so i put bigger tires on my ranger, i have like 29 inch tires from like 24 - 25 inch tires and well obviously my speedo is really off, so i want to know if any of you know how to calibrate a speedometer, i did find one how to but it wouldn't let me open it. so any help will be greatly appreciated, thanks?

 

well i talked to a mechanic today, and he told me that the speedo reads like a ring gear in the tranny, any of you know which gear that is, or if its different for my year, and what kinda gear do i need, and what vehicle i can get it from? thanks!

 

Just do the math. Its wasted money when you could just figure out what your real speed vs your displayed speed is. lol

 

eh, but its really ****ed up, its not always five slow, my friend behind me was going 65 when it said 55 so its just a pain in the ***. i just want to know if there is another vehicle i can get the ring gear out of which will be fairly cost effective to go to a junk yard and get it

 

no... it's maybe a 2mph difference. there are calculators online to figure it out
and yes the sensor is a speed sensor in your differential. don't take it out, I had a broken one in mine for a while and it really screwed up my tranny.

 

My friends speed sensor was messed up in his 99 2wd auto trans. As soon as you went over 60, the speedo would flip out, and the truck would downshift into second after a few seconds. So yea, dont screw with that
You may be able to take off the needle and adjust it a bit, but that wont get you exact really.

 

tuner/programmer

 

well its def way more that 2 mph, believe me i'm the one driving it, it wouldn't even go past 65 and i could tell i was flying when i was coming down the hill, and there's a spot a little after 50 were when i slow down it hesitates before going down, now mines a manual transmission a lot simpler than an auto, if the ring gear is up front then it should be fine to replace it, however if i have to take half the transmission apart then i'm obviously not going to bother, it would be nice to have an accurate speedo so when i see a cop on the highway it would be nice to know how fast i need to slow down to in a hurry,

 

is there a programmer for an 89? that's still probably more expensive than knowing what vehicle i can take the ring gear from and getting from a junk yard and having the experience of taking it out.

 

Got a GPS?

 

nope, too poor, i use map quest? that's the issue i would borrow one form somebody but if it gets stolen it a big chunk of change outta my pocket, come on guys i like getting my hands dirty anybody know what gear i need?

 

A GPS would actually be the cheapest way to go ... I bet you could find one on e-Bay or Craigslist for 50 bucks.

 

All of this talk about ring gears, programmers and rear axle sensors is BS.

The 89 speedometer is cable driven off the transmission (2WD) or the transfer case (4WD). There is a small gear that can be exchanged to another tooth count to correct the speedometer for axle ratio and/or tire diameter changes. The gear is located on the VSS sensor that drives the speedo cable so the VSS must be removed to access the gear. Swapping to the gear with the correct tooth count will fix the speedometer error IF your combination is still within the range allowed by the available gears.

Go to the Tech Library at www.therangerstation.com and read the section on 94-back speedometer correction for more info.

 

^That's how speed is read on both my 77's.

 

and it took 13 replies for someone to be correct...my face was turning red as i read down the list of the tuners and OSS tone rings in the transmission...remember guys, there was a time when you could do things to vehicles without pressing buttons

 

A speedometer shop can make you a ratio adaptor. Any ratio you need. It just mounts to the transmission and the cable mounts to that. Then if you go back to orginal tire size just pull it off. Some other size? just change gears in the adaptor. It's a little box about 1 X 2 x 3/4.

 

Finally somebody gets the right answer. and that "IF" in his statement is actually a no. trust me, i've got 32's and they used to be 29's (i think). there isn't a better gear you can install. just calculate the difference.

You were getting red? i was going nuts! he has an 1989 ranger. some members on this forum weren't even born then! in 1989 there was no OBII all your diagnostic tools nowdays would be worthless on that truck.

 

yeah i actually found out about that little pinion looking gear today, while researching, now i just need to find the tooth count needed and i will be on my way, and i for the last time i would just calculate the difference, but its really ****ed up. anyways, thanks bob, too bad, i found that out before i had a chance to read your post.

 

touche. all I know is my 98 has a rear axle sensor.
I should learn to think a bit next time before another embarrassment

 

hey its alright, we all make mistakes, its just part of the learning process,

 

I have my doubts on your finding the right tooth count. i've looked before for my truck and there isn't very many out there.

 

You should just FEEL the speed you are going. It's way more accurate than this technology crap and gears and teeth and whatnot.

 

lolwut? I just go as fast as the guy in the fast lane, if i FEEL like i'm speeding. i go by a cop and find out.

 

Seriously? The gear driven speedometers are pretty accurate

 

Lol, nice.

No dude, not really. I was kidding, lol.