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optimal gearing with motor replacement

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Old 08-16-2012, 07:51 AM
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Default optimal gearing with motor replacement
Thinking about dropping a HEMI in 2010 six speed. I have 4.10s now and was wondering if they would be good with the new motor or hurt the new motor performance. It is my daily driver.
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Old 08-16-2012, 08:26 AM
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Wondering this as well. I was going to put 4.88s in my 2011 JKUR with 35s but want to do a Hemi swap. Subscribed....
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Old 08-16-2012, 08:37 AM
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Haven't done it but the way I understand it, the gearing choice has to do with the trans not the motor choice.
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Old 08-16-2012, 08:46 AM
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I did a hemi swap and went with the 4:88 gears on 37's with a 6-speed. It is working very well for me.
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Old 08-16-2012, 09:02 AM
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Originally Posted by keithsfd7
Haven't done it but the way I understand it, the gearing choice has to do with the trans not the motor choice.
I think it has to do with both, tranny and motor. You want to have your RPM in the optimal spot for a given motor. And RPM is dependant on tranny and diff gearing.
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