The True R33 Gearbox Oil Capacity?

[_Scotty_]

I've just spent several hours searching to try and find the true fill capacity of an R33 gts25t manual gearbox, but at the end of it I'm still not sure. Some people say that service manuals\owners handbooks list 2.5-2.8L while others say that they use up to 3.8L before the oil comes out the filler hole. When I did my change today i measured the old oil and it was roughly 2.5L, so I filled it back up with slightly more then this. This left the level slightly below the filler hole. I doubt that the oil has been changed previously, so I'm almost definate that this is the correct amount, but given that so many people seem to be using more does anyone actually know the amount specified by Nissan?

While I'm asking, does anyone know the capacity and weight\grade Nissan specifies for the Viscous LSD?

[mega-power]

I've just spent several hours searching to try and find the true fill capacity of an R33 gts25t manual gearbox, but at the end of it I'm still not sure. Some people say that service manuals\owners handbooks list 2.5-2.8L while others say that they use up to 3.8L before the oil comes out the filler hole. When I did my change today i measured the old oil and it was roughly 2.5L, so I filled it back up with slightly more then this. This left the level slightly below the filler hole. I doubt that the oil has been changed previously, so I'm almost definate that this is the correct amount, but given that so many people seem to be using more does anyone actually know the amount specified by Nissan?

While I'm asking, does anyone know the capacity and weight\grade Nissan specifies for the Viscous LSD?

I know the LSD's are about 1.8L

Edited December 27, 2006 by mega-power

[MANWHORE]

Did you have the car flat? as in dead level?

I've managed to put 3.5-3.6L in. 3.8 is the correct amount assuming that every drop is drained.

[furryfrog]

2.5L sounds more like the MX7 (vlturbo) gearbox, given the car was flat as MANWHORE already stated.

how much more would it accept before it flowed out of the filler hole?

[_Scotty_]

I jacked the drivers side up to drain it, but I don't think it would have been enough to keep an extra 1L of oil in the gearbox. In fact I felt around the edge of the drain hole and couldn't feel any oil remaining. Did you measure how much oil you drained the first time you did it?

[WogsRus]

i did mine last week with the clutch, took 3.8 liters till it started to come out the hole.

[_Scotty_]

2.5L sounds more like the MX7 (vlturbo) gearbox, given the car was flat as MANWHORE already stated.

how much more would it accept before it flowed out of the filler hole?

Probably no more then 100mL.

[_Scotty_]

Well I've decided to try make sure it's right, i'm going to go raise it level now and drain it again to make sure the amount is correct.

[MANWHORE]

NO NO, don't drain it. hope i've managed to catch you in time.

Just jack it level, like have it on 4 stands. Then start filling it until it starts coming out of the filler hole ever so slightly (as in dont' pump it like crazy until it pours out of the hole).

Then, it'll be a good 3.5+L.

Do you have an rb25 box? or an rb20 box? if it's an rb20/rb30 box, they are substantially smaller and take approx 2ish L instead of the 3.8

Cheers

[MANWHORE]

Oh, I getcha, you wanna dump it and fill it again so you can find the total amount accurately. gotcha

[_Scotty_]

Yeah decided to find out exactly what the right amount is. But in the end the results don't really help! I drained out 2.7-2.8L so there was definately no more then 2.8L in there to start with. The car's done 75000kms, so it may have had a change in Japan, but then again it could be just as it left the Nissan factory. When I refilled it however it took about 3.7L to fill until it ran out the drain hole. At the end of the day I don't know which figure is correct, but I'm going to stick with the tried and tested method of filling to the fill hole.

[R33_Rob]

Sorry to hijack the thread, but where is the cap for the gearbox oil and where is the drail hole??

[_Scotty_]

The drain is at the bottom of the gearbox towards the rear, the fill hole is slightly above center on the drivers side. Both can be undone with a 1/2" drive ratchet or breaker bar.

[MANWHORE]

Rob, if you've never done it before, the bolts are quite tight.

I use a 42 cm breaker bar (just a small one), and apply careful force.

Be careful and use the bar the right way, so you don't smash your knuckles into stuff.

[MotoMan]

Just did mine on christmas eve.. took roughly 3.6lts and smelt sooooo bad

[T04GTR]

er34 gtt holts areound 4.2. hehe

[red_screamer]

my 20det box in holds about 2.7L but thats what the mechanic through work told me and what the gearbox bloke said to.. little more couldnt hurt