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Do wagons have 31 spline?

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steevil View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steevil Quote  Post ReplyReply Direct Link To This Post Topic: Do wagons have 31 spline?
    Posted: 26-January-2016 at 8:14AM
I have an opportunity to buy a 9" third member complete with 3.00 gears for cheap! It's out of a 66 T-bird and is 28 spline.   My question is, do STATION WAGONS automatically come with 31 spline axles?

My 1970 Fairlane Station wagon was originally a 351 car and has factory disk brakes and trailer hitch. I read somewhere that this was part of the optional tow package.   

When I bought the car, it already had a 429 installed and 3.91 gears. The 3.91s are too steep for highway use and I'd like to swap back to the 3.00 gears. 

I know it's as simple as pulling out an axle and checking but the car is buried in snow outside. Any help is greatly appreciatted.  
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1930 Model A sedan
1970 Fairlane 500 Wagon
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nuggets Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 8:19AM
what does the end of the shaft look like? two dots or a bath tub?
Barnaby

429 powered 73 Stripper.....no comfort, just noise!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Big Bird Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 8:27AM
From the factory, it should have been 28. (may even have been an 8" rear)
If someone went to the trouble to install a new drivetrain and gears, no telling what else was done...
The above post should be read in a "Grumpy Old Man" voice.
Almost forgot: "Get off my lawn!!!"
Randy
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steevil View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steevil Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 12:31PM
The door sticker is tough to read...it's almost destroyed. The axle has a bath tub indent on the end. The axle code is "9" and another digit that I cannot read.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67gt5003119 Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 1:01PM
"The axle has a bath tub indent on the end" that is a 28 spline axle.
Your wagon will have a 28 spline factory even if it is a "2 dimple" or "bathtub" marked axle shaft. My CJ GTS had a dimpled axle shaft and my H code GTS had the bathtub axles. Both were 28. Only in the mustang world is the dimpled axles 31 spline.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steevil Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 1:25PM
That is excellent news! I found a relatively new 3.00 open center section and only $150! Allegedly has new bearings and was only used for about 6 months.  A nice as a traction-lock would be, I don't plan on drag racing or anything, more concerned about drivability.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Big Bird Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 2:09PM
Before you install it, make SURE it has a fill plug. Some early 9" centers don't have them, as they were filled thru a plug/hole in the housing.
The above post should be read in a "Grumpy Old Man" voice.
Almost forgot: "Get off my lawn!!!"
Randy
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 26-January-2016 at 4:39PM
Originally posted by Big Bird Big Bird wrote:

Before you install it, make SURE it has a fill plug. Some early 9" centers don't have them, as they were filled thru a plug/hole in the housing.
good point! years ago my dad got a 76 f100 4x4 and it didn't have a plug in the housing nor a plug in the 3rd member, we had to fill it by removing the vent tube fitting Thumbs Down
JOHN
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steevil Quote  Post ReplyReply Direct Link To This Post Posted: 27-January-2016 at 11:25PM
Good call! I'll have to check it out.  It's out of a 66 Thunderbird so hopefully it should have a fill plug.

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