speedometer calibration

Reply Subscribe

Thread Tools

Search this Thread

Mar 11, 2011 | 09:21 AM

quesey

Thread Starter

Laughing Gas

Joined: Aug 2006

Posts: 1,249

Likes: 11

From: oklahoma

speedometer calibration

hello i dont get over here much as the ranger just don't give many problem's.but my speedometer is off and i was wondering if theres a way to calibrate it.it's a 95 ranger with a 5 speed and it has the sensor on the rearend so i don't think i can just change the gear in the trans.
thanks john

Mar 11, 2011 | 12:37 PM

ranger pat

Cargo Master

Joined: Mar 2001

Posts: 2,759

Likes: 70

From: Elk River, MN

I think the answer is you have to take it to a dealer or somewhere to have the computer reflashed. I take it the you do not have the stock rear and or tires anymore?

Mar 11, 2011 | 02:05 PM

tomw

Logistics Pro

Joined: Jan 2002

Posts: 4,907

Likes: 39

From: suburban atlanta

If the speedometer is electronic, you have a limited number of 're-programmings' that you can do before you have to buy a new head. There is a process to change the embedded ratio and tire size 'factor' [I think...] but I don't know it.
Did you search here and on the web?
tom

Mar 11, 2011 | 06:08 PM

quesey

Thread Starter

Laughing Gas

Joined: Aug 2006

Posts: 1,249

Likes: 11

From: oklahoma

still has stock size tires and gears.3.73 i beleave and i looked online and here first.i know theres a way on my 96 f350 but not sure how to on it.
thanks for the helps guys.i'll do some more searching around

Mar 12, 2011 | 06:39 AM

greenpus

Posting Guru

Joined: Feb 2001

Posts: 1,016

Likes: 1

Quote:

Originally Posted by quesey

how far off is it? Is it off throughout the entire speed range or just when you get about 40ish? I know some people remove the cover on the speedo and pull the needle and put it on wrong which may throw off the accuracy for the entire range of speed.
If it's off by a little, I'd put up with it or take it to the dealer and ask them to recalibrate the computer for the speed. It's strange you still have the same tire size and it's off. Other option is to buy a TruSpeed from SuperLift. It's a module you install and it fixes the speedo from being off.

Sep 22, 2013 | 04:07 PM

dbak

New User

Joined: Sep 2013

Posts: 5

Likes: 0

i replaced my odometer gear and did not realize that it through my speedometer off and need to know how to recalibrate dbak

Sep 23, 2013 | 08:21 PM

reddog99

Laughing Gas

Joined: Aug 2003

Posts: 1,175

Likes: 9

From: So. Cal.

Quote:

Originally Posted by quesey

I think that the sensor in the rear end is just for the ABS system.

Trending Topics

This is prolly a 1 page thread at most

110.3k

6M
Odd knock/rattle at idle only after fully warmed up

26

274
49 ford f1 exhaust question?

15

257
vintage pics of days gone by

17.7k

1.7M
TCU Telematics module

25

786

Sep 24, 2013 | 10:21 AM

tomw

Logistics Pro

Joined: Jan 2002

Posts: 4,907

Likes: 39

From: suburban atlanta

dbak, read my post. If you do NOT have a speedometer cable from the tailhousing of the transmission, it uses a speed sensor, likely mounted on the differential housing. In that case, the speedo assembly itself can be electronically 'adjusted' to compensate for changes in ratios & wheel size, etc. As I noted there is a limited number of re-calibrations that are possible, and you may or may not be able to compensate for what ever changes you've made.
I am pretty sure the dealers are the only ones that can do the procedure, as they can also set the odometer reading when they have to replace a faulty unit. If it were simple, then all used cars would have low mileage, so it is kept proprietary.
tom