might not be related to your speedo problem , but I had a bounceing needle totally unreadable , not sure if the odometer was acurate but the problem was the sensor under the ring gear in the rear axle,,,,,,,,,, put a new one in and speedo is as should be......... I had a previous rear gear axle problem which in turn wrecked the speed sensor......

 

I never looked at the odo...

 

I plan on cleaning the VSS. No bounce in the speedo/odo, needle just drops and odo blanks out.

 

Did you replace this yourself? What is involved in doing this?

I have a non-limited slip differential. If it has to be removed or rebuilt, I'd probably go with a limited-slip unit just for the heck of it. I would think it would be much of a cost difference between rebuilding the non-limited slip unit versus installing a limited-slip unit.

I wouldn't be able to this myself. I'd hafta take it to the dealer or some other shop.

 

We like to say that "the problem has been isolated to between the keyboard and the chair"...

 

Ah Correct MadPogue!

And If you had ever met Craig, you would agree on PEBKAC...

So, I translated the acronym it into AutoSpeak....

HOWEVER I don't know that I would be surprised to be driving down the road and look over to see Craig driving down the road with a keyboard on his steering wheel trying to type something into the FTE forums! (Or the ITD forums)...

 

Since no one has mentioned this when it happens wiggle the ignition switch and see if the odometer lights back up. As the truck ages going from RUN > START then releasing the key sometimes the it will not go all the way back to the RUN position. The Key has to be in the RUN position for the odometer and the sped-o to function, ie (light up).

 

Mooseman, I sent the truck to a heavy truck repair shop , the speed sensor was actually a freebe on them, the whole story is that back in Feb 08 I busted 3 teeth on the Dana 70 ring gear while plowing snow the shop next day aired my parts got me up and running in 3 days, the speed sensor problem was imediate but being a work truck I did not bring it back right away cause I work with the truck every day . It was a lot of work for them but they said that the speed sensor should have been ordered with the ring gear but they thought it was good to go, total cost was 1323.00 dollars I thought was not bad considering the ring gear and next day aire charges was around 300 dollars.......

BTW I bet your speedo problem is else where and not related to the rear axle, I only mentioned it cause these trucks are so much more complicated than they use to be and it nice to gain more understanding on how things work, the speed sensor was a new learning thing for me too....

 

I've used this explanation at the office several times. We simply call it a "keyboard" issue.

Also, there are 10 types of people in the world, those that understand binary and those that don't.

 

MIIIIIIIKKKKKKKKKKE! That's it, I'm putting down my keyboard, parking the truck and getting my shovel.

You even changed the acronym this time. How am I supposed to keep up?

 

I'll have to give this a try the next time it happens...and I'm sure there will be a next time.

Tried to rep, but you know the story. Gotta spread the love around first.

 

Thanks for the insight and a different perspective on this issue. Reps sent.

 

Once again, if the odo is accumulating, even when it's not displaying, the VSS is (most likely) good.

Did you know that Halloween equals Christmas? Yeah, OCT 31 = DEC 25 .

 

Haven't heard this one. Please explain. A new learning opportunity for me arises once again.

 

OCT (Octal, or base 8) 31 = 3*8 + 1 = 25 = Decimal (DEC) 25