Can't program for 5.38's - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 9 Old 07-14-2010, 01:47 PM Thread Starter
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Can't program for 5.38's

Not sure if it's been asked and answered before but here I go.
I put in 5.38's on my Rubicon and when I went to program it for the new gears the programmer (Pro Comp PC52000-1) only goes up to a 5.13 ratio so I used that and my tire size (actual messured is 34") so I used 33' instead to compensate. Is that what you guys who may have had this same problem done or did you do it differently. Please let me know.

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post #2 of 9 Old 07-14-2010, 01:55 PM
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Quote:
Originally Posted by AikiJuan View Post
Not sure if it's been asked and answered before but here I go.
I put in 5.38's on my Rubicon and when I went to program it for the new gears the programmer (Pro Comp PC52000-1) only goes up to a 5.13 ratio so I used that and my tire size (actual messured is 34") so I used 33' instead to compensate. Is that what you guys who may have had this same problem done or did you do it differently. Please let me know.
DiabloSport Trinity only accepts input for the tire size as the speedo is 'driven' by the tone rings at the hub, thus not dependent on gear ratio.

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post #3 of 9 Old 07-14-2010, 01:56 PM
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Suggestion! Sell Procomp and buy Superchips!

2008 Silver 4dr Rubi - 4.5" Rubicon Express Longarm, 37x13.5x17 Toyo M/T's, Dick Cepek DC-1(blk) 17x9, Prorock 44, ARB frt locker, RCV's (frt), Superior Chromoly Axle shafts (rear), Prosteer ball joints, 5.38 Yukon gears, RR Hydro-Assist, etc, etc, etc......
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post #4 of 9 Old 07-14-2010, 02:56 PM Thread Starter
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Sell ProComp and buy Superchipsis not an option right now

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post #5 of 9 Old 07-14-2010, 05:34 PM
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Know the feeling all too well!

2008 Silver 4dr Rubi - 4.5" Rubicon Express Longarm, 37x13.5x17 Toyo M/T's, Dick Cepek DC-1(blk) 17x9, Prorock 44, ARB frt locker, RCV's (frt), Superior Chromoly Axle shafts (rear), Prosteer ball joints, 5.38 Yukon gears, RR Hydro-Assist, etc, etc, etc......
Wheeling Trips:
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post #6 of 9 Old 07-14-2010, 05:40 PM
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Quote:
Originally Posted by maverick View Post
DiabloSport Trinity only accepts input for the tire size as the speedo is 'driven' by the tone rings at the hub, thus not dependent on gear ratio.
x2 - speedo driven by tone rings. I still wonder if changing the gear in the computer does anything?

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post #7 of 9 Old 07-14-2010, 09:08 PM
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At least for the manual, the gearing does nothing. Ive tried 4.10 and 5.13 programs with my 5.13's and nothing changes.

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post #8 of 9 Old 07-15-2010, 05:34 AM
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my interceptor was unable to get the tire size I have so I fooled it by giving it a higher gear ratio. You can fool the system by making the tire size larger if you can not make the gear ratio lower.
Its all about the end numbers anyway.
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post #9 of 9 Old 07-15-2010, 08:49 AM Thread Starter
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I think that it isn't making a difference since I've tried shorter as well as taller tire sizes and unless I go really short the shift points don't really change much. I've set it to 5.13 which is the lowest it'll go and it shifts fine and has grear response. I've got to say that having driven it with the 35's and 4.10, 5.13 and 5.38 within 2 weeks of each other I'm really happy that I switched out to the 5.38's what a difference in town and on the highway just a few 100 rpms more at 70 MPH. Best mod I've done yet.

Thank you all for your input.

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AikiJuan


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