gearbox oil

[billycan]

can anyone tell me the correct grade and quantity of gearbox oil I,ll need to replace mine it,s a 2004 2.7 tdi- local motor factors place recons it,s 3.5 litres of 75/90 gl4 or5 but iam sure I,ve read on here its more like 7 litres of 75/90 gl4 only

 

[firebobby]

GL4!!!, is a must, not GL5

 

[quixote]

Yep, GL4. EP80W-90 :thumb2

http://www.commaoil.com/products/results/91010357/vm

 

[arcascomp]

I'm fairly sure that for our cooler climate we should be using EP75-90, as 80-90 is a bit too thick, and can make getting into gear that little bit harder.

 

[Banshee]

I'm fairly sure that for our cooler climate we should be using EP75-90, as 80-90 is a bit too thick, and can make getting into gear that little bit harder.

I've also heard this, in fact the local motor factors have recommended the same thing when I went in to price some up as that's the only fluids I've not changed since owning the car

I've also heard that overfilling slightly helps with any rattles and premature wear of the lay shaft bearings or have I made that up? :nenau

 

[rustic]

I've also heard this, in fact the local motor factors have recommended the same thing when I went in to price some up as that's the only fluids I've not changed since owning the car

I've also heard that overfilling slightly helps with any rattles and premature wear of the lay shaft bearings or have I made that up? :nenau

Yep... some of us have put a little extra in, we believe that the front bearing on the lay shaft is sometimes starved of oil.
I also put some molyslip in, which reduces wear, and helps to reduce gearbox noise. It also stays in place and protects the gearbox even if there is no oil...
So they say...:augie

I had a slight gear noise as you use gears to slow down at roundabouts, that was a fair few years ago probably approx 6 years.. it stopped that within 20 miles of putting it in.

It doesn't work in all cases, IP caught mine early, and still on the original box.

 

[Banshee]

Yep... some of us have put a little extra in, we believe that the front bearing on the lay shaft is sometimes starved of oil.
I also put some molyslip in, which reduces wear, and helps to reduce gearbox noise. It also stays in place and protects the gearbox even if there is no oil...
So they say...:augie

I had a slight gear noise as you use gears to slow down at roundabouts, that was a fair few years ago probably approx 6 years.. it stopped that within 20 miles of putting it in.

It doesn't work in all cases, IP caught mine early, and still on the original box.

Is it an easy change mate?

I can see the drain plug but cant see where it has to be filled up from

 

[bry]

Filler plug is on the outer side,further up.Be sure to loosen this first before the drain plug.You need to be sure you can fill it back up.

 

[AlexD333]

my gear changes whurrr away when i change from acceleration. im just gonna wait for it to eventually die then perhaps look into a 6 speed box :sly

 

[Banshee]

my gear changes whurrr away when i change from acceleration. im just gonna wait for it to eventually die then perhaps look into a 6 speed box :sly

I've often though about a 6 speed box on my Maverick but not sure how it would fare power wise? Is there a 6 speed bolt on replacement for them?

 

[Paff]

my gear changes whurrr away when i change from acceleration. im just gonna wait for it to eventually die then perhaps look into a 6 speed box :sly

So what's this got to do with the gearbox oil topic? :nenau

:augie

 

[firebobby]

So what's this got to do with the gearbox oil topic? :nenau

:augie

Gearbox :doh, that's quite an easy slip on this site, sometimes threads will go off on one, in a totally different direction :lol

 

[Banshee]

Just to pick up on this one again

I've just rang the car spares who are ordering me in a bottle of Comma 5l 80w-90 GL4, I've been told to overfill slightly but don't know the capacity of the gearbox on my 96' 2.7TDi

He only has 1 1l bottle of GL4 in stock, an old Granville one, should I really be mixing?

 

[AlexD333]

Not if you can help it.

I wouldnt want to anyway. Sometimes different additives can mix badly or so ive been told. :thumb2

 

[arcascomp]

Wrong oil mate, you want 75-90 anyway!

 

[Banshee]

Crap!!!!!!!!!!!!!!!

He's ordered that in especially as well :doh

Will it do any damage putting 80/90 in instead of 75/90?

 

[arcascomp]

Doubt it - I have a funny feeling that it's supposed to make 1st gear a little harder to engage in winter especially - can be used to flush her through if need be! You're up this way next month aren't you? I have about 5L of 80-90 GL4 sitting here that I mistakenly ordered, you're welcome to it if you want it.

 

[Banshee]

Doubt it - I have a funny feeling that it's supposed to make 1st gear a little harder to engage in winter especially - can be used to flush her through if need be! You're up this way next month aren't you? I have about 5L of 80-90 GL4 sitting here that I mistakenly ordered, you're welcome to it if you want it.

I think we've scrapped the idea off now mate, would love to come up this year but funds are a bit tight by the look of it.

I've got some coming to the car spares shop tonight that I've got to pick up after work

 

[quixote]

I have a funny feeling that it's supposed to make 1st gear a little harder to engage

That makes sense. I recently refilled my gearbox ('04 3litre) with the specified heavier grade & immediately noticed 1st gear was slightly harder to engage than before the oil change :nenau

As for refilling the box? I ran a short length of hosepipe from the engine bay to the filler hole & poured the oil in through a funnel. Made life a damn sight easier :thumb2

 

[glanrichbex]

Thicker oil is not good for your gearbox.

Why is there so much oil in the gearbox, surely half a pint is enough to go round the whole gear train or even use grease?

Have you noticed how hot the gearbox gets?

it's not heat from the engine, it is heat generated by the friction of the moving components within. The oil plays a very important part as well as lubrication, it is a medium which removes and distributes heat from the moving parts to the outer case. Alot of the moving parts are not actually running in the oil but rely on splash caused by the movement of various sections of the geartrain. Thicker oil does not splash very well, especially in cold weather.

Bearing races have poor oil retention so the fact the oil is thin means the heat is removed sufficiently by a small flow to keep that bearing running within specification.

If the oil is thicker than specified - it means the oil is more viscous and so not moving as quickly through the bearing, this causes more heat build up, you may even be starving it of oil and so increased wear. If a bearing gets excessively hot the tempering on the surfaces of the race and rollers can be lost and will become soft, this will cause bearing failure.



It's easier to just go with the manufacturers spec. :thumb2