Gear oil

[Lastman]

My clio 172 cup has developed a very stiff and sticky gearchange. This can sometimes crunch when changing gear quickly.

It doesnt appear to be a syncro mesh problem as it isnt consistent in any gear, and it only happens occasionally.

Clutch also appears fine.. (usual tests etc)

It has been recommended that I change the gear oil to fully synth 75/90 as the car has done 65000+. The standard oil is mineral based and probably way passed it's best.

Has anyone tried this out to cure a notchy box?

 

[Middo]

will be changing mine soon, but only to prevent further wear and tear from old / crappy fluid. asked edde what sort of different it would make, and he likened it to 'stopping it feeling like your stirring a pot of treacle' quite apt i reckon. probably worth changing it over before going onto anything else.

not sure what grade it uses, but ill be ordering some royal purple off demon tweeks for mine.

 

[edde]

As Middo says I've chnaged mine in both my cars the WIlliams didn't make much different as he box had quite new stuff in it the 75/90 Millers did make it a bit more mechnaicla less like stiring glue.

On the diesel it make more of a difference since the gear oil was 72k old so came out looking like crude oil and with a similar consistancy. Since the diesel is standard no quick shift you could give a better idea as to what it was and it feel mechnical again not like sloppy but its still no VAG/Honda gearbox.

75/80 is the offical stuff it takes about 3.5 liters. I 've used 75/90 along with many other people and its fine Millers stuff is very good I've used there engine oils a lot befoe and there superb stuff. Its not cheap £40 or so for 5 liters (shop round as Demon Tweeks want £44) But Royal purple is even better just its even more expensive at £50.