Try this link if you can't find another way to fix the problem. I used this on my 99 when the dealer said they could not recalibrate my speedo with the DRB scanner. It works great and is spot on accurate. http://www.ricksontruck.com/speedometer.html

 

By my calculation for the 3.73's if you are running 315's, you can choose the 285 setting with 3.42 gears and get pretty darn close

 

I used my GPS and Power Pup to get my speedo corrected. I'm .5 off at 70 and that's close enough for me.

 

LOL I did the same thing.
--Hop

 

For those of you that are looking into another aftermarket option to recalibrate the speedometer besides the Power Pup, there is the ReSpeed by TS Performance.

http://www.tsperformance.com/new_products.html

Scott

 

Now that is VERY interesting. I happen to be driving through Bowling Green, KY next week on my way to my brothers house in Elizabethtown, KY to move him to south Texas. I very well might be stopping in there and inquiring about that module for the new Dodge pickups. Has anyone had any dealings with this company and their products?

 

Your dealer's lost just hand my 082500 mega done can't adjust bigger than33's but you can adjust gear ratio's to make up the difference your dealer may not know where these setting's are on there star scan they are under vechile prep

 

Keep us posted.

I emailed them about their ReSpeed unit working with the 6.7 trucks. If I hear anything I will post it here.

 

I heard back from TS Performance concerning the ReSpeed unit for the 6.7 trucks. Here is what they said;

"We are finishing up that application at this time. It should be ready after the first of the year. Please check back with us.

Thank you for your interest in TS Performance products."

 

Thanks very much for posting this. I will be in Elizabethtown, KY (about an hour north of Bowling Green) from the 28th of this month until the 4th, when I am moving my brother down to south Texas from there. I will drive down there and see these guys some time before I leave the state. Hell, i might pick up the very first unit they have available for the 6.7L! Will certainly post up anything I find out immediately after talking to them. Hell, I may even be able to weasel a beta tester assignment out of them...lol

 

Well I stopped off at TS Performance on the way home and had them install the ReSpeed module on my '08. It worked flawlessly for about 15 minutes then started going wacko. The speedometer started fluctuating wildly and it made my parking brake light and ABS light come on. When i slowed down under 40mph, the parking brake light and ABS light turned off yet the speedo still bounces around (for example, at 67mph on the GPS, the speedo will bounce from about 64-71mph). I called Clint at TS Performance and he said they were having a problem with these modules doing this before a reflash that all of the modules they had in stock were supposed to have gotten. Clint seems to think either the module they installed in my truck slipped through the cracks when they were reflashing them all or perhaps there is something else they haven't experienced yet with the new 6.7L platform. So, tomorrow morning I am going to pull the module and ship it back to Clint at TS. He is going to perform the reflash on the module and send it back to me. If it works then, good to go. If not, we are going to have to figure something else out. I will update as I learn more.