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BruceLambo · 12-22-06, 03:27 PM

Im putting a cooler on my R21T box as well. I havent decided on a place to mount the pump yet. The cooler is to one side of one radiator (lambo has 2). The air is ducted to go out via the engine bay.

My takeoff point for the oil is not in the oil drain hole but in a new hole I put in on the other half of the case. as the case is around 5mm thick, I needed more 'meat' to secure the output to. I welded a 3mm plate onto the back of the area of the hole and then run the NPT tap into that.
For the return, I done the same with the hole, eg: 3mm plate and tapped. My position for this was on the rear gearchange/5th gear cover. The inlet is aimed directly at the 5th gear, as this is the most stressed gear in the box. The theory is for the cool oil to run from one end of the box to the other.
I am currently looking at a place around the crownwheel area so I can spray cool oil directly onto the crownwheel (via a 't' junction from the pump).
The only other thing will be a temperature sender mounted in the differential area.

12-22-06, 03:27 PM	#6 (permalink)
BruceLambo RamboLambo A Tenth Join Date: Feb 2002 Location: Whangarei NZ GT40: Whangarei New Z Posts: 193 Rep Power: 8	Re: R21 Gearbox cooler Im putting a cooler on my R21T box as well. I havent decided on a place to mount the pump yet. The cooler is to one side of one radiator (lambo has 2). The air is ducted to go out via the engine bay. My takeoff point for the oil is not in the oil drain hole but in a new hole I put in on the other half of the case. as the case is around 5mm thick, I needed more 'meat' to secure the output to. I welded a 3mm plate onto the back of the area of the hole and then run the NPT tap into that. For the return, I done the same with the hole, eg: 3mm plate and tapped. My position for this was on the rear gearchange/5th gear cover. The inlet is aimed directly at the 5th gear, as this is the most stressed gear in the box. The theory is for the cool oil to run from one end of the box to the other. I am currently looking at a place around the crownwheel area so I can spray cool oil directly onto the crownwheel (via a 't' junction from the pump). The only other thing will be a temperature sender mounted in the differential area.