best gearbox oil

anyone tried castrol VMX 80??? its a Gl4 oil aswel

http://www.castrol.com/en_au/australia/products/cars/manual-transmission-fluids/manual-vmx-80w.htmll

or there is a
Castrol Manual Vmx-m 75w-85

 

The PTFE in nulon types also breaks down under high temp and pressure into flouro and poly compounds/ chains which are highly corrosive to metal - not ideal for bearings or journals in anything but as always with oils, it is manageable if you change regularly before it builds up in corrosive quantities.

Many synthetics also carry other additives that also break down into corrosives such as sulphur etc.

Its a tough choice when it comes to transmission oils, but I think the key is to just change regularly regardless.

Redline MT90 is my choice - it meets the specs

 

My vote is for Redline MT-85

 

might try and rig up a breather hose that terminates into a little catch tank where the aivs previosly were ...

or just bight the bullet and get some mt90

 

Or run plain old 80/90 gear oil from the local servo and never have a drama again!!!!!!!
E

 

anyone got a picture of the baffle setup inside the gear box out of interest?

 

id also be interested to see this baffle thats caused many people grief over the years.

 

I posted up a pic of it a while back, can't remember the thread

 

Gah....Pfff... what use are you then.......?

E

 

Schematics of breather

http://www.aus300zx.com/forum/showthread.php?t=330833

http://www.aus300zx.com/forum/showthread.php?t=304259



The parts:

The breather https://conceptzperformance.com/Cart/description.php?II=8539


Baffle plate https://conceptzperformance.com/Cart/description.php?II=4963

 

Just noticed the breather pipe looks different - this one is for the diff whereas the tranny one is a 180 degree pipe - hard to find even with a part number!

 

People just need to learn to search Tas
http://www.aus300zx.com/forum/showthread.php?t=330833