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Old January 27th, 2011, 03:35 PM   #1
deathbypsi
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1350e wont engage 4low

Ok this is a problem I created so Im looking for some help.

My 90 Bronco2 had a stock 2.9/a4ld/1350e drivetrain in it up till a few weeks ago. I swapped in a complete 87 spec Mustang efi 5.0, made my own harness so everything looks and works as if were factory.I also put in a built C4 and I reused the original 1350e t-case.I wanted to keep the same t-case just for the fact that I like the push button setup to keep it looking stock and I have many spares.
Now I can push 4high at anytime and it will engage no problem , but when I try 4low the button just flashes. My c4 doesnt use any kind of VSS so Im wondering if that is what the 4wd module is looking for or could it be something else from the a4ld it needs to read to engage low gear?

ANy help would be greatful!!
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Old January 27th, 2011, 04:13 PM   #2
CheapThrillB2
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The Borg-Warner 13-50 electronic shift transfer case transfers power from the transmission to the front and rear axle assemblies when electrically actuated by either of the two switches mounted in the push-button control panel. The electronic control module will analyze information from the transfer case shift position sensor to verify its current position. The electronic control module also analyzes input information from the speed sensor and the clutch interlock switch (M/T) (or neutral safety switch (A/T) depending upon transmission application). When all conditions are met, the electronic control module will command the electronic shift motor to execute the desired function. After the shift occurs and the motor is turned off, the electronic control module resumes looking at the inputs from the shift position sensor to determine if the transfer case is in the position selected by the operator. The electronic control module illuminates the push-buttons in the control panel indicating that the desired function has been completed.

Last edited by CheapThrillB2; January 27th, 2011 at 04:18 PM.
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Old January 27th, 2011, 09:25 PM   #3
deathbypsi
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I made this same post over on Pirate4x4 an was told I just need to ground the red/white NSS wire that came from the a4LD. Will be trying in the morning. This should just overide all the crap the module needs to see and I will have to becareful when switching to low gear since it wont need to be stopped anymore.
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Old January 27th, 2011, 09:29 PM   #4
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That's the nuetral signal wire. Module needs to see nuetral and brake signal before going into low.
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Old January 27th, 2011, 10:17 PM   #5
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Shit I forgot about the brake signal....
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Old January 28th, 2011, 11:53 PM   #6
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All good now! In the grey plug under the overflow tank is the red/white wire that use to run to the NSS on the a4ld. I just removed that pin from the plug and grounded it to the fender and now it goes right into 4low.

I also discovered I forgot to plug the VSS back in when I put the T-case in.Not sure if this was affecting anything or not but its plugged in now.
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