Monday, Nov 19, 2012 at 07:21
I use litres/100km, so for the sake of an easy comparison, 4.3 km/litre is 23.5 litres/100km.
This is a post I put on the Factory
Forum which I'll re-post here:
BEING KIND TO YOUR LC200 GEARBOX (and your wallet).
I just had my Scangauge upgraded so it could display the Transmission Fluid Temperature (TFT). If you recently purchased a Scangauge it will display TFT after you enter the appropriate parameters, but older ones, like mine, need to be upgraded.
Image Could Not Be Found
If you haven’t got one, you can buy them here:
Site Link
The parameters to enter are:
TXD: 07E121D9
RXF: 032100000000
RXD: 2808
MTH: 00010001FFD8
NAM: TFT
We just spent a few days out in WA’s north east wheatbelt exploring the granite rock outcrops with two other BT owners and I took the opportunity to experiment by driving to keep the temperature of my transmission fluid low.
It is a real education and flies in the face of my long held belief that low revs/tall gear were best for touring, economy and kindness to the vehicle.
Toyota recommends towing in S5. Driving in Sports mode allows the Torque Converter to lock up, given the right circumstances. It won’t lock up in Drive (D).
Now I prefer to drive at about 90kph. If I drive at 90 in S5, the TC will not lock up and the Scangauge shows these approximate figures:
RPM: 2300
L/100kms: 24
TFT: 85 to 90°C
However, if I drive at 90 in S4, the Scangauge shows these approximate figures:
RPM: 2200
L/100kms: 18
TFT: 60 to 65°C
18 litres/100km is 5.6 km/litre.
That is a real fuel saving and is being very, very kind to your transmission.
In the case of the 17000km trip referred to in the post above, using $1.50 per litre, that's a saving of $1275, and that's a conservative cost per litre.
Can readers double check those savings, I've had the calculator out twice and my head is hurting....
The only way I can get similar good figures in S5 is to speed up to about 100kph where the TC will lock. But I find that uncomfortable touring and it is very hard to keep the TC locked at that speed. Any slight incline or headwind will unlock the TC in S5.
The really interesting thing is that changing down (from S5, TC unlocked, TFT at about 85°C) to S4, you can see/feel the TC lock by the RPM dropping about 200 revs, the TFT readout drops very quickly to about 60°C, within a minute actually. And the fuel consumption improves by about 5 or so L/100kms.
So I think most of my towing will be in S4 from now on, and my Cruiser will thank me for it.
AnswerID:
585018
Follow Up By: G & J - Monday, Nov 19, 2012 at 18:05
Monday, Nov 19, 2012 at 18:05
Stephen.
Thanks very much for posting that information.
It is great data for us 200 series owners.
Regards Geoff
FollowupID:
854769