I just got this for my truck. I was looking at the Superlift Tru-Speed, but didnt wanna have to hardwire another thing on my truck. I know I could of taken to the dealer to have them do it, but I dont trust them to wipe thier hands, so I have no faith in them. Plus I have read alot about the Tru-Speed being a pain to get it accurate, like having to readjust it with a GPS after setting it initally. I read about the Tirepaq and liked it better just a simple hook up to the OBD port and follow the instructions, no wires to permantely hook up. I used it tonight had it done in about 10 mins, went for a ride and it was dead on with my GPS. I got it cheaper than the Tru-Speed and you can chanage it very easily if you need to. I would highly reccommend this product to anyone who would like thier speedometer to read correctly after installing larger tires. Just trying to help out my fellow lifted Cummins onwers

 

Where did you get it? ...and the more important question is will this fix the speedo for 37" tires?

MDL

 

I got mine off of ebay for 185.00 and free shipping. And yes it will fix the speedo, I have 38's on my truck and its dead on the money now.