January 25, 2004On my 85 blazer in the cold (haven`t heard or seen it in the summer) the spedometer with grind and the needle will go all over the place (10-15 mph difference then what i am doing)(goes back and forth) but when the trucks heats up it slowly goes away --it will do it less and less at less and less mph. it is a cable speedo cable.. it will completely stop when the truck is at full operating tempature and the heater going?? someone give me some light on this issue? A tech at work said pull the cable and lube it... but that doesnt seem like the problem??
Forums : General Tech Questions : speedo problem... (18 Views)
January 25, 2004With that year of Blazer and the popularity of them in the junkyards, I would go pay $5 and replace yours with a used one.
January 25, 2004mmmm i would try the speedometer itself.. i cant believe the cable would act like that.
January 25, 2004Believe it or not, the lube will help. With off-roading in wet areas or if the vehicle was driven in an area where they use a lot of salt on the roads, speedo cables tend to `corrode up`. Or maybe the inner cable is starting to `unwind` or fray... The lube will greatly help in both of these cases..... Oh, and they do make a tool that attaches to the speedo cable at the trans and you can connect a grease gun to it. This way you don`t have to pull the cable out ......
[ 01-27-2004, 02:21 PM: Message edited by: fmthefixer ]
January 26, 2004thanks i will look for that speedo tool... i am going to lube the cable first.. I do live in a high salt area but when the trans was replaced (the th700-r4 for the th350) the cable was not replaced but only transfer to the newer tranny...