dbryans
02-07-2005, 10:44
I've been searching through the archives for information, but haven't yet found the same set of conditions that cause my speedometer problems.
I'm driving a '94 Chevy K2500 Suburban with the 4L-80E.
My speedometer will begin to jump up 30+ MPH, or simply peg to the pin (85+), but only on a warm engine.
As other have noted, it does not affect cruise control, or transmission shifts (not that I can tell). I can usually make it go back to normal for a few seconds if I back off on the accelerator, or apply the brakes.
I 'm new to this truck, only owned it for about a month, and the previous owner was aware of the problem and I was informed prior to purchase. It didn't really bother me, until I started towing out travel trailer this weekend and realized I couldn't regulate my speed like I needed to due to the speedometer being pegged.
Here is some more info on what the previous owner has commented on the subject:
Anyway, when I began noticing problems was when I replaced the four wheel drive actuator. Or at least shortly thereafter. It is located on the front axle, and if you are lying on the ground looking up at it, it screws into the axle housing from the passenger side, and looks like little more than a nut with some wires coming off of it. It has a bit of pink paint on it that sets it off a little. That was the way it came. Anyway, the original apparatus that failed had three plugs on it, and the replacement (more effective version) uses only one. The other two pigtails are simply zip tied to the axle housing. There is probably a much better solution for that, but I never pursued it, and here we are today. I am pretty sure that if someone who knows electronics better than us started there, that they would find a solution shortly.I'm not a mechanic, but not afraid to get dirty and like to do stuff myself, but could use a few hints on where to start.
The local dealer just want to replace the whole gage console assembly for $450! It sounds like it may just be a loose ground but really don't know where to start.
Thanks for your ideas and this great forum.
Shane...
I'm driving a '94 Chevy K2500 Suburban with the 4L-80E.
My speedometer will begin to jump up 30+ MPH, or simply peg to the pin (85+), but only on a warm engine.
As other have noted, it does not affect cruise control, or transmission shifts (not that I can tell). I can usually make it go back to normal for a few seconds if I back off on the accelerator, or apply the brakes.
I 'm new to this truck, only owned it for about a month, and the previous owner was aware of the problem and I was informed prior to purchase. It didn't really bother me, until I started towing out travel trailer this weekend and realized I couldn't regulate my speed like I needed to due to the speedometer being pegged.
Here is some more info on what the previous owner has commented on the subject:
Anyway, when I began noticing problems was when I replaced the four wheel drive actuator. Or at least shortly thereafter. It is located on the front axle, and if you are lying on the ground looking up at it, it screws into the axle housing from the passenger side, and looks like little more than a nut with some wires coming off of it. It has a bit of pink paint on it that sets it off a little. That was the way it came. Anyway, the original apparatus that failed had three plugs on it, and the replacement (more effective version) uses only one. The other two pigtails are simply zip tied to the axle housing. There is probably a much better solution for that, but I never pursued it, and here we are today. I am pretty sure that if someone who knows electronics better than us started there, that they would find a solution shortly.I'm not a mechanic, but not afraid to get dirty and like to do stuff myself, but could use a few hints on where to start.
The local dealer just want to replace the whole gage console assembly for $450! It sounds like it may just be a loose ground but really don't know where to start.
Thanks for your ideas and this great forum.
Shane...