TOD CODES, 14 and 24

[nfpgasmask]

OK, so I just changed both front and rear TOD speed sensors with hopes to get rid of the codes 14 and 24.

CODE 14 = Front Speed Sensor - Input abnormality (open, sig or com)
CODE 24 = Rear Speed Sensor - Input abnormality (open, sig or com)

Obviously, my transfer case fluid was changed, and I was able to clear the TOD trouble codes by going through the steps in the manual, however the flashing comes right back as soon as I start up like normal, my TOD does not work, and I get codes 14 and 24.

Anyone else have this problem? In this thread:

http://vehicross.info/forums/showthread.php?t=21714

The OP states that the problem was the Transmission output sensor (OSS). He said he replaced this and it fixed it. But what is the Transmission Output Sensor? Obviously it is not the front or rear speed sensor, so what sensor is he talking about? Is it something in the transmission or another sensor in the xfer case?

Thanks- Bart