change fluid auto box how do you find out oil temp

craig8661 · 17th October 2011, 14:15

reading the jatco instructions for the gear box oil change and one thing thats bothering me is how do you find out the oil temp in the gearbox with out draining any to see if its in tempreture range to add or allow the level to drop when full.

not doing my oil yet but plan on doing it in the next few weeks

baughurst · 17th October 2011, 14:32

Quote:

Originally Posted by craig8661

reading the jatco instructions for the gear box oil change and one thing thats bothering me is how do you find out the oil temp in the gearbox with out draining any to see if its in tempreture range to add or allow the level to drop when full.

not doing my oil yet but plan on doing it in the next few weeks

You use T4 to do it. I understand that those who have done this DIY drain the box, measure what came out and put back the same amount. I guess you pay your money and take your choice.

craig8661 · 17th October 2011, 14:45

one of the places that have t4 said they could not do the fluid change as there t4 needs a code to get information or privliges to use the t4 to do the oil change.

think i will leave the oil change until next year then as im not paying £100 for it to go onto a t4 to get that done as can get it done cheeper in notts

craig8661 · 17th October 2011, 14:46

other reason i want the right temp is that you cant be sure that whats drained of was the right level before

Singvogel · 17th October 2011, 15:37

Checking the temp is easy if you have a cheapo air conditioning service-man type thermometer.
They look a bit like a small meat thermometer (ask your wife) or see here:

http://www.ebay.co.uk/itm/AIR-CONDIT...#ht_4101wt_982

Mine has a little bigger dial and reads in C & F.

Just insert the probe in the filler hole of the gear box. These thermometers are pretty accurate and are very fast in responding. You'll get a steady reading in 10 - 15 seconds. No need to send loads of cash on a digital one made in China or Taiwan These are very robust.

Check the level at around 40 degrees C or 105 degrees F

Once you own one of these thermometers you'll find a hundred uses for it - just don't let your wife get her hands on it or you'll never see it again!

wuzerk · 17th October 2011, 15:41

I would dearly love somebody to tell me what difference in fluid level there is in the Jatco box between warm and the specified temperature? I refuse to believe that there would be a great deal of difference. In the three boxes on which I have done a fluid change I just drive for 10 miles afterwards and then check the level. I have had no problems. THE LEVEL PLUG IS ON THE BOTTOM. Do not undo anything on the sides of the box.

Singvogel · 17th October 2011, 15:51

Quote:

Originally Posted by wuzerk

I would dearly love somebody to tell me what difference in fluid level there is in the Jatco box between warm and the specified temperature? I refuse to believe that there would be a great deal of difference. In the three boxes on which I have done a fluid change I just drive for 10 miles afterwards and then check the level. I have had no problems. THE LEVEL PLUG IS ON THE BOTTOM. Do not undo anything on the sides of the box.

Good point wuzerk - I don't believe there can be that much of a difference either.

Good warning about not undoing any other bolts on side of the box. Apparently lots of folks think the filler hole is there - sadly no. You land up with no reverse gear and the box needs to be removed to fix it I believe. Horrors.

All the same for £4.95 post free you can get an American made thermometer that does the job and lots of others too.

ps I'm not selling them, or on commission - I just find them extremely useful and think that every toolbox should have one.

Matt1960 · 17th October 2011, 16:33

Quote:

Originally Posted by craig8661

reading the jatco instructions for the gear box oil change and one thing thats bothering me is how do you find out the oil temp in the gearbox with out draining any to see if its in tempreture range to add or allow the level to drop when full.

not doing my oil yet but plan on doing it in the next few weeks

The T4 will use resistances to measure the temperature of the box, but it is easy to do yourself with a multi meter across pins 7 and 8 of the gearbox connector by the battery.
The resistances are as follows:

1.7Kohm at 35c
1.16Kohm at 40c
1 Kohm at 45c

See connector details.

Hope this helps

Matt

craig8661 · 17th October 2011, 17:13

thats all good info given there does any one happen to have a photo of the drain plug and the fill level plug i def dont want to undoo the wrong bolt on this one

Singvogel · 17th October 2011, 17:35

You won't get much better than just google images for Rover Jatco Drain Plug / Jatco Filler Plug and Jatco Check Level Plug

Also check the LandyZone as they have lots of info re the Jatco box on there.

17th October 2011, 14:15	#1
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	change fluid auto box how do you find out oil temp reading the jatco instructions for the gear box oil change and one thing thats bothering me is how do you find out the oil temp in the gearbox with out draining any to see if its in tempreture range to add or allow the level to drop when full. not doing my oil yet but plan on doing it in the next few weeks __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

17th October 2011, 14:45	#3
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	one of the places that have t4 said they could not do the fluid change as there t4 needs a code to get information or privliges to use the t4 to do the oil change. think i will leave the oil change until next year then as im not paying £100 for it to go onto a t4 to get that done as can get it done cheeper in notts __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

17th October 2011, 14:46	#4
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	other reason i want the right temp is that you cant be sure that whats drained of was the right level before __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

17th October 2011, 15:41	#6
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	Auto box fluid I would dearly love somebody to tell me what difference in fluid level there is in the Jatco box between warm and the specified temperature? I refuse to believe that there would be a great deal of difference. In the three boxes on which I have done a fluid change I just drive for 10 miles afterwards and then check the level. I have had no problems. THE LEVEL PLUG IS ON THE BOTTOM. Do not undo anything on the sides of the box.

17th October 2011, 17:13	#9
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	thats all good info given there does any one happen to have a photo of the drain plug and the fill level plug i def dont want to undoo the wrong bolt on this one __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

17th October 2011, 15:37	#5
Singvogel Gets stuck in 75 CDT, 1966 2000TC P6, TD4-M47 Join Date: Oct 2011 Location: Deepest darkest Aberdeenshire Posts: 626 Thanks: 0 Thanked 3 Times in 3 Posts	Checking the temp is easy if you have a cheapo air conditioning service-man type thermometer. They look a bit like a small meat thermometer (ask your wife) or see here: http://www.ebay.co.uk/itm/AIR-CONDIT...#ht_4101wt_982 Mine has a little bigger dial and reads in C & F. Just insert the probe in the filler hole of the gear box. These thermometers are pretty accurate and are very fast in responding. You'll get a steady reading in 10 - 15 seconds. No need to send loads of cash on a digital one made in China or Taiwan These are very robust. Check the level at around 40 degrees C or 105 degrees F Once you own one of these thermometers you'll find a hundred uses for it - just don't let your wife get her hands on it or you'll never see it again!

17th October 2011, 17:35	#10
Singvogel Gets stuck in 75 CDT, 1966 2000TC P6, TD4-M47 Join Date: Oct 2011 Location: Deepest darkest Aberdeenshire Posts: 626 Thanks: 0 Thanked 3 Times in 3 Posts	You won't get much better than just google images for Rover Jatco Drain Plug / Jatco Filler Plug and Jatco Check Level Plug Also check the LandyZone as they have lots of info re the Jatco box on there.