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Old 05-19-2013, 12:43 PM   #1
jcbrindle's Avatar
Join Date: Sep 2011
Posts: 45
New engine, new axle, need gearing opinions

I'm finishing up my 5.3, 4L60E, NP241 swap this week. While I was doing the power train swap I also installed a 2" BDS lift kit and a 8.8 rear axle. When I bought the 8.8 the guy told me it has 3.27 gears in it, haven't opened it up yet to confirm. So any of you guys that have done this engine mod, what gears/tire size are you running. I have already done the calculations and know my RPM at 75 MPH with 4.10 gears would be 2192. I'm pretty sure I'm going to go with installing 4.10's to match the front but just wanted some opinions. I'm running 33" tires.
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jcbrindle is offline   Quote
Old 05-19-2013, 08:49 PM   #2
Join Date: Apr 2010
Location: Phx, AZ
Posts: 303
Nice Jeep, great engine swap! I did it about a year ago and love it!!! You will too!

I ran 4.10 with 33's and it was perfect. Great power and good gas mileage. About 20mpg if you can keep your foot out of it!

I recently upgraded to Dana 44'a and out in 4.56 because I will be running 35's.
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