EscortCosworthUSA

Howdy -

I bought a quaife MT75 dogbox (real deal one with the strengthened casing) -

Question - Where the std box reverse gear sensor spot, there is a blanking plate with too holes/fitting. One is blocked off and the other is open (I assume for a breather), but oil is coming out pretty good even with a hose on it.

Should these holes be blocked off? Is there a need for a breather for the gearbox side? - I know the centre drive side has a breather.

Also what kind of oil and amount (is it different from the 1.2 liters of the std box)? Right now I use synth ATF in the box and centre drive.

Cheers!

markk

iTrader: (2)

if the box has been properly sorted the transfer and teh maincase should share the same oil, and yes i always run a gearbox/diff oil breather catch/return tank setup.

ian sibbert

We used to struggle with the MT75 dog box and oil retention due to the breather and type of oil...we ended up I think using atf...but it needs a decent breather, piped to a breather bottle quite high in the engine bay and vented to atmosphere....

Ian

EscortCosworthUSA

thanks - thats kinda what I figured, I'll run a line to the engine bay and get a breather bottle setup.

So ATF is the way to go oil wise and stick with the normal 1.2 liters?

Still strange that the breather port is located there, seems low in comparison to the gears in the box.

I don't think the dox and transfer case are mono-oiled either.

cossie4i+

iTrader: (15)

Why don't you email quaife ?

Im sure they will advise you

Steve.

ian sibbert

AFAIK the 3 and 6 tooth dog boxes we have had were a standard bell housing, strengthened centre case (to accept the quaife cluster), quaife linkage and stick and standard transfer box....transfer box was still a seperate entity.....


Ian

gearboxman

I personally don't like the shared oil set-up, which I've generally only seen on DPE builds.

Don't run auto fluid in the gearbox either! Quaife recommend full synthetic 75W/90.

Breather bottle up under the bonnet is the norm

markk

iTrader: (2)

what is the problem with the shared oil setup bernie ? i would have thought this would be better on the whole.

EscortCosworthUSA

thank you thank you!!!

will get a bottle setup and put some synth 75w 90 oil in it right away!

gearboxman

Too much potential for all of the oil to end up at one end

Holes drilled under the highest load spot in the casing

Damo V

Interesting thread

markk

iTrader: (2)

fair point