Hardwiring Electronic Overdrive?
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Hardwiring Electronic Overdrive?
guys,
here is the problem, got an E40D Transmission and a 302 pushing out more horses and accelerating quicker than it is supposed to, overdrive on the selector will not trigger the electronic overdrive.
How do I Hardwire it to come on when I need it?
Oobical
here is the problem, got an E40D Transmission and a 302 pushing out more horses and accelerating quicker than it is supposed to, overdrive on the selector will not trigger the electronic overdrive.
How do I Hardwire it to come on when I need it?
Oobical
Fleet Owner
Joined: Aug 2005
Posts: 23,666
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From: Easton,Ks
Originally Posted by oobical
guys,
here is the problem, got an E40D Transmission and a 302 pushing out more horses and accelerating quicker than it is supposed to, overdrive on the selector will not trigger the electronic overdrive.
How do I Hardwire it to come on when I need it?
Oobical
here is the problem, got an E40D Transmission and a 302 pushing out more horses and accelerating quicker than it is supposed to, overdrive on the selector will not trigger the electronic overdrive.
How do I Hardwire it to come on when I need it?
Oobical
Mountain Pass
Joined: Dec 2005
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From: Dover AFB / Harrisburg PA
Not sure what you mean, the OD lockout button only prevents the shift into fourth when lit.
The wires go directly from the button and indicator to the PCM powered by fuse 17 if you have a '92+, so not sure what you want to hardwire it too.
Are the wires shorted where they come out of the shifter tube if you have a '92+?
Adrianspeeder
The wires go directly from the button and indicator to the PCM powered by fuse 17 if you have a '92+, so not sure what you want to hardwire it too.
Are the wires shorted where they come out of the shifter tube if you have a '92+?
Adrianspeeder
Mountain Pass
Joined: Dec 2005
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From: Dover AFB / Harrisburg PA
It looks like he has a '90, which would have the dash mounted OD lockout switch.
Reading yer post again, the OD lockout switch simply prevents the shift to fourth gear when acitivated.
Is yer truck not shifting into OD at all?
Adrianspeeder
Reading yer post again, the OD lockout switch simply prevents the shift to fourth gear when acitivated.
Is yer truck not shifting into OD at all?
Adrianspeeder
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not sure how many gears an E40D Transmission is supposed to have but what i was told it is a 4 speed transmission with an electronic overdrive gear mounted on the back. the truck shifts through all four gears but does not go into an overdrive, so i have to almost redline to do highway speeds. what i want to do is manually engage and disengage the overdrive. i just wanted to know if i can run a hot wire to a wire to have it come on by a switch.
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Fleet Owner
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From: Easton,Ks
Originally Posted by oobical
not sure how many gears an E40D Transmission is supposed to have but what i was told it is a 4 speed transmission with an electronic overdrive gear mounted on the back. the truck shifts through all four gears but does not go into an overdrive, so i have to almost redline to do highway speeds. what i want to do is manually engage and disengage the overdrive. i just wanted to know if i can run a hot wire to a wire to have it come on by a switch.
Sounds like you may have a bad TPS sensor.
Fleet Owner
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From: Easton,Ks
It sounds like you may also have a very low gear ratio, do you know what it is?
You do not have an electronic overdrive gear mounted on the back of the transmission.
They may have been talking about the transfer case for a 4X4.
You do not have an electronic overdrive gear mounted on the back of the transmission.
They may have been talking about the transfer case for a 4X4.
Last edited by subford; Apr 20, 2007 at 08:10 AM.
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well if that is the case, how do i gear up to go faster? i would even be willing to swap transmissions but i would need a direct bolt on transmission from another vehichle. i would like to have a 5 speed automatic. any ideas? and the transmission is geared for towing and the truck is not a 4x4.
Post Fiend
Joined: Mar 2002
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From: Bonita Springs FL
I don't think there's a 5 speed automatic that will bolt up.
This doesn't make sense to me:
Fourth gear *is* overdrive.
How many RPMs are you turning at highway speeds?
This doesn't make sense to me:
the truck shifts through all four gears but does not go into an overdrive
How many RPMs are you turning at highway speeds?
