Tacoma Speedometer Error

My 08 4x4 4cyl 5spd Tacoma reads 70mph on the speedo but is only going 65mph...verified by stopwatch and a friendly radar gun holding cop. My dealer says there is nothing they can do to change this. I honestly can't believe that a 7% speedo error is within the engineering capabilities of Toyota. Anybody had any luck correcting this?

 

I believe Toyota's tolerance is +/- 3-6%. Just do a search on this forum and there are LOTS of posts about this problem.

 

I know there is always some error but mine is -7% . I have had many vehicles over the years and have never had one off that bad. I read several previous posts but never found a solution. Just wondered if anyone figured something out.

 

I think, unless you spend the money on electronic calibrators (~$200), take it to the dealership. See if they can/will do anything.

 

Only way to fix it is to take it to your dealer for recalibration. They won't do it because, as I understand it, 10% is considered within acceptable tolerances. Mine WAS off by 3mph at 60 but larger tires cured that and it's now dead on.

 

I took it in on Monday and they did some stopwatch tests and said it was within there specs. They said it was about 2 mph@60mph off but I drove it 2 weeks ago on a 1600 mile trip and had plenty of time to play with the time vs milemarker test and it's off at least 5mph@65. Anyway they said there is nothing they can do...the service manager said they have no way to reflash it, gave me a sheet copied out of a 05 Camry service manual showing there mileage variance and sent me on my way.

 

My new 2.7 Access Cab reads 4% fast according tot he GPS. I'm putting larger tires on that should get me pretty close. (From 215/70/15s to 235/70/15s).

 

My 08 4x4 also reads higher...about the same as yours. I've verified this both with GPS and those traffic speedometers on the side of the road. Oddly, my odometer appears to be right on. Gone are the days when the speedo and odo are directly related I guess.

According to my calcs, 265/75/16s should correct the issue...

 

Not necessarily true. I'm seeing the same issue on my '09 and, just yesterday, I re-set my trip meter and my GPS trip data at the same time. Over a short 26 mile trip there was something like 8/10th of a mile difference between the two. The odometer shows more miles than are actually being driven.

 

that would explain my speeding tickets....now i have a new excuse the speedo's off sir

 

Good luck-I've never seen a speedo OVER on stock tires.

 

mine reads lower than im actually going. The other day I thought I was going 54 in a 45. But I got pulled over and was going 58 in a 35

 

You could go one or two sizes up on your tires, that would compensate for the error. The Odo and speedo must be related, I am sure that there is only one gear driving the whole works.