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MT75 Box with 0.76 5th Gear Ratio

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MT75 Box with 0.76 5th Gear Ratio

Postby PIO » Sat May 16, 2020 10:11 pm

Hi All... Planning on doing a few long runs in my van and would like the ‘luxury’ of a taller 5th gear on my ear drums. Already have a 4.63 FDR fitted...

Thanks Michael
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Re: MT75 Box with 0.76 5th Gear Ratio

Postby karl » Sat May 16, 2020 10:25 pm

as far as i know all mt75 rear wheel boxes are the same its just the axle thats diffrent

i have had many boxes repaired and they have never mentioned gear ratio in it


always thought it was axle ratio that makes the difference at top end
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Re: MT75 Box with 0.76 5th Gear Ratio

Postby Airthies » Sun May 17, 2020 12:56 am

A 4.63 is not a fast diff, spend your money on a a lower ratio unless your gearbox is shot, then spend twice as much getting a low ratio diff AND another gearbox

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Re: MT75 Box with 0.76 5th Gear Ratio

Postby dieselhead123 » Sun May 17, 2020 1:34 am

PIO wrote:Hi All... Planning on doing a few long runs in my van and would like the ‘luxury’ of a taller 5th gear on my ear drums. Already have a 4.63 FDR fitted...

Thanks Michael


Gearbox service manual here;
http://www.super7thheaven.co.uk/wp-cont ... 5601gb.pdf

A few special tools need to be made, have fun!

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