Slow/Jumping Speedometer

[mhalter]

A few weeks ago my speedometer started jumping. Nothing serious, just about +-2 mph. So I pulled the cable out and greased it up real good. Made it worse to the point that it shows 25mph when I'm traveling 60-65 mph. So I'm thinking maybe I put too much grease on it or the grease is too thick. So I pulled it out and dowsed it with WD-40. That helped a little bit but not much. So I pulled it out again and tried white lithium grease. Still no good. Its bouncing about +-5mph and reading around 20-25mph too slow and I'm getting tired of pulling the dash apart. I've also took the speedogear out of the tail of the transfer case and inspected it. It looks to be fine. Whats the problem?

[OkieGringo]

Well, if it's not the cable, it has to be either the driven gear(easy to replace, the drive gear(hard to replace) or the speedo head(hard and expensive to replace) [img]/ubbthreads/images/graemlins/shrug.gif[/img]. "Copy" and "Paste" the address below into your address bar. They have lotsa info and parts. OkieGringo


http://www.tciauto.com/tech_info/speedo_gears.htm#700R4

[twelve0six]

Get yourself an inspection mirror and a bright flaslight and crawl under the beast. remove the cable and gear from the transfer case and have yourself a peak down the hole that the gear came out of...You should see a yellow gear on a shaft. The yellow gear should be totally visible, and not offset in the hole. Stick your finger in the hole and feel the yellow gear. Note things like how the teeth feel...are they arounded off etc? If that all looks good take the gear off of your cable inspect it...look down inside of it where the cable sticks into the gear...is the square hole rounded out, making it not grab all the time? If that all looks good, put a drill on the cable and run it in reverse...make sure you can see your speedo or have someone with you who can look at if...if the speedo still registers wrong your are down to 2 things, crappy cable, or bad speedo head. Good luck.

Shawn