Mud-club

Vehicle & Technical => Series Land Rovers => Topic started by: cjcarlos1977 on February 04, 2006, 19:57:02

Title: Gear Box oils
Post by: cjcarlos1977 on February 04, 2006, 19:57:02

Hello there,

Does the gear boxes in a 1976 take Ep90 gear oil or engine oil? This may seem a stupid question to ask im gonna be under her tomorrow checking and as this is me first landy im not sure.


Cheers

Carl

( Series 3 1976 )

Title: Gear Box oils
Post by: Xtremeteam on February 04, 2006, 20:19:36

ep90 in the series boxs i think

Title: Gear Box oils
Post by: blackbob on February 04, 2006, 21:01:45

:D yes it is ep90  :D

Title: Gear Box oils
Post by: hobbit on February 04, 2006, 21:34:30

All the underside takes 90, diffs, gearbox, transfer box, swivel housings.

Title: Gear Box oils
Post by: Rich_P on February 04, 2006, 21:51:40

Remember to put in EP90 GL4 spec and not EP90 GL5, into the gearbox or you may find you loose syncro on all gears with some damage to the gears themselves.

Title: Gear Box oils
Post by: cjcarlos1977 on February 05, 2006, 08:42:13

Cheers thanks for your help!

Carl

Title: Gear Box oils
Post by: ian_s on February 06, 2006, 08:29:13

Quote from: "Steel"

Remember to put in EP90 GL4 spec and not EP90 GL5, into the gearbox or you may find you loose syncro on all gears with some damage to the gears themselves.

really? i'b better check what oil i've bought.

Title: Gear Box oils
Post by: Rich_P on February 06, 2006, 10:26:37

Yeah, I was surprised.  But looking in the manual for the Series 2A gearbox, it needs GL4 spec.

Title: Gear Box oils
Post by: cjcarlos1977 on February 06, 2006, 13:48:22

Drained and topped up all the right places today. Mines a Series 3 1976. GL 4 is a lil hard to get hold off as everywhere seems to have GL5. But i found 10 litres of the stuff so grabbed them and off i went. Got some spare now which is handy.

Carl

( 1976 Series 3 )

Title: Gear Box oils
Post by: Rich_P on February 06, 2006, 14:02:26

I'm still looking for a supplier for a fair amount of EP90 GL4.  I need some, but can only find GL5 spec.  :(

Title: Gear Box oils
Post by: cjcarlos1977 on February 07, 2006, 21:45:42

Yes I had that problem aswell. Seems GL4 is a little rare these days. I walked into my local car spares shop and grabbed the last 5 litres of it, put it under my arm paid the fella behind the counter and ran like a girl home! Only to open up me shed to find...........yup a half full 5 litres tub in there!


Carl

Title: Gear Box oils
Post by: Miniman on February 08, 2006, 16:45:25

GL5 is a different spec, and is not 'backwards compatible' with GL4.

GL5 gear oil is a lubricant with very high extreme pressure performance needed for Hypoid gears where sliding and rolling contacts operate under very high loadings.  This is achieved by incorporating high concentration of sulfurized additives.  The downside to such high sulfur in oil is it tends to corrode yellow metals, so can ruin parts like brass synchronizers and some bushings.  So any equipment needing GL5 performance is designed taking this limitation of the lubricant into account.

GL4 oils are much more friendly to yellow metals, and so are used in equipment where such high load sliding-rolling contacts aren't present.  The designers of such equipment aren't as limited in the use of brass parts.  So the bottom line is that if your equipment calls for GL4 it probably doesn't need GL5 performance, and you may be asking for trouble down the line if you use a lube it wasn't designed for.

This is just so you know WHY.... Its good to know why.