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**mongocanfly** · 12-03-2020, 10:56 PM

Adding a od will have a effect that could be good or bad..
What are your rear gears and rear tire size?
These calc will help determine highway rpms..
https://tiresize.com/chart/
http://www.csgnetwork.com/multirpmcalc.html

12-03-2020, 10:56 PM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,587	Re: Looking for old posts on installing the np 4500. Adding a od will have a effect that could be good or bad.. What are your rear gears and rear tire size? These calc will help determine highway rpms.. https://tiresize.com/chart/ 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