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2 questions:

Is the 4WD ECU VIN locked or can one be pulled from a junkyard and used?

With all the talk of the Sequoia front driveshaft has anyone looked at the Sequoia rear shaft to see if that fits either tundra configuration?
 

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2 questions:

Is the 4WD ECU VIN locked or can one be pulled from a junkyard and used?

With all the talk of the Sequoia front driveshaft has anyone looked at the Sequoia rear shaft to see if that fits either tundra configuration?
1) Nope. My 4WD ECU was from the same vehicle as the T-case though I still don't believe they are, I'm sure @ViktorG can confirm.

2) The Sequoia rear drive shaft is too short.
 

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Discussion Starter #263
Yeah, either a new or used 4WD ECU can be used and it does not need to be paired to the vehicle in any way.
 
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Discussion Starter #265
I've made a little video of the synopsis of the conversion and the 5 modes of the transfer case operation for anyone interested:

 

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This is an awesome MOD. I just completed my AWD conversion on my 11' CM....Love it. I am having trouble getting the CDL switch back light and indicator LED light to illuminate. The switch activates the Center Diff perfect.

Any help or suggestions would be greatly appreciated.

I wired the CDL switch.....
#6-Ground
#7-neg
#8-positive
#9-4WD ECU pin #12

Per other post on this thread I taped into a positive (green) from another switch in the dash and a yellow (negative) from the another switch.

The only difference with my truck is it has a bench up front with a column shift lever so the Tow/haul switch is not easy to get to.....not sure if the coloring is consistent with other switches in the dash.
 
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Discussion Starter #267
This is an awesome MOD. I just completed my AWD conversion on my 11' CM....Love it. I am having trouble getting the CDL switch back light and indicator LED light to illuminate. The switch activates the Center Diff perfect.

Any help or suggestions would be greatly appreciated.

I wired the CDL switch.....
#6-Ground
#7-neg
#8-positive
#9-4WD ECU pin #12

Per other post on this thread I taped into a positive (green) from another switch in the dash and a yellow (negative) from the another switch.

The only difference with my truck is it has a bench up front with a column shift lever so the Tow/haul switch is not easy to get to.....not sure if the coloring is consistent with other switches in the dash.
The green and yellow wires for illumination apply ONLY to the tow/haul switch.
Other switches all use different color wires.
On the tow/haul the green is ill+ and yellow is ill-, but some other switches have yellow as ill+ etc.
Let me know which switch you are tapping into and I'll tell you the wire colors for the illumination circuit.
 
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The green and yellow wires for illumination apply ONLY to the tow/haul switch.
Other switches all use different color wires.
On the tow/haul the green is ill+ and yellow is ill-, but some other switches have yellow as ill+ etc.
Let me know which switch you are tapping into and I'll tell you the wire colors for the illumination circuit.
Thank you ViktorG! I was able to find the appropriate wires.....now it works perfect.
 
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Do you know what the options are for a 2018 Tundra upgrade? Do the newer Sequoias have the same transfer case and swap capabilitie?
 

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Do you know what the options are for a 2018 Tundra upgrade? Do the newer Sequoias have the same transfer case and swap capabilitie?
This can not be done on 2014 or newer trucks. The T-cases are completely different. The Sequoia still uses the same T-case as the 2007-2013 Tundras, that's why it works.
 

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I was planning on doing this tomorrow, but I noticed that my sequoia t-case has a crack in the plastic for an electrical connection.
Should I be concerned about this - or can I just seal it with epoxy and be good to go?
 

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Discussion Starter #272
I was planning on doing this tomorrow, but I noticed that my sequoia t-case has a crack in the plastic for an electrical connection.
Should I be concerned about this - or can I just seal it with epoxy and be good to go?
Epoxy that thing
 

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I was planning on doing this tomorrow, but I noticed that my sequoia t-case has a crack in the plastic for an electrical connection.
Should I be concerned about this - or can I just seal it with epoxy and be good to go?
Epoxy that thing
I was going to say the same thing, then go back as soon as you can with some dielectric grease and put it in the connection. Maybe go back after some wet days to give it a check until you're satisfied that moisture isn't getting in there.
 

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I just picked up my modified driveshaft and new seals.
for the sequia transfer case - do I need to use gear oil with a traction modifier?
 

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I just picked up my modified driveshaft and new seals.
for the sequia transfer case - do I need to use gear oil with a traction modifier?
No, just 75w90 oil without any friction additive
 
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Discussion Starter #280
I have a problem and need help.

Pin 14 on the A25 connector for the 4wd ECU already has wire in it.
not sure what to do - splice or replace?

Truck is 2010 5.7 4wd double cab SR5
You splice the ground side of the centre diff lock indicator LED into it
 
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