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Old 05-13-2019, 07:45 PM   #151
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(for a 4R100 trans) The 2wd van transmission has an Output Speed Sensor that reads 3 pulses/revolution of the output shaft

The 4wd truck parts in the trans uses the same sensor but the reluctor wheel (aka tone ring or sensor wheel) has 18 teeth so 18 pulses/rev

For a van with stock tires and stock gearing, that correction factor would be 3/18 or 0.1667.

The ERA is just converting the number of pulses to make the van happy. .1667 is a good starting point but when you change tire sizes, you can get a closer correction factor using math. Think in terms of output shaft revs and tire revs per mile.
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Old 05-13-2019, 09:48 PM   #152
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Originally Posted by mgmetalworks View Post
(for a 4R100 trans) The 2wd van transmission has an Output Speed Sensor that reads 3 pulses/revolution of the output shaft

The 4wd truck parts in the trans uses the same sensor but the reluctor wheel (aka tone ring or sensor wheel) has 18 teeth so 18 pulses/rev

For a van with stock tires and stock gearing, that correction factor would be 3/18 or 0.1667.

The ERA is just converting the number of pulses to make the van happy. .1667 is a good starting point but when you change tire sizes, you can get a closer correction factor using math. Think in terms of output shaft revs and tire revs per mile.
Thanks again for your help as always.
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Old 05-14-2019, 05:41 AM   #153
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For my understanding just so I get this correct. The van comes with a mechanical VSS and the new Truck 4x4 transmission adapter to transfer case uses a pulse VSS. So I need to order a Electronic Ratio Adapter from Ujoint?

Thanks for all your help
Pretty sure UJoint wonít sell it to you. You can order it from Abbott in the link I provided earlier.
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Old 05-14-2019, 05:43 AM   #154
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I have my Van at the transmission shop and they are asking how you guys are doing the VSS? Speed sensor. I did a quick search and didnít find anything. Iím out of town so any help will be appreciated.


I used the box from Dakota digital. Just splice it in-line with the speed Sensor, and I used an app on my phone to get my speed and the box has +/- buttons to adjust the speedometer until it matches the speed the app shows.
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Old 05-14-2019, 07:22 AM   #155
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Pretty sure UJoint wonít sell it to you. You can order it from Abbott in the link I provided earlier.

Youíre right. I emailed Chris at Ujoint Off-road to order the ERA and a shifter kit and he said he no longer sales them to members to complete other peopleís kits.
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Old 05-14-2019, 07:55 AM   #156
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Youíre right. I emailed Chris at Ujoint Off-road to order the ERA and a shifter kit and he said he no longer sales them to members to complete other peopleís kits.
Sounds like a missed business opportunity for him! Not like he's the only one selling the device.
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Old 05-14-2019, 07:57 AM   #157
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I just ordered the Electronic Ratio Adapter ERA directly from Abbott they are very easy to work with and they know what we are doing and pre program it to be close right out of the box. Thanks to everyone on here for all your help.
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