Thread: oil temp guage for ZF auto

Originally Posted by walker

Who has installed a temp guage of the auto on their Range Rover? If you have where did you install the sender and what sort of temp does it run at normally?

I was hoping their was a place for a screw in sender but I am thinking you might have to use an inline one.
I was also just going to use a speco oil temp guage like I have for th engine oil temp but I was not sure of the running temp.


Any other help or suggestions would be appreciated.


thanks,

Adam

There is a temp switch at the bottom of the radiator on the auto lines to the radiator hot side. You can remove the original switch and fit a sender unit, but you may need to adapt the threads. Cant remember what size it is off the top of my head. Be careful what sender you put in or try to match up one that matches the profile of the switch or you run the risk of blocking the flow if its too big.

Originally Posted by dck7aok

silver solder a tee piece into the line and fit where you like. Preferable to use hot line.....from high side of oil pump.

Silver solder????? On a 200psi line??????? Errr no thanks.......

Thanks but original oil cooler has been thrown out but I dont remember any temp switch being their. But it will be al custom hoses s the cooler will be on the bck of the Rangie (ute).

Also, the auto does not run at 200psi, it runs a fair bit lower than that. I always thought it was very high pressure, but even the electronic HP24 only runs at max 150psi when locked up.

My existing transmision lines have the flexible hose held onto the steel pipe with just hose clamps, so from that am guessing pressure is fairly low.

Originally Posted by walker

Thanks but original oil cooler has been thrown out but I dont remember any temp switch being their. But it will be al custom hoses s the cooler will be on the bck of the Rangie (ute).

Also, the auto does not run at 200psi, it runs a fair bit lower than that. I always thought it was very high pressure, but even the electronic HP24 only runs at max 150psi when locked up.

My existing transmision lines have the flexible hose held onto the steel pipe with just hose clamps, so from that am guessing pressure is fairly low.

4HP22 runs at nominal test pressure of 150psi @ 2000rpm. Was close, but even this is too high for silver solder.
The original oil cooler is in the radiator tank, not separate. This then feeds into the external oil cooler tube mounted on the front.
The external cooler doesnt have the ability to sufficiently cool the fluid being air to liquid, so it goes into the radiator first to remove most of the latent heat.
It may be a year thing as to whether you have the temp switch in line to the radiator, but AFAIR all ZF fitted Rangies had this setup.

Hi Walker,

These guys seem to know what they're doing:

Wholesale Automatic Transmissions

cheers, DL