New tires and changing shift points - Ford Powerstroke Diesel Forum
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Old 03-25-2013, 10:25 PM
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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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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.
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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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Old 03-26-2013, 05:34 AM
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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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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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Old 03-27-2013, 09:43 PM
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yes my truck ha ABS. will hat make a difference?
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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?

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gearing, new tires, shift points, tire size, transmission

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