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Old 01-17-2020, 02:38 AM   #15
ford38v8
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Location: SF Bay Area
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Default Re: 1936 ford diff gear change

Quote:
Originally Posted by Brian View Post
Special tools; hub puller, and a spring spreader would be handy too. Tools to remove and replace the oil seals inside axle housings. A press for removing old pinion assembly from banjo

Quote:
Originally Posted by Brian View Post
Now that's getting technical Lawrie; I hold pinion shaft in a vice and spin the banjo as hard and fast as I can. Should only spin about 3/4 turn. OK, shoot me down....I learnt that system here on the 'barn somewhere....All I know is that it works.
Quote:
Originally Posted by JM 35 Sedan View Post
I'm thinking the other guys have covered everything necessary on special tools, but would just like to mention that I rebuilt the rear in my '35 fordor sedan last summer using 3.54 gears with 6 spline pinion. I used the original '35/'36 tubular type driveshaft, and bored the ID of the 10 splined bung on pinion end to provide a press fit with a stock 6 to 6 spline coupling. We milled two openings thru to the ID, 180° apart, on the 10 splined bung, about 1/4" back from the original weld holding the bung to shaft tube, prior to pressing the 6 to 6 spline coupling in place. After the coupling was pressed in place, we welded the 6 to 6 spline couplings in place thru those two milled slots, while keeping the pin holes in the coupling and bung aligned. This locks the 6 spline coupling in place and prevents damaging/distorting at the begining of the splines if attempting to weld there.
We rebuilt the transmission using the later, '39 - '48 improved syncro gears with a 29 tooth cluster gear and an input shaft with a 15 tooth gear. This combination of trans and rear gears gives very smooth acceleration off the line in first gear, without the need to slip the clutch to get moving.
I'm also running a '35 21 stud engine, with poured babbitt mains, 0.030" over bore, and milled cast iron heads. I have no problems crossing over the mountains of Maryland, West Virginia, and Pennsylvania in high/3rd gear. With this combination, I like the 3.54 rear gears, much better than the 3.78 gears that were previously used in this car.
All of this, but with respect, a KRW type hub puller, never a three finger type.
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