VSS going haywire on new/rebuilt Transfer Case/Tranny

[no cigar]

Hey guys, just finally getting my truck back out on the road yesterday when it definitely was having a major problem. The transmission was acting very bizarrely - shifting only into 2nd and downshifting back into first on application of throttle. In addition to this, the transfer case fuse blew on the first start, as well as the speedometer going absolutely nuts, and the ABS light coming on. The trans is a Jasper Level 1 and the Tcase is a fresh rebuilt NP246 w. auto trak.

Everything I've seen points to VSS problems. This Tcase was a fresh rebuild that apparently didn't use new VSS. The thing I'm wondering is if I may have gotten the two rear sensor wires crossed and plugged into the wrong sensors as there seems to be a left and a right - in addition to the one on the front. Any thoughts on how to OHM out those sensors to test them? Any other suggestions appreciated.

Also what's the word on this behavior ruining a brand new transmission? I limped the truck to the gas station and back and didn't beat on it at all. Tried to get into neutral where I could to let it coast etc. It was about a 4 mile trip round trip.

Thanks!

 

[exp500]

VSS would be frequency, maybe your meter can see it as ACV.

 

[swathdiver]

Hey guys, just finally getting my truck back out on the road yesterday when it definitely was having a major problem. The transmission was acting very bizarrely - shifting only into 2nd and downshifting back into first on application of throttle. In addition to this, the transfer case fuse blew on the first start, as well as the speedometer going absolutely nuts, and the ABS light coming on. The trans is a Jasper Level 1 and the Tcase is a fresh rebuilt NP246 w. auto trak.

Everything I've seen points to VSS problems. This Tcase was a fresh rebuild that apparently didn't use new VSS. The thing I'm wondering is if I may have gotten the two rear sensor wires crossed and plugged into the wrong sensors as there seems to be a left and a right - in addition to the one on the front. Any thoughts on how to OHM out those sensors to test them? Any other suggestions appreciated.

Also what's the word on this behavior ruining a brand new transmission? I limped the truck to the gas station and back and didn't beat on it at all. Tried to get into neutral where I could to let it coast etc. It was about a 4 mile trip round trip.

Thanks!

Does seem like a VSS problem, get a scan tool on it and pull the codes and or see what's going on inside electronically.

 

[no cigar]

So I located the culprit. Seems somewhere along the lines of removing the old case or whatever - the jackets on both the wires on the drivers side VSS were frayed. Did some heat shrink and re seated the pins in the plug and all was good after that.