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Maybe not the right forum but.. gearbox needed


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If the inner workings fit in my standard 3 speed box , then yes, I suppose that would work. But I dont know what the difference is between a 3 or 4 speed box..is the 4 speed box larger?

But do you need the inner workings or just a bare case?
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The inside parts of a 4 speed will not work in a 3 speed box and 3 speed parts won't work in a 4 speed box. You need (want)a 4 box w/internals. I don't know if the gearstick interchanges or not.

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there are differences in the 4 speed units for the 1/2, 3/4, 1T+ trucks dependant upon year.......

'37-'45 1/2 & 1T spur gear

'39-'45 3/4T """""""""

'48-'50 1/2 thru 1T spur gear with parrallel plug case#1195972, and spur gear with 30deg drain plug case #1268027. these two interchange by swapping MDG and retainer

'51-'53 1/2 thru 1T helical gear case #1393364

'44-56 1/2 - 1t spur gr case #1194253

'46-'53 pwr wgn spur gr case #921853

'48-'54 rte van spur gr case #1261863

'53,'54 1/2 , 3/4 truckomatic 4spd helical gear. case #1134931, 1137315, 1137365, 1400079

as was mentioned in another post, neither the top loader or the side loader 3 spd transmisions share anything with any 4 spd.

Bryan

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Not knowing exactly what the used parts supply is like 'downunder', you might consider a swap to the TK5 (different than t5) if you need a 4th gear and wouldn't mind having a 5th...

Do a search for 'ranger' and you will find a thread by Robert Horne showing his project. It appears to be even easier than the t-5 swap that so many folks 'just have to have'....

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