05-11-2020, 12:18 AM
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#1
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4lo and ECT
Does the ECT change the shift points in 4hi and 4lo as well or does it get overridden by the 4wd gearing?
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96 Stellar Blue Pearl Limited. 5VZ-FE. 290k. Auto. E-locker. Small lift.
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05-12-2020, 12:22 AM
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#2
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Quote:
Originally Posted by FrogginAround
Does the ECT change the shift points in 4hi and 4lo as well or does it get overridden by the 4wd gearing?
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Ect will work completely normal in 4hi. In 4lo there is no real way for it to “work” 4lo is geared so low that you really can’t get out of second gear. First gear is fairly short in these trucks also so the Ecu will shift to second before ect has a real chance to work.
If you don’t mind me asking what spurred the question?
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05-12-2020, 01:10 AM
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#3
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I don’t specifically remember 4 Lo, but in my 99 Auto the ECT button raised the shift points about 200 rpm. That’s it, nothing exciting.
Would be no use in 4 Lo.
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05-12-2020, 01:09 PM
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#4
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Avoid the 1-2 harsh shift in 4Lo...
Quote:
Originally Posted by FrogginAround
Does the ECT change the shift points in 4hi and 4lo as well or does it get overridden by the 4wd gearing?
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Not sure about '99s but those horrible 01-02s have the ability to start 4Lo in 2nd gear by simply putting the shifter into 2nd.
That avoids the harsh 1-2 shift that most 4Lo users encounter at about 8-9mph.
Now that's a Useful Feature!
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05-12-2020, 01:28 PM
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#5
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Quote:
Originally Posted by Tinigunner11
Ect will work completely normal in 4hi. In 4lo there is no real way for it to “work” 4lo is geared so low that you really can’t get out of second gear. First gear is fairly short in these trucks also so the Ecu will shift to second before ect has a real chance to work.
If you don’t mind me asking what spurred the question?
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I was just out on some forest trails this weekend and thought about how each of them changes the shift points. Then I started wondering if they could work together or if one cancels the other.
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05-12-2020, 01:29 PM
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#6
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Quote:
Originally Posted by jgue467
Not sure about '99s but those horrible 01-02s have the ability to start 4Lo in 2nd gear by simply putting the shifter into 2nd.
That avoids the harsh 1-2 shift that most 4Lo users encounter at about 8-9mph.
Now that's a Useful Feature!
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I have a 96 and that definitely have that 1-2 lurch.
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05-12-2020, 01:36 PM
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#7
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I do most of my driving with the ECT on. My 2000 had that 1-2 bump when in 4lo
HOWEVER ...now that I have my locker...I use 4low a lot less
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05-12-2020, 01:54 PM
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#8
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Quote:
Originally Posted by 3bears
I do most of my driving with the ECT on. My 2000 had that 1-2 bump when in 4lo
HOWEVER ...now that I have my locker...I use 4low a lot less
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How does that affect your mpg because I heard ECT impacts that a bit.
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05-12-2020, 02:29 PM
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#9
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Quote:
Originally Posted by camryn.samples
How does that affect your mpg because I heard ECT impacts that a bit.
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most of my driving is on gravel roads and hills/mountains so having the higher shift points is nice.
If and when I do hiway driving....more than 10minutes or so then ECT off would actually give you better MPG as it will kick into overdrive sooner
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2000 SR-5 Highlander version 4:30's, factory locker , green, bought 6/21
2001 SR-5... bought 11/20..sold 6/21....
2000 SR-5 moded, lifted, e locker, other cool stuff, totaled 10/20
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05-12-2020, 02:36 PM
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#10
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Quote:
Originally Posted by Dieselchessy
I don’t specifically remember 4 Lo, but in my 99 Auto the ECT button raised the shift points about 200 rpm. That’s it, nothing exciting.
Would be no use in 4 Lo.
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Ya that's kind of what i figured. Thanks.
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05-12-2020, 02:38 PM
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#11
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Quote:
Originally Posted by 3bears
most of my driving is on gravel roads and hills/mountains so having the higher shift points is nice.
If and when I do hiway driving....more than 10minutes or so then ECT off would actually give you better MPG as it will kick into overdrive sooner
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Good to know.
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05-12-2020, 07:29 PM
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#12
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The ECT button also works on a 5 speed!
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05-12-2020, 09:38 PM
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#13
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Quote:
Originally Posted by 3bears
most of my driving is on gravel roads and hills/mountains so having the higher shift points is nice.
If and when I do hiway driving....more than 10minutes or so then ECT off would actually give you better MPG as it will kick into overdrive sooner
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This!
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