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Author Topic:   9" axles with 31spline and small bearings?
66 fstbk

Posts: 1
From: British Columbia, Canada
Registered: Mar 2002

posted 03-20-2002 05:57 PM     Click Here to See the Profile for 66 fstbk   Click Here to Email 66 fstbk     Edit/Delete Message   Reply w/Quote
HI: My first post ... I have a 31 spline traction loc with 3:50's and a late 60s short (42") tapered down housing off a Mustang, Cougar, Fairlane ?? Because of its end taper ala. 8" it takes the small bearings. Can a person get a 31 sline 5 on 4 1/2 axle that uses the small bearings? Do I have to go custom or can I salvage one?


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Posts: 1069
From: Gadsden, Al
Registered: Aug 99

posted 03-20-2002 07:16 PM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
Let me be the first to welcome you to Mustangsandmore. You will like it here. Lot's of knowledge. You will learn a lot.

Yes, you can get bearings for a 31 spline axle with a small bearing housing end. It's not a problem. You can call any of the axle mfg's if you can't find them locally. Moser has them for $30 each. Moser's site:

They also have stock reman axles from time to to time. If you need one you can check to see if they have they correct length.
National Drivetrain also carries stock 31 spline axles.

You say your housing is 42"? If so, that means it has been narrowed and is not even close to the 65-66 housing. They use a 52" housing. 67-70 is 54" and 71-73 is 56".


David Cole

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Posts: 45869
From: Saco, Maine
Registered: May 99

posted 03-20-2002 07:23 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Welcome to M&M!


'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

MCA Member # 47773

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kid vishus

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 03-20-2002 10:49 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
Welcome to M&M

member #773
'69 mustang, 351C, 9.97 @ 133 mph 1/4, 6.27 @ 108 1/8, 1.344 60'
'70 mustang, flintstone power
'93 F150 Lightning

My Photo Page

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Posts: 234
From: Hamilton, Ohio, USA
Registered: May 2001

posted 03-21-2002 12:02 AM     Click Here to See the Profile for MDF99   Click Here to Email MDF99     Edit/Delete Message   Reply w/Quote
Welcome to M&M

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Posts: 189
From: Fortson, GA, USA
Registered: Oct 2001

posted 03-21-2002 06:51 AM     Click Here to See the Profile for 67Coupster   Click Here to Email 67Coupster     Edit/Delete Message   Reply w/Quote
Like everyone else said welcome. I am new here also and this site is by far the best early model performance site on the web!!!!

67 Coupe
393W, AFR 185, 4 Speed, 4.11 9 inch
7.34 @ 96MPH 1/8
1.66 60'

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Posts: 44
From: Regina, Sk, Canada
Registered: Apr 2001

posted 03-23-2002 12:00 PM     Click Here to See the Profile for KenB   Click Here to Email KenB     Edit/Delete Message   Reply w/Quote
I just got my axels in last night - same kind of scenario you are running.

I put a 31 spline 3.50 traction lock center section from a 76 F-250 into my 69 Cougar with some axels from a 70 Torino that I had shortened about 1" or so. Can't tell you what the bearing numbers are now that they are pressed on but they were no problem to get. The seals were a bit more of a problem since it was hard to find a place that had them in stock, therefore if it helps, the seals that should fit your housing with the 1.5" diameter seal surface for the 31 spline will be a CR 14968 or National 9363S (same seals just different manufacturers). You should be able to go to Ford and get the part #'s for a 69-70 Mustang/Cougar/Torino, etc with a 31 spline rear end - they should be able to get the bearings and seals if they haven't obsoleted them like they have for the pionion shaft pilot bearing I found out. Dang I should have wrote the part # down of the one I found for future reference!


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Posts: 691
From: Port Alberni, B.C. , Canada
Registered: Mar 2001

posted 03-24-2002 02:32 AM     Click Here to See the Profile for bfxcomet   Click Here to Email bfxcomet     Edit/Delete Message   Reply w/Quote
Welcome to another, this is a great site .


65 comet project
84 T-bird
Made in CANADA built for speed

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