recalibrate speedo?

bryan28 · Apr 16, 2017

Once the lift and 35s are on my truck will I have to recalibrate the speedometer? It's a 2017 1500.

crazykid1994 · Apr 16, 2017

If it's not running 35s already your speedo will be wrong. So I would say yes you will want to

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AFMoulton · Apr 16, 2017

What's the best way to do this??

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bryan28 · Apr 16, 2017

AFMoulton I plan to ask the dealer if they will do it after they install the lift and put on the larger wheels/tires. If they're unable too I may buy a speedo recalibrator or take it to a shop that has the tool to do it. An offroad shop that changes gears, wheels and tires should be able to do it for me.

808ram1500 · Apr 17, 2017

buy a tuner maybe? Diablo Infinity?

Moab_Rockstar · Apr 18, 2017

The dealer should be able to change the tire size in the BCM. That's all you need, it should be good to go after that.

TerraNewf · Apr 18, 2017

Glad this question was asked, I was wondering the same

Hemi_1340R · Apr 18, 2017

Can the dealer change it for 35s I thought they could only do it for stock size tires ?

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bryan28 · Apr 18, 2017

When i dropped the truck with the dealer for the lift install and to have the new wheels/tires put on he said he should be able to do it for me. We'll see. If not I'll go to an offroad shop that specializes in lifts and bigger tires and have them do it.

yillbs · Apr 18, 2017

Dealer can't do 35's, no matter how much you beg them. You need to get a speedometer calibrator form hypertech. Part number : 752501, Any offroad store can order it for you, it's about 200 bucks, but does some other semi useful things. That's what I did, and now I change it myself, can read codes too.

Hemi_1340R · Apr 18, 2017

Can the diablo tuner change it ?

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yillbs · Apr 18, 2017

Hemi_1340R said:
Can the diablo tuner change it ?

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As far as I know, no , at least on the 2016 / 2017 year models.

AFMoulton · Apr 19, 2017

So at my dealer now, and they do not recalibrate speedos

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Moab_Rockstar · Apr 19, 2017

If the dealer has a tech with development tool access, there is a tire circumference value that can be inputted manually. WiTech only allows specific tire sizes now, no longer allows a custom value. Lame

AFMoulton · Apr 19, 2017

Moab_Rockstar said:
If the dealer has a tech with development tool access, there is a tire circumference value that can be inputted manually. WiTech only allows specific tire sizes now, no longer allows a custom value. Lame

Well that's ********! Wonder if I can find someone who can do it on the DL.....

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zstampe · Apr 19, 2017

Why not just leave it... you're talking about a few percent inaccuracy is all.

PDXRam · Apr 19, 2017

DiabloSport inTune can fix it (also on (2016/2017). But, it is as mentioned above a tiny fix that can cost a few hundred bucks (tuner) or around $100 at the dealer. I did it at the dealer

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recalibrate speedo?

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