Thread: What oils

Penrite make a gearbox oil that meets the M2c-200c ford oil spec (I think thats the spec). Pro Gear 75w-90. Has anyone used this oil seeing that the Castrol BOT 130 seems very hard to obtain.

Originally Posted by skoller

Penrite make a gearbox oil that meets the M2c-200c ford oil spec (I think thats the spec). Pro Gear 75w-90. Has anyone used this oil seeing that the Castrol BOT 130 seems very hard to obtain.

I put penrite pro gear 75w-90 in gear box last service (about 3000 km ago), instant change in feel - for the better. I can get 1st gear when down shifting now, before I had to come to a near stop and force the gearstick.

Having read the penrite specs. I would say the only gearbox oil that is suitable for a Puma is Pro Gear 70W-75. Its gl4 spec so safe for the bronze synro rings.

Regards

John D - Defender 110 2.4

Originally Posted by jddisco200tdi

Having read the penrite specs. I would say the only gearbox oil that is suitable for a Puma is Pro Gear 70W-75. Its gl4 spec so safe for the bronze synro rings.

Regards

John D - Defender 110 2.4

Miles too thin.

The Getrag requires a 75W-90, and FWIW most all GL5's, and definitely those specced as a Manual Trans Fluids use buffered sulphur in the additive package so it's non-reactive.

Basically anything with a 1b copper corrosion number should be fine for any yellow metals, it's just that any fluid blended for transaxle use has to have the boosted EP package to look after the crown wheel and pinion in cars like Subaru's that use hypoid diffs combined with the gearbox.

There are a few commercially available 75W-90's that are only additised to meet the GL4 spec, eg Redline MT90 and one of Amsoil's brews (Castrol Syntrans M 75W-90 is too heavy IMO for most cars specifying a 75W-90 as it's up around 18-19cSt@100*C to suit Road Ranger 'boxes) but they are the exception rather than the rule.