The Ford Barn

Gav73 · 10-09-2013, 01:54 AM

Hi guys,

I'm looking at replacing the original 36 gearbox with a 39 for a smoother changing box. Can anyone think of good or bad points, or a completely different idea. I want to keep it a manual and a floor shift.

Mart · 10-09-2013, 02:57 AM

A very common and popular swap. The synchro design is more modern and efficient. The rear mount and clutch release parts from the 36 box will need to be fitted to the 39 box to make the swap.

Mart.

Kurt in NJ · 10-09-2013, 03:31 AM

The later innards will fit into the original case if you have a numbers matching original trans ---I put the innards from a perfect 46 trans I had kept from when i had a 46 in mine

Mac VP · 10-09-2013, 05:02 AM

If you don't have a 39 shifter housing with the 3" fork, you can put the same 3" second/high fork in your 1936 shifter housing. This fork is necessary to operate the 39-48 synchro gear properly.

You keep all the same '36 rear retainer and mount parts. If you have obtained a complete 39-48 trans for this swap, be sure to use the complete gearset. Naturally, you'd want to replace all bearings, thrust washers, and probably the bronze synchro rings.

Walt Dupont--Me. · 10-09-2013, 05:52 AM

Sponsored Links (Register now to hide all advertisements)

While we're on the subject, the late gears will also fit into a Model B trans case. I have a B engine and trains in my 31 A with gears out of a 41-48 trans and a 39 top shifter. I like to let guy that own a stock Model A drive my car, they cain't believe how smooth it shifts. I also had the B flywheel lightened and redrilled for a 9in. V8 clutch, It's a lot smoother pressure plate than a Model A. Walt

10-09-2013, 01:54 AM	#1
Gav73 Junior Member Join Date: Jul 2011 Location: Brisbane, Australia Posts: 12	Updated gearbox for a 1936 coupe Hi guys, I'm looking at replacing the original 36 gearbox with a 39 for a smoother changing box. Can anyone think of good or bad points, or a completely different idea. I want to keep it a manual and a floor shift.

10-09-2013, 02:57 AM	#2
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,752	Re: Updated gearbox for a 1936 coupe A very common and popular swap. The synchro design is more modern and efficient. The rear mount and clutch release parts from the 36 box will need to be fitted to the 39 box to make the swap. Mart.

10-09-2013, 03:31 AM	#3
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Updated gearbox for a 1936 coupe The later innards will fit into the original case if you have a numbers matching original trans ---I put the innards from a perfect 46 trans I had kept from when i had a 46 in mine

10-09-2013, 05:02 AM	#4
Mac VP Senior Member Join Date: May 2010 Location: Cincinnati, OH Posts: 1,361	Re: Updated gearbox for a 1936 coupe If you don't have a 39 shifter housing with the 3" fork, you can put the same 3" second/high fork in your 1936 shifter housing. This fork is necessary to operate the 39-48 synchro gear properly. You keep all the same '36 rear retainer and mount parts. If you have obtained a complete 39-48 trans for this swap, be sure to use the complete gearset. Naturally, you'd want to replace all bearings, thrust washers, and probably the bronze synchro rings. __________________ VANPELT SALES LLC Cincinnati, Ohio Office: 513-724-9486 www.vanpeltsales.com www.classictransmission.com

10-09-2013, 05:52 AM	#5
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Updated gearbox for a 1936 coupe Sponsored Links (Register now to hide all advertisements) While we're on the subject, the late gears will also fit into a Model B trans case. I have a B engine and trains in my 31 A with gears out of a 41-48 trans and a 39 top shifter. I like to let guy that own a stock Model A drive my car, they cain't believe how smooth it shifts. I also had the B flywheel lightened and redrilled for a 9in. V8 clutch, It's a lot smoother pressure plate than a Model A. Walt