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Old 07-14-2013, 11:54 AM   #1
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Speedometer reading

I recently change my rear because I bent an axle in my old one. My old rear had 2.73 gears and my new rear has 3.27 gears, will this throw off my speedometer reading?
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Old 07-14-2013, 12:09 PM   #2
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Yessir, you're going to have to get it re calibrated if you don't want speeding tickets. I think a tune can fix it
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Old 07-14-2013, 01:24 PM   #3
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It's the perfect time to buy a handheld tuner. Yes it'll fix the problem
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Old 07-14-2013, 03:24 PM   #4
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What tuner would fix the problem that's fairly cheap? I'm on a bit of a budget
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Old 07-14-2013, 04:27 PM   #5
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look around at ur local shops explain ur problem n they may be able to do a quick tune for that problem
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Old 07-14-2013, 05:17 PM   #6
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I have 3.27's in my 8.8 rearend(just did it yesterday), I was following my friend and he was doing 60-65 on the hwy, my speedometer said we were doing 80.
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Old 07-15-2013, 10:21 AM   #7
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on older v6's you cant tune it to fix the speedometer, you have two choices. You can install a different speedo gear (if your car is gear driven 99+ are no longer gear driven). The second and better choice regardless is to get a speedcal unit to correct it, easy to install (plugs in between the trans and computer to modify the signal to correct for your gears vs stock gearing.

The issue is just to make sure its compatible with your year/trans
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Old 07-15-2013, 10:33 AM   #8
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Quote:
Originally Posted by SpectorV View Post
on older v6's you cant tune it to fix the speedometer, you have two choices. You can install a different speedo gear (if your car is gear driven 99+ are no longer gear driven). The second and better choice regardless is to get a speedcal unit to correct it, easy to install (plugs in between the trans and computer to modify the signal to correct for your gears vs stock gearing.

The issue is just to make sure its compatible with your year/trans
Which one of these options is cheaper?
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