Simon's new Xantia V6 and Leaf blog

Tell us your ongoing tales and experiences with your French car here. Post pictures of your car here as well.

Moderators: RichardW, myglaren

User avatar
Donor 2021
Posts: 7219
Joined: 11 May 2019, 17:56
x 2046

Re: Simon's new Xantia V6 and Leaf blog

Post by mickthemaverick »

Have you had a chance to strip down the original box yet Simon? We are all wondering what had happened! :)
User avatar
white exec
Moderating Team
Posts: 7331
Joined: 21 Dec 2015, 13:46
x 1432

Re: Simon's new Xantia V6 and Leaf blog

Post by white exec »

A good few vehicles have used ATF-type lubrication for manual gearboxes. Products like Syntrax and Syntrans were classed as Manual Transmission Fluids, after difficulties were found changing gear in cold weather with traditional gearbox oils, back in the '80s.

Added friction additives (!) aside, to make sure that synchromesh mechanisms worked properly (similar to current GL-4 / GL-5 considerations), light gear oil and heavy duty running are not mutually exclusive - Castrol once explained to me that they specified Castrolite (light oil) for some HGV and transporter applications, because of the inherent shear strength.

No synchro in your reduction box, so presumably a wide choice of lubricants. The oil of choice in the highly-loaded Rover V8 5-speed manual box evolved iirc from 75W90, to 75W80, to ATF, to MTFs as they became available.