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**kwmech** · 06-03-2023, 10:34 AM

Leave the 3.73 and step up to a 5 speed. A swap to 3.42s is only a 9 percent difference in RPM. A 5 speed will net you about 25 percent depending on which overdrive trans you go with

06-03-2023, 10:34 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,403	Re: Difference in Hiway RPM-3.73 to 3.42 Leave the 3.73 and step up to a 5 speed. A swap to 3.42s is only a 9 percent difference in RPM. A 5 speed will net you about 25 percent depending on which overdrive trans you go with