Thread: Defender Driveline Cooling

even not towing, i wouldent touch mine, it gets very hot,

Just cruising down the highway @ 100km/h for 7-10km I've recorded gearbox temps over 75*C.

You can retrofit the oil cooler t/stat and lines onto an R380 in a Tdi with a little work.
The t/stat opens at 74*C so that'll give you an idea of how hot the gearbox gets (and t/stats aren't fully open for another 8* or so)

Originally Posted by rick130

Just cruising down the highway @ 100km/h for 7-10km I've recorded gearbox temps over 75*C.

You can retrofit the oil cooler t/stat and lines onto an R380 in a Tdi with a little work.
The t/stat opens at 74*C so that'll give you an idea of how hot the gearbox gets (and t/stats aren't fully open for another 8* or so)

I was thinking something along the lines of a cooler, what do you use to pump the oil through the cooler though?

V8 RRC's and Disco's and TD5's here all used a gearbox oil cooler on the LT77 and R380, as do the UK army Tdi's (with a whopping big cooler in front of the radiator)

All powered by the pump in the 'box

if you look at the upper left rear of the extension housing you'll see a by-pass pipe and cover.
This is removed and the t/stat housing bolts on with the cooler lines going forward.
Have a look under a TD5 and you'll see they use a fixed line that crosses over and goes up the driver side of the engine and back (no actual cooler/radiator up front as such, the lines do the job in this case)

Do a search, there's a few posts by me, Bush65, etc on the oil cooler and t/stat housing adapter.

Originally Posted by Jock The Rock

Gday

After towing about 2 ton at highway speeds on the weekend I leant under and touched the gearbox/transfer case

Both were mighty warm

I know you can fit these to a transfer case

Roverdrive Gear Corporation - Accessories

But is there anything for the gearbox, or will cooling the transfer case help to cool the gearbox?

Thanks

Just wondering how effective it would be to fit a second snorkle and plum it down to blow cool air around the gearbox/transfer case? may be another option, and one less oil line to leak. but again not sure how effective it would be.

Or you could use high temp fluids. Pat