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Old 06-18-2012, 09:23 AM   #16 (permalink)
EcoModding Apprentice
Join Date: Mar 2012
Location: Adelaide, Australia
Posts: 234

F Truck - '77 Ford F100 2x4, single cab, lwb
90 day: 8.75 mpg (US)

Bombodore - '98 Holden Commodore Exec Wagon
90 day: 21.35 mpg (US)

Civic - '93 Honda Civic GL
90 day: 36.62 mpg (US)

Jim The Prius - '09 Toyota Prius
90 day: 36.66 mpg (US)
Thanks: 147
Thanked 59 Times in 34 Posts
thanks guys,

according to my calculations i need around 2.9:1 to get the rpm down to around 2000 in 4th at 60mph, so either 2.73 or 3.08 are pretty close depending on availability (there is an F truck wrecker near me)

A 5 speed is also a possibility as a friend of mine has a similar year F100 ex ambulance with a 5 speed, not sure what gearbox it is but apparently is ex canadian if that means anything.

the price of the diff VS the new gearbox will determine which i do first, i need to go have a look at my friends car to see what gearbox it is too and hopefully find out the ratios

other than that i havnt done much in the last couple of days, the gas system is playing up a bit causing the car to not start until ive turned it over for a minute or more which is annoying, it only does it after sitting for a while though, after the first start it starts straight away every time which makes it difficult to diagnose. Im going to see a mechanic sometime soon so hopefully he will know whats goin on

thanks for lookin

(Posted in 2020) 2009 Prius Off Road project:

(Posted in 2012) 1977 F100 Project:
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