I figured I would throw this out to all you gurus before I started throwing parts at it. I just finished up my NV 4500 swap in my 93 and I'm down to wiring of the VSS. the transmission is from a 2002 Duramax but it was in a 95 Chevrolet with a 96 ppumped Cummins motor. it has the upgraded larger billet input shaft and fully splined main And the clutch is a south bend dual disc 3600. I read that after a certain year they moved the VSS to the rear axle but this transmission has a plugin in the tail housing. I'm wondering if I get the pigtail from Napa and plug it in and wired up if my speedometer will work or if I will have to get some kind of adapter from Dakota digital. any help would be greatly appreciated and thank you in advance. Here's a pic of the plug in the tail housing.

 

This is on your 2wd D350? Could you post up a couple more pics, a bit farther back, and at a angle as well.

 

Yes it is. I only have one other picture at the moment but it will only let add a link since i already attached the picture to another thread you had. https://www.dieseltruckresource.com/...412_094337.jpg

 

Never looked at a check nv4500 tails haft, so I assume that is what I am seeing. I would be interested to see what the assembly looks like removed. If it runs off a gear, or ???

 

Yes it is a chevy tail shaft. I have no clue as to the inner workings of the tail. Hoping someone here would know.

 

Looks like it's fully electronic. Kind of like a crank position sensor and picks up a notch in a gear if i had to guess. Here's a picture of the sensor that plus in the tail shaft. . is there any way to convert the signal this sensor is sending to something my speedometer and odometer can read

 

If they updated it with an updated Cummins NV4500 main shaft then it might not have the proper set-up on the shaft to even generate a signal? I would want to pull it out and see what's going on inside first.

 

Well i just had the transmission gone through before i installed it, and it's in the truck already so I'm really not a fan of pulling it out again. i know i should have had the shop look at it first but it's too late now

 

All you need to do is pop out the current VSS sensor and take a look inside...and a couple pics, of what is inside. Don't need to pull the tranny to do that.

 

 

Not sure where, or how the GM VSS gets it's signal. I have been looking at pics of GM and Dodge mainshafts, I can't see how the VSS works on the GM units.

 

It looks as though there is a magnet on the sensor i took out and a tooth missing from the gear it reads off of inside the tail housing. I hooked it up just for kicks and barley moved the truck and it said i was going 45mph. I'm just curious if this Dakota digital thing will adjust the signal.http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=126/category_id=287/mode=prod/prd126.htm. thank you again for all your input so far thrashingcows. I appreciate it

 

http://http://www.dakotadigital.com/...rod/prd126.htm

 

Well the dang link isn't working. Sorry

 

Could you not just swap on a tailhousing from a 2wd NV4500? They did use a dodge cummins main shaft? So it should go on with no issue then.

The early 94-96-ish units still had a VSS running off the tailshaft. I had one on my 95 2wd NV4500 in my crewcab. Then you can use all factory arts to get your speedo working properly.