I have a 99F-150 with the 5.4 and I have changed the gears from the stock 3:55's to 4:10. Needless to say my speedo is off 15mph with erratic shift points. The code on my door is DAH4 and Superchip does not currently have a fix for the problem. Does anyone out there know of any company that can fix this problem before I get extremely frustrated and put the stock gears back in!!

 

Hi Ron,

Actually, fixing the shift points is easily done, that isn't a problem and can be done. They have been doing the R&D on a number of different codes for the F-150's for the speedo corrections, and they have some of them done, such as the Lighntings of course, then the ZZT code series, the BOJ series, BIK series, etc. I have a message into an engineer who will be looking at your DAH4 code file to see if it's ready to go on the speedo corrections, and I'll let you know as soon as I've heard back on that, as we discussed on the phone the other day.

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Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Performance Products F150Online Superchip ordering system: F150Online Superchip Ordering System
First National F-150 Online Rally Event Organizer

 

Mike, Thanks for your help!!

Ron