Hello,

I’ve got a related to a recent transfer case swap I done on my pickup. I have 97 4.6L 4WD with the manual transmission and manual shift t-case. The transfer case blew up so I got a nice used unit off of a later model parts truck, I think 2000 model. Got it installed and took the truck for a test drive and noticed that the speedometer was way way off, reading high, and when the speedometer would cross the 100mph mark or so the truck would just fall flat on its face, like the fuel had been cut. I’m assuming this is due to the speed being limited. However because the Speedo is so far off this limits me to 2nd gear. I pulled the speed sensor out of the tail housing of the new t-case and found it to be different than the spur gear setup on the old unit. This one looks like a crank sensor that senses pulses. Is this my problem? And if so do I just need to swap tail housings and put the speedo gear into the new unit?

Thanks in advance.

 

I have to ask what you took out being a 97, and what you put in. 97 has either a 1356 Warner or a 4406 Warner by book. The 2000 is a 4406. Did you swap compatible t/cases?. They bolt in the same, but arent' the same. There is a noticeable difference side by side.

 

Thanks for the reply, the case I pulled out was a 4406.

 

I just went into the interchange book for the 97 4406 t/case. It fits 97 and 98 only. Just like the transmissions are only 97 and can be re-plnned to work on 98 models. 99 up uses the digital signal, as the 97-98 use analog.

From all I can find and remember, the 99 up won't work correctly. Which number did you use? XL34-AA, AB or AC out of that 2000? AA is basically 99-00, AB and AC are 2000 up.

Like I said earlier. 97-98 are their own animals for most things. Especially drivetrain-related items, but the rear axle assy can be swapped to the newer, but then you run into 14mm studs vs 12mm on your 97.

 

Interesting... I've never seen a 1356 in a 10th gen.... with a modular anyway.

 

I'm wondering if that 1356 is 96 OBS leftovers sold as 97's. Like the GEN 10s sold as 97s but in some states are 95's or 96's. even tho they are 97 model years. Texas is bad at that. There is another state in that area we had problems with on trades-ins with the DMV.

 

I was wondering it it was a 4.2 option. I used to scour the yards for 4406's in the manual variety. The shifters sell quick on ebay, and have a good margin too.

 

So mechanically speaking, do you have any idea with what is different between the 97-98 4406 and the later years? I mean the 2000 transfer case is in, and operable, it’s just throwing the Speedo out of whack. Im thinking I could just swap the tail housings and use the old spur gear VSS. The only thing would be I would need the shaft in the case to have the ball detent to hold the gear to the shaft.

Also, I’m still a little confused on the sensors themselves. I suppose I would need the data sheets which I doubt are readily available but the spur gear vss has the same header connection as the Hall effect vss. The harness plugged right in. I suppose the output of the halleffect is probably a PWM signal where as the gear sensor is a continuous voltage level based on rotations of the gear?