speedo calabration

[AStewart]

Has anyone had their speedo calabrated after larger tires.

 

[Alan Reagan]

I believe the dealer can do it. Isn't that what the "pinion factor" is on the ODBII scanner?

 

[JCleary]

I believe the dealer can do it. Isn't that what the "pinion factor" is on the ODBII scanner?

They need to use the DRB III to change it. It takes less than 3 minutes if the tech knows what they're doing.



Don't let the dealer charge you $100+ for it. That's what they want around here. I finally found a dealer that wouldn't charge me.



After the tech changed it for me I spiffed him $20.

 

[MRosinski]

know your revs per mile cause they dont.

 

[Bob4x4]

know your revs per mile cause they dont.

How would you know that I'll bet I have done more of those than threads you have read :-laf :-laf :-laf



Bob

 

[67guzzler]

Huh?



Tire manufacturer's publish the revolutions per mile for their tires. Most tires of a given size have a similar revolutions per mile but they vary from manufacturer to manufacturer.



The dealer isn't going to know the revolutions per mile for a given tire. You have to know that going in.

 

[Bob4x4]

Huh?



Tire manufacturer's publish the revolutions per mile for their tires. Most tires of a given size have a similar revolutions per mile but they vary from manufacturer to manufacturer.



The dealer isn't going to know the revolutions per mile for a given tire. You have to know that going in.

I will try to say that again with a little more clarity There are plenty of dealer techs that know what they are doing. There are of course some that do not. Just as in any field of employment. The numbers don't have to come from the mfg. You can do the math.



I personally have been entering pinion factors for every imaginable tire size since that option was available :-laf I don't need to have anyone give me a number... ... . I own measuring tools



The TDR did not come up with this or many other operations. Think about it :-laf



There is no need to disrespect any group,even if you think it is the popular thing to do on this board. Rant over... ...



Bob

 

[67guzzler]

That's not disrespect. That's respect.



When I told him I had the number, he was thrilled. My tires are so large they're not listed in any of the preset options. He had to manually put the number in. He appreciated the fact that I had my act together.



Then I too spiffed him $20. 00 to show him I appreciated his time. That's respect.



How can you have a beef with that?

 

[Bob4x4]

I guess it would have to be the line... ... ... ... The dealer wont know



There are many that do

Maybe I am too sesitive or just tired of hearing the dealer bashing :-laf :-laf



Bob

 

[67guzzler]

I hear ya.



Maybe it should have been stated:



"He might not know the RPM's so if he's already doing you a favor, make his life easier and have the number. They vary slightly from tire to tire and it's a good idea to know this number for your model tires anyway... "



Like anything else -- There are good ones and bad ones. The bad ones make people assume the worst. It's probably a self-protection kinda thing. Assume the dealer is bad and then you won't be disappointed when you have a hassle getting work done.



I had to go to 3 dealers before I found one that would change my pinion factor without making it into an international incident. By the time I got to th 3rd dealer, I was so appreciative I think the guy wants me to come back.....



But I can understand if you're a good one getting tired of hearing the bashing. But blame the bad dealers as much or more than you blame the customer's who've had bad experiences.

 

[Tomeygun]

Anyone that wants to stop in STL, I can set them up... .



I might be a lowly car salesman, But I've been know to mingle around in the DRB3

 

[67guzzler]

Uhh, yea, right.

I might be a lowly car salesman, But I've been know to mingle around in the DRB3

Uhh, yea, right.



You're a heck of a lot more than that. Even though I didn't buy my truck from you because of the trade / distance hassle factor, I otherwise sure would have. I don't know how the others feel but I think you don't behave like a vender -- you behave like an enthusiast and a friend who has connections. It's like having a friend in the business, not to be cliche. I think your temperament, patience and enthusiasm is really appreciated by the folks here.



"Lowly Car Salesman"



Sure, Right. If that's true than I got some swampland in Florida I can sell ya.



(Ok now that I said all that -- paypal me $20. 00 for PR services to my email address. You know the one. )

 

[HeberRam]

Asteward, to anwer you question before this thread gets in the wrong direction, your dealer should do it for "free", or the salesman should help you out with the service manager. Like someone else said, it only takes about 3 mins. max... . In Utah, most of the service writers do it right at their desk and out you go. . The following site is kinda of fun to use, as you can compare different tires etc. and get the revolutions depending on size. The dealer/service tech. only needs the rev. number to program. . Otherwise he has to look up this information, which is time comsuming and may make a mistake with the wrong rev. number. Since you give him the number he more likely will do it for nothing.



http://www.1010tires.com/TireSizeCalculator.asp

 

[Tomeygun]

Uhh, yea, right.



You're a heck of a lot more than that. Even though I didn't buy my truck from you because of the trade / distance hassle factor, I otherwise sure would have. I don't know how the others feel but I think you don't behave like a vender -- you behave like an enthusiast and a friend who has connections. It's like having a friend in the business, not to be cliche. I think your temperament, patience and enthusiasm is really appreciated by the folks here.



"Lowly Car Salesman"



Sure, Right. If that's true than I got some swampland in Florida I can sell ya.



(Ok now that I said all that -- paypal me $20. 00 for PR services to my email address. You know the one. )

Gee, thanks. Getting all gushy on me?



Well I am glad to have a big loyal forum to voice my views/experiences/opinions to and always get good feedback



Its like I always tell me boss - I am NOT a car salesman that likes diesel trucks, I AM Diesel truck enthusiest that just happens to sell a few trucks here and there (just to have money to eat and BOMB) and almost makes a living doing it :-laf , almost



($$ on its way )

 

[Tomeygun]

http://www.1010tires.com/TireSizeCalculator.asp

Here is an other site:

http://www.streetrodparts.tv/wheel_calculator.htm



That one has comparison chart to know the difference between tires, etc - Pretty awesome to know exact height difference

 

[Spooled-up]

Don't think it has been stated here, but to calculate the revolutions per mile on the tire mounted on your truck, you note the point on the tire that is on the tread and in the center of the contact patch, mark the ground at this point, move the truck forward exactly one tire revolution, mark the ground at this point, and you have the distance traveled with one tire revolution in inches.



Take the # of feet in a mile (5280) and multiply it by 12 (inches in a foot) and you get 63360 inches in a mile.



Divide this number by the inches in one tire revolution and you get the revolutions per mile for your tire.

 

[SKargo]

Anyone near me, I can do it for you for free. As for the Revs Per Mile, most dealerships have internet access, just go to the tire maunfacturer's website. It's not rocket science.

 

[Silver_Ram]

Calling HeberRam

I have been trying to find a dealer that will do the speedo calibration in SLC & I keep getting the "It can't be done on your truck" or they want $100. 00.



I actually showed up to the dealer that wanted $100. 00 and was told they couldn't do it. Can you point me in the right direction.



I changed from 3. 54 gears & 265 tires to 4. 10 gears & 315 tires. I hoped I would be close but it is way off.

 

[Bob4x4]

Tire rack's website has a pretty good chart showing revs per mile for different tire sizes.



Bob