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Old 02-11-2014, 03:18 PM   #1
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Getting 4.10s Question about tuning

I have a 91 race tune from bama so if I swap out 3.27s for 4.10s can I just go on my tuner and switch the ratio on the tuner to 4.10s and I'm good to go? Any need to write a new tune?
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Old 02-11-2014, 03:26 PM   #2
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I have a 91 race tune from bama so if I swap out 3.27s for 4.10s can I just go on my tuner and switch the ratio on the tuner to 4.10s and I'm good to go? Any need to write a new tune?


I only know the stock tire size with 4.10. Some tires are within 2 to make the equivalent to stock tire size. Example: My Cobra 18" rims are equivalent to stock size.Go in the tuner if you have stock tire size and put @810 revs/miles. We did a post in the v-8 section about this I will look for it later. It has very helpful 411.
Have you updated your tuner? You can adjust axel ratio if your tuner is updated.
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Old 02-11-2014, 03:44 PM   #3
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I only know the stock tire size with 4.10. Some tires are within 2 to make the equivalent to stock tire size. Go in the tuner if you have stock tire size and put @810 revs/miles. We did a post in the v-8 section about this I will look for it later. It has very helpful 411.
Have you updated your tuner?
I last updated it a few months ago, and I'm on 245/45/17s. I see on my tuner I have the option to change the axle ratio and revs/mile
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Old 02-11-2014, 04:11 PM   #4
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I last updated it a few months ago, and I'm on 245/45/17s. I see on my tuner I have the option to change the axle ratio and revs/mile


Gear install (finally)
Read this post it is helpful.
That is the stock diameter on 99-04. Remember you have a 8.8 so the rim size changes to v-8. 810 rev/miles is the answer.
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Old 02-11-2014, 04:25 PM   #5
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Is it still @810 if It's the 7.5 t lok I'm going with? Thanks
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Old 02-11-2014, 04:29 PM   #6
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I would call Am and tell them you got the tuner from them and ask for the answer. 4.10s in a 7.5 rear end require a specific gear designed for the 7.5. Make sure you have the right gear. It is hard to find.
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Old 02-11-2014, 08:51 PM   #7
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Depending on the tuner you have then yes you can go in and manually change it
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Old 02-12-2014, 09:01 AM   #8
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Originally Posted by TorchRed03 View Post
I have a 91 race tune from bama so if I swap out 3.27s for 4.10s can I just go on my tuner and switch the ratio on the tuner to 4.10s and I'm good to go? Any need to write a new tune?
Hey TorchRed,

Yes. You can go into your tuner and change the gear ratio yourself if you'd like. However, that's one of the great benefits of our Free tunes for life program. You can just give the Bama team a call and they'll gladly make this adjustment for you and send out a new tune right away! This should only take a few minutes and your speedometer will be in good shape. We won't change anything else in the tune, just the gear ratio.

I hope this helps. Let me know if you have any further questions or need some assistance. Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST. You can hit them up directly at 888.226.9764 and they'll get you squared away!

-Dan
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