47 mercury rearend

[Don]

Found a rearend from a 47-48 Mercury,and would like to change out the 4-11 that’s in 36 pickup,I believe it about 1 1/2 inch wider !and the drive shaft is longer,...does the scallop flange on drive shaft mean anything,? Can I change the shaft from 36 into 47? Would have to shorten shaft housing also or would the gears fit36 rearend?Still need to find the ratio of mercury before doing anything

[V8COOPMAN]

You'll never notice the width difference at only 3/4" per side. In fact, that little bit should make it !ook about perfect in my opinion. The only problem I foresee is the difference between six spline and ten spline at the drive shaft/pinion juncture. You'll have to get a little creative with adapting radius rods to the '36 torque tube, like moving the mounting lug farther to the rear to accommodate the Merc radius rods. Very do-able! DD

[Barn Junk]

Installing a solid driveshaft (6-spline) and corresponding driveshaft housing from about a 1937-40 Ford should solve your problem. And yes the radius rod mount will probably need to be adjusted.

[V8COOPMAN]

Originally Posted by Barn Junk

Installing a solid driveshaft (6-spline) and corresponding driveshaft housing from about a 1937-40 Ford should solve your problem. And yes the radius rod mount will probably need to be adjusted.

Ya know, there's the perfect solution....'37-'40 drive shaft, torque tube and radius rods. The radius rods only need spacers at the mounting lug on the torque tube to fit-up properly. DD

[deuce lover]

Isn't the Merc driveshaft and pinion a solid unit?

[Mart]

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^^ Don't quote me on this, but while that is correct, it only applies to certain years. 39/40 somewhere around there.

Mart.

[Don]

I did find info on one piece drive shaft was 39-41.....I also think it’s doable,but need to find the ratio,pretty sure the hubs are locked,looked for numbers on web but didn’t see any,maybe take a wire brush to it

[Karl Wolf]

Originally Posted by Mart

^^ Don't quote me on this, but while that is correct, it only applies to certain years. 39/40 somewhere around there.

Mart.

I have a 3.54, out of a 1946 Merc, and a 3.78 out of a 1947, both have a one piece pinion- drive shaft.

Karl

[Mart]

^^ Ok, Wow, I was just relaying what I had read. Nothings cast in stone with these old Fords. (Ok, Mercs, you know what I mean).

Mart.

[Don]

Dont guess there is anyway to tell unless you take apart??