Adapter Kit.. ‘39 trans to A/B engine.

[GeneBob]

I called Van Pelt about swapping out the gears/synchros and the person I spoke with said it would be very expensive to buy the whole set from them. He suggested finding the 39 or the 40-48? gears and synchros in a trans, then buying the parts that need to be replaced from Van Pelt.
The attachment of the Model B trans is different than the Model A so you have to match the flywheel housing/oil pan or something like that.

[Ruth]

Originally Posted by Charlie Stephens

You still need the parts of the kit that mount the pedals and support the wishbone. I am not sure they will work with the "B" transmission.

Charlie Stephens

Originally Posted by alexiskai

Not sure it would be cheaper – as Charlie says, you still have to adapt the B transmission to the A motor. It doesn't bolt right on. And it seems like there would be a greater supply (and thus lower cost) for V8 transmission housings and parts.

Thanks, I was thinking since the A and B blocks were basically the same the B trans would bolt up.

[jeepguy1948]

All I have to say about it all is that I have a Mitchell transmission and I love it. Still no synchro for first gear, Steve Mitchell tells me that there is simply not enough room in the case for them (for anybody that cares the synchros they use are from an early Mustang trans). They will sell you a trans with the stock ratios, or, they offer one with 15% higher second gear, and you can also get it with 15% higher first gear. Mine has the stock gear ratios (I bought it used) if given the opportunity I would get the higher second gear in a heartbeat. I would not get the higher first gear because you lose your “parade gear”. Also, I would add that I have never done business with anyone as nice as Cyndi and Steve Mitchell (Mel Gross is up there too).

[johnneilson]

Ruth,

The blocks are very similar, the pan and flywheel housings are very different.
The flywheel can be used in either case, the "B" is lighter stk and well, others are given a diet.
I have both the '39 box conversion and the T5 conversion. Both work well, it just depends on the application.

John

[alexiskai]

Originally Posted by johnneilson

I have both the '39 box conversion and the T5 conversion. Both work well, it just depends on the application.

How would you describe the optimal application for each of those?

[johnneilson]

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Originally Posted by alexiskai

How would you describe the optimal application for each of those?

For me, the '39 trans with Mitchell OD is good for touring and parading.
Mine has a healthy flathead motor and will cruise all day long.

My other coop is more of a hotrod, QC rearend, T5 and OHV motor.
Full synchro and quicker to shift with really light flywheel.
It also makes removing trans for access to clutch easier with open driveline.

Thanks for asking, YMMV, John

[hardtimes]

Hey Floats,
I use a zephyr gear set… in the ‘39 ford gear box.
Best synchros for more smooth shifting , zephyr gear set for higher gear ratio… second gear.
There are TWO zephyr gear set ratios.. better/ best.
Van Pelt trans book is worth the $.