New tires and changing shift points - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 03-25-2013, 10:25 PM Thread Starter
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New tires and changing shift points

Whats up PowerStrokers!!! I have a quick question.

I just lifted my 2002 F250 7.3 PSD and want to run 315/75/16. I know that my gears in the differentials are 3.73. Should I consider getting my shift points changed to compensate for the bigger tires? If I should can I do it myself with a programmer or take it to a dealership/shop to get that done? Anyone with info on this subject it would be great to hear.
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post #2 of 7 Old 03-26-2013, 04:58 AM
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I have an 02 F-250 CCLB 4x4 with a lift and 315/75r16 tires. I have the 3.73 gears and never had them changed. Truck still has plenty of power and I never felt that it would be worth the money to have them changed. I just installed the PHP Phoenix 6 position chip and am more than happy with it. This weekend I drove it to the Blue Ridge Mountains and it did awesome. It even climbed Afton Mountain {the steepest around this area) without ever kicking out of overdrive.

2002 F-250 CCLB 4x4 7.3L 4" susp. lift with 315/70r16 Cooper AT3 tires, 4" MBRP straight exhaust, K&N cold air intake with Napa 6637 filter, AutoMeter trans temp, EGT and boost gauges mounted in an AutoMeter triple gauge A-Pillar pod, PHP Phoenix 6 pos chip, amber LED marker lights under cab on drip rail, alpine cd/dvd/navi/bluetooth/backupcamera/ipod/xm sirius , 1300 watt amp with 2 10" subwoofers behind seat, remote start, Cobra NW LTD 29 cb with Wilson 2000 Trucker antenna.
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post #3 of 7 Old 03-26-2013, 05:20 AM
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Re: New tires and changing shift points

Granted I'm not in a OBS but I have 345/75/16s on my truck with stock 3.73 gears and it shifts just fine. It did a lot better after I had my speedometer recalibrated but even before that it was fine.

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2003 F-250 6.0L - Lariat King Ranch
-300k+ miles and still strong
Current Mods
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-Edge CTS
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post #4 of 7 Old 03-26-2013, 05:34 AM Thread Starter
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Thanks guys I appreciate your inputs. So I should not be to concerned about my truck shifting differently?
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post #5 of 7 Old 03-27-2013, 03:31 AM
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Quote:
Originally Posted by bartnick66 View Post
Thanks guys I appreciate your inputs. So I should not be to concerned about my truck shifting differently?
Nope, you should be good to go, worse case scenario you have to get your speedo recalibrated. Does your truck have abs?

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-Brian

2003 F-250 6.0L - Lariat King Ranch
-300k+ miles and still strong
Current Mods
-6.5" Pro-Comp lift
-Edge CTS
-SCT X3 (Tuned by Vivian )
-4" Turbo Back Silverline Exhaust, 5"tip
-Blue Spring Mod
-Sinister Coolant Filter
-Oil Cooler
-Sinister EGR Delete
-OEM Cab Lights
Wants/Soon
-ARP Studs
-MTW Stage 1 or Hybrid
-6.4 Banjo Bolts?
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post #6 of 7 Old 03-27-2013, 09:43 PM Thread Starter
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yes my truck ha ABS. will hat make a difference?
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post #7 of 7 Old 03-29-2013, 06:33 AM
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Quote:
Originally Posted by bartnick66 View Post
yes my truck ha ABS. will hat make a difference?
How far off is your speedometer?

Sent from AutoGuide.com Free App


-Brian

2003 F-250 6.0L - Lariat King Ranch
-300k+ miles and still strong
Current Mods
-6.5" Pro-Comp lift
-Edge CTS
-SCT X3 (Tuned by Vivian )
-4" Turbo Back Silverline Exhaust, 5"tip
-Blue Spring Mod
-Sinister Coolant Filter
-Oil Cooler
-Sinister EGR Delete
-OEM Cab Lights
Wants/Soon
-ARP Studs
-MTW Stage 1 or Hybrid
-6.4 Banjo Bolts?
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gearing , new tires , shift points , tire size , transmission

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