355 to 308 ratio?
04-15-2022, (Subject: 355 to 308 ratio? ) 
Post: #1
355 to 308 ratio?
I have a 2009 prostar ISX 485, 13 over 355 rears on 22.5 low tires.
If I drive 55 mph the truck gets decent fuel millage 7.5 - 8 if I drive 62-65 millage goes in the toilet to 5 mpg.
If I change both rearends to 308's what can I expect for road speed and millage?
replyreply


Messages In This Thread
355 to 308 ratio? - earnies2 - 04-15-2022
RE: 355 to 308 ratio? - tree98 - 04-15-2022,
RE: 355 to 308 ratio? - Rawze - 04-16-2022,
RE: 355 to 308 ratio? - Rawze - 04-16-2022,
RE: 355 to 308 ratio? - tree98 - 04-16-2022,
RE: 355 to 308 ratio? - Rawze - 04-16-2022,
RE: 355 to 308 ratio? - JimT - 04-16-2022,
RE: 355 to 308 ratio? - Rawze - 04-16-2022,
RE: 355 to 308 ratio? - JMBT - 04-26-2022,



NOTE: Rawze.com is not affiliated, nor endorses any of the google ads that are displayed on this website.