4.10's and chip
Thread Starter
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Member
Joined: Mar 2000
Posts: 68
Likes: 0
From: Ohio
4.10's and chip
Will I need to change my chip if I go to 4.10 gears? I have seen a few posts on this but don't know what had to be changed in the program. What rpm would the truck run at 55. It runs 1650rpm at 55 now with 3.55 gears and 255/70/16 tires.
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1997 F150 XLT
Debut sport truck
Ext. cab short bed
4.6l 3.55 tow pack *leather *K&N filter *Gibson swept side
*power rear slider
*soft tonneau
*full running boards
*timbren rubber springs *tekonsha brake control.
*bugflector II
*superchip
*rancho RS9000
http://community.webtv.net/rexor29/F150
[This message has been edited by ALLFORD (edited 09-02-2000).]
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1997 F150 XLT
Debut sport truck
Ext. cab short bed
4.6l 3.55 tow pack *leather *K&N filter *Gibson swept side
*power rear slider
*soft tonneau
*full running boards
*timbren rubber springs *tekonsha brake control.
*bugflector II
*superchip
*rancho RS9000
http://community.webtv.net/rexor29/F150
[This message has been edited by ALLFORD (edited 09-02-2000).]
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
Hi ALLFORD,
You'll be turning roughly 1900 rpm at that same speed with the 4.10's, just giving it a quick "guesstimation".
Since you have a 1997, all you need to do is to recalibrate your speedometer using the correct reduction gear in the transmission. Up thru and including the 1998 model year in the F-150, you can still recalibrate the speedo with a standard reduction gear, starting in 1999 it's all in the computer. Once you do that, you won't need any changes in the program in most cases. Recalibrating the speedo generally solves any upshift/downshift point variations due to the gear change, as the VSS sensro data is once again correct.
One thing to watch for when you install the 4.10's is to see if you bounce off the rev limiter on the 1-2 full-throttle upshift (this doesn't hurt anything, but it sure slows down acceleration of course, and is easy to fix), after having your speedo recalibrated. If this happens, then yes, we'll need to do a custom program to compensate. If it doesn't, then we do not need to do anything at all in the program, so that is what to look for.
Good luck!
------------------
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
You'll be turning roughly 1900 rpm at that same speed with the 4.10's, just giving it a quick "guesstimation".
Since you have a 1997, all you need to do is to recalibrate your speedometer using the correct reduction gear in the transmission. Up thru and including the 1998 model year in the F-150, you can still recalibrate the speedo with a standard reduction gear, starting in 1999 it's all in the computer. Once you do that, you won't need any changes in the program in most cases. Recalibrating the speedo generally solves any upshift/downshift point variations due to the gear change, as the VSS sensro data is once again correct.
One thing to watch for when you install the 4.10's is to see if you bounce off the rev limiter on the 1-2 full-throttle upshift (this doesn't hurt anything, but it sure slows down acceleration of course, and is easy to fix), after having your speedo recalibrated. If this happens, then yes, we'll need to do a custom program to compensate. If it doesn't, then we do not need to do anything at all in the program, so that is what to look for.
Good luck!
------------------
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