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**mongocanfly** · 07-30-2020, 11:15 PM

I def wouldnt go any higher..with 35s and od, 3.73s would be as high as I would go...
With 3.73s, 35s, and a .7 od, your only turning 1629rpm at 65...
4.11s will get you 1795rpm....if I was gonna change that's more what I'd look at....

I went with 4.56s on mine...I wanted around 2000rpm at 65 with my LS/v4500
Heres a rpm calc thatll help you determine things...just fill in blanks at bottom of page...

http://www.csgnetwork.com/multirpmcalc.html

07-30-2020, 11:15 PM	#9
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,579	Re: Help choosing rear end parts I def wouldnt go any higher..with 35s and od, 3.73s would be as high as I would go... With 3.73s, 35s, and a .7 od, your only turning 1629rpm at 65... 4.11s will get you 1795rpm....if I was gonna change that's more what I'd look at.... I went with 4.56s on mine...I wanted around 2000rpm at 65 with my LS/v4500 Heres a rpm calc thatll help you determine things...just fill in blanks at bottom of page... http://www.csgnetwork.com/multirpmcalc.html __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 07-30-2020 at 11:26 PM.