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Does speedo recalibration affect shift points?

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Old 07-13-2005, 07:17 PM
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Does speedo recalibration affect shift points?

I can't remember if it does or not. I may go back to 265s and I'm wondering if my trans would shift strangely if I didn't get the speedo recal done right away..
Old 07-13-2005, 08:58 PM
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it shouldn't, shift should be caused by engine rpm i'm pretty sure
Old 07-13-2005, 11:48 PM
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on mine it does. when i ran the stock 265's OD would lock at 45, now with the 315's it doesnt lock till 50....just my .02$ hopefully someone else will chime in.
Old 07-13-2005, 11:51 PM
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yeah it will change shift points when i put my 37's on it shifted weird then had it reflashed made a world of diffence in the shifting and power.
Old 07-14-2005, 12:20 AM
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ryans05 where did you get the need revolution per mile number for the 37's i have the 315's and cant find it.
Old 07-14-2005, 12:40 AM
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the dealer near me did it for me .
Old 07-14-2005, 01:56 AM
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most tire manufacturer will have that info on thier website.
Old 07-14-2005, 03:36 AM
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Thanks guys. Tirerack.com gives the revs with the specs on their tires.
Old 07-14-2005, 09:42 AM
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Originally posted by powerstrokin03
315's and cant find it.......
The 315s are 601 revs per mile. Set to 601, my speedo is dead accurate against a GPS at all speeds.
Old 07-14-2005, 04:14 PM
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Ok thanks guys headin over to the dealer this afternoon
Old 07-14-2005, 06:27 PM
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I called a local dealer and they told me that they can only program in "stock tire sizes", and not an arbitrary rotations-per-mile. Is this the case? If so, what "stock combo" works for 4.10s and 315s?
Old 07-14-2005, 07:26 PM
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Try another dealer. They either dont know how, dont want to mess with it or dont want to do something that might upset Star.

It is a 5 minute job with the DRBIII tool connected. It is an option in the ABS section for "Pinion Factor".

My dealer did it for free in about 5 minutes.
Old 07-15-2005, 06:02 AM
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Originally posted by RamWheelsBy4
My dealer did it for free in about 5 minutes.
HA! This dealer wanted $89.95 just to "try". They can kiss my ***....
Old 07-15-2005, 07:56 AM
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Is it possible to purchase one of those DRBIII tools?

I have seen some that just tell you what the codes are ($90 or so) but some also allow resets of codes and maybe more? I'm not talking about spending $600 or so for the dealer types but more like $150 - $225 or so for a good one that will do possibly more then seeing the codes.

Would that allow the DIY guy to do some stuff by himself?
Old 07-15-2005, 08:44 AM
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I'm pretty sure I know the Dealer you are speaking of....I was told the exact same thing.


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