Speedometer Sending Unit

[Mike G]

I have not had any takers as to why my speedometer has started to dance all over the place on my ol 92, so I will start looking into part replacement. Does anyone know where the speedometer sending unit is located and the GM part number of said offender. This is for my 92 K1500 (4x4), 5.7L TBI with the 700r trans.

Thanks gang, --Mike

[grampadirt]

I have not had any takers as to why my speedometer has started to dance all over the place on my ol 92, so I will start looking into part replacement. Does anyone know where the speedometer sending unit is located and the GM part number of said offender. This is for my 92 K1500 (4x4), 5.7L TBI with the 700r trans.

Thanks gang, --Mike

 

 

The sending unit should be near the ass-end of the tranny,probably on the driver's side.I'm not sure but I think it's a solid cable inside a tubed housing that screws into the tranny.Alot of times it just needs a little lubing.Also an older truck of mine did that too..turned out to be the CC.Unscrew the cable from the tranny(engine need not be running) and put an electric drill on the cable and have someone watch the speedometer to see what it does and go from there...if it's an electronic sending unit you might still be able to do the drill test....that's what I'd do

 

gramps

[Mike G]

Thanks Gary, actually tracked it down. I was having problems with my speedo running wildly, so I bit the bullet and took it to the dealership. They called back and said "the speedometer buffer has an internal short, the speedo head is worn and probably also needs a sender, be about $950 out the door". I said I will pay the $106 tech info fee and maybe be back later. I crawled under the truck to find teh speedo sender, which I did as it was disconnected (didn't affect the speedo though), but it is located on the south side of the transfer case.... I found a local speedo repair shop by the office, may be dropping it off there next week for a more calm approach.

--Mike

[Ranger]

The older speedo gears are a lot easier to replace...Don't remember exactly how it works on your specific model but I know all you should have to do is pull the speedo gear out and replace it with the equivalent or an adjusted one (if you got bigger tires, good time to recalibrate your speedometer). As for the sender it might just be the gear but you can price out that too and see if it comes in WAY under that 900 dollar estimate...I think it should only be like 100-150 bucks for parts max? Those are hard parts so they're probably a little more pricier than a set of pads.