at collie on the 16th. When you down bumbury way next jack ? You can come raid these boxes ive got , i only need some of the cases

 

[4piknup]

About 6 weeks away. If thats ok?

 

[croket]

Yeah mate they arnt going anywhere , your welcome to whatever bits you want

 

[EVO-00X]

3rd gear is on the input shaft. You need to pretty much destroy a bearing to get to it.
Its a full gearbox disassembly to do it.

 

[brisvr4]

No you don't Rob. You can press the whole lot off from under 3rd.
Unless you are using a wussy little press of course!
It's the bell housing end that you need to destroy to get it off.
But new bearings are a good idea whilst it's apart!