Chips and diffrent size tires???
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Senior Member
Joined: Jun 2001
Posts: 119
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From: Houston, Texas, USA
Chips and diffrent size tires???
Ok guys, I've got a 99' F150 with the Diablo chip. Two weekends ago I got some new tires. Instead of going back to the stock 235/70/16's I went to275/70/16. Now for the problem, its like the shift points are all shot to hell. Do I need to get the chip reburned to the new tire size or am I just S.O.L.? Any info would help. Oh yeah its just a regular 2wd not 4X4.
Former Sponsor
Joined: Mar 1998
Posts: 13,385
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From: Virginia
Hi dsm327,
Yes, you will need to have that chip updated with a custom program to correct the speedometer & odometer error. Doing that will automatically restore your shift points back to normal.
Yes, you will need to have that chip updated with a custom program to correct the speedometer & odometer error. Doing that will automatically restore your shift points back to normal.