The Ford Barn

randymo9 · 11-05-2014, 08:17 PM

my 40 coupe has a worn rear . can I use a rear from a 46 to 48? I know the torgue tube and wishbones won't work but can I use the center and axle housings on my 40 thanks randy

Andy · 11-05-2014, 08:25 PM

46-48 rears are wider so the axles and bells are different.

ford38v8 · 11-05-2014, 10:30 PM

You can use the center section. Axles, bells, and torque tube from your 40. You'll likely wind up with a good ratio of 3.78 x 1, an excellent all around gear ratio.

bobH · 11-06-2014, 01:39 AM

Lots of 46-48 came with 3.54's. Of course, there are also a lot of 4.11's out there. As noted, 46-48 is wider, so the advice on using your 40 bells & axles & TT is a good idea. If you try to use the 46-48 'as-is', look for tire clearance issues at fenders.

randymo9 · 11-06-2014, 07:15 AM

thanks for the advise randy

Kube · 11-06-2014, 08:53 AM

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There won't be any issues with tire clearance. The later assembly is only about 3/4" wider than your '40.
You can install it but will need to place a 3/8" spacer between each radius rod and axle housing attachment point.

Old Ford Addict · 11-06-2014, 09:07 AM

The 40 I put together for my dad came to me with a 46 or 47 already in it

I left it in ..... fits and works fine

11-05-2014, 08:17 PM	#1
randymo9 Member Join Date: Oct 2012 Location: hainesport nj Posts: 49	1948 rear axle fitment to 1940 my 40 coupe has a worn rear . can I use a rear from a 46 to 48? I know the torgue tube and wishbones won't work but can I use the center and axle housings on my 40 thanks randy

11-05-2014, 08:25 PM	#2
Andy Senior Member Join Date: May 2010 Location: Kerrville, Tx Posts: 2,769	Re: 1948 rear axle fitment to 1940 46-48 rears are wider so the axles and bells are different.

11-05-2014, 10:30 PM	#3
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,641	Re: 1948 rear axle fitment to 1940 You can use the center section. Axles, bells, and torque tube from your 40. You'll likely wind up with a good ratio of 3.78 x 1, an excellent all around gear ratio. __________________ Alan

11-06-2014, 01:39 AM	#4
bobH Senior Member Join Date: May 2010 Location: so cal, placerville, vegas Posts: 1,394	Re: 1948 rear axle fitment to 1940 Lots of 46-48 came with 3.54's. Of course, there are also a lot of 4.11's out there. As noted, 46-48 is wider, so the advice on using your 40 bells & axles & TT is a good idea. If you try to use the 46-48 'as-is', look for tire clearance issues at fenders.

11-06-2014, 07:15 AM	#5
randymo9 Member Join Date: Oct 2012 Location: hainesport nj Posts: 49	Re: 1948 rear axle fitment to 1940 thanks for the advise randy

11-06-2014, 08:53 AM	#6
Kube Senior Member Join Date: May 2010 Location: Wisconsin, USA Posts: 8,993	Re: 1948 rear axle fitment to 1940 Sponsored Links (Register now to hide all advertisements) There won't be any issues with tire clearance. The later assembly is only about 3/4" wider than your '40. You can install it but will need to place a 3/8" spacer between each radius rod and axle housing attachment point. __________________ "I can explain it for you. However, I can't understand it for you".

11-06-2014, 09:07 AM	#7
Old Ford Addict Senior Member Join Date: Feb 2014 Location: Nor-Cal Posts: 140	Re: 1948 rear axle fitment to 1940 The 40 I put together for my dad came to me with a 46 or 47 already in it I left it in ..... fits and works fine