Gearbox oil for manual transmission
 

Hi-any recommendations on what gearbox oil to get for a manual ?

MTF 94.
Car lube used to do it, as well as others.


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Or there’s this stuff, that I don’t know anything about, other than it states MTF 94.

https://rover.ebay.com/rover/0/0/0?m...2F372159670029


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Also, there's the MGR branded supply.

https://rimmerbros.com/Item--i-VYK000010

ebay less then £10 with free postage

macafee2

LINK

Brian :D

Thanks for the Link, Brian! How much oil is needed for an oil change on a manual gearbox(diesel)?

I don't have any noticeable problems with my gearbox, but then again, I have no idea if the oil has ever been changed! I am guessing that changing it might be a good idea?

Manual transmission oil change from dry is 1.6 litres drain & refill is 1.4 litres, remember make sure you can undo the filler nut first before draining other wise if you can not and drain out the oil you will be in a world of pain if the filler nut/screw will not come out.

It used to be --fill to the bottom of the filler hole.---:shrug:

Not so, I guess, with the R75 box.

I just topped mine up to the fill hole after changing the clutch - as every other car. Only needed 100ml or so.

PS - couldn't get the drain plug out with the correct sized tool - someone else had previously rounded the star hole. The filler took a lot of force, but the tool fitted the plug properly. So all I could do was top up.

The holes in the plugs on mine were for an allen key.

Came out very easily. Haynes manual says fill till the oil is just about to run out of the filler hole.

The reason I was curious was because, with the car on level ground, I got best part of two litres into mine.---Very strange.---:eek:

Hmm...have read conflicting views on the gearbox oil change. Some say DO NOT do if you're not having any problems; that's the advice my local mechanic gave me too, when I enquired about having it done this week.

I still haven't done it, although I bought 4 or 5 litres of the oil last month! I know I will only need 2 litres, but the bigger container was a bargain price! :)

So, what to do? My car has done 150,000 miles, and the previous owner did not change it, don't know before that. What is the downside to not doing it? I think, but cannot find it now, the gearbox oil should be changed every 90,000 miles...anyone care to enlighten me with their opinion/knowledge?

An oil change prevents problems from occurring. If problems become noticeable on a manual box, it is usually too late to correct them with an oil change.

Even with auto boxes, where the advice is often to leave well alone, the manufacturers now include an oil change at a certain mileage e.g. Mercedes. Also, the best practice adopted by the likes of Jaguar specialists on ZF autos is to use a machine that replenishes the oil with the gearbox being operated in order to remove all traces of the old oil from the torque converter.

I would always go with the view that one should do gearbox oil changes but only if it is going to be done properly and with the correct oil. Otherwise, take the risk of not doing it. If a mechanic advises not to change the oil on a gearbox, I would look to change the mechanic!

I think the general rule that not to change it unless you're having trouble isn't the best, and not the first time I've heard it.
Personally I'd say if you're having problems it's probably to late!
BMW Automatics a case in point, they were sealed! No drain plug fitted.
Sorry, but no oil lasts forever

Mines had it's changed every 4 years since it was new, so it's another job I need to add to the sunny-day list ;)

Thanks for the replies - I will go ahead as planned, and have it changed. Makes sense.

Normally when they say not to change the oil, they're referrring to a flush. But even then, that too could only cause problems on gearboxes/transmissions that already have problems by flushing out debris that was masking the issue already present. Changing the oil on a good gearbox will never hurt.

I have changed the oil in the gearbox and found (subjectively) that the shift was smoother.

Follow the official MGR service schedule and you won't go far wrong. ;)

Earlier schedule states to replace the manual gearbox oil at 90k miles or 6 years, whichever comes first, and the later schedule extends that to 105k miles or 7 years.

I use the earlier schedule, but each to their own. :}

And don't forget that MGR never intended for our cars to be on the road 20 years later. That wouldn't be good for business!
The Jatco autos really do benefit from a drain and fill occasionally. I would do a partial change on my Freelander's auto box every year and it made a big difference in driveability.
As for MTF94 Ravenol also makes oil in that grade. Theirs isn't cheap though!