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Technical 1940 Ford Guys

Discussion in 'Traditional Customs' started by jumbogem29, Mar 23, 2025.

  1. jumbogem29
    Joined: Feb 2, 2010
    Posts: 623

    jumbogem29
    Member
    from Alabama

    Hello can you tell me what most is running tire size on your coupes . i was looking at the 700R-16 or the 750R-16 and the 600R for the front . Any pictures would be great trying to get the best stance on the old coupe thanks
     
  2. chevyfordman
    Joined: Oct 4, 2008
    Posts: 1,454

    chevyfordman
    Member

    The stance looks good but the rear end has to be dropped to get the tire out of the wheel well with 750's on my ex car. IMG_2542.jpeg
     
    50 Merc Man, Packrat, tubman and 4 others like this.
  3. corncobcoupe
    Joined: May 26, 2001
    Posts: 8,288

    corncobcoupe
    SUPER MODERATOR
    Staff Member

    I can’t remember what tire size I’m running, I think 16’s in the rear and 15’s in the front but will check next weekend.
    Here is some pics.
    IMG_4096.jpeg IMG_4090.jpeg IMG_4092.jpeg
     
  4. Moriarity
    Joined: Apr 11, 2001
    Posts: 34,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    8.20-15 rear and 5.90-15 front

    40ford3 (1).JPG 40fordd.jpg
     
  5. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 14,194

    Bandit Billy
    ALLIANCE MEMBER

  6. V8 Bob
    Joined: Feb 6, 2007
    Posts: 3,090

    V8 Bob
    ALLIANCE MEMBER

    205/70x15 fronts, 235/75x15 rears.
    upload_2025-3-24_8-31-54.jpeg
     
    okiedokie, putz, 50 Merc Man and 4 others like this.
  7. hotrodharry2
    Joined: Nov 19, 2008
    Posts: 869

    hotrodharry2
    Member
    from Michigan

    This thread is a help to me also! My 40 had skirts & lowering blocks in the rear. I’ve been looking at tire size! Mine currently are 205 65 x15. Also loosing the wide whites. Personal taste, isn’t that what Hot Rodding is all about?
    IMG_6787.jpeg
     
  8. @hotrodharry2 , if I was anywhere near that car, I'd probably put 195.70 on front and 225or 235/70 on the rear.
     
    hotrodharry2 likes this.
  9. I can imagine it's a PITA to change a rear tire but it looks & sits great. HRP

    [​IMG]
     
  10. 19Fordy
    Joined: May 17, 2003
    Posts: 8,262

    19Fordy
    Member

    Remember, when you "rake" a stock 40 Ford the rear end fluid gravitates into the torque tube, depleting the gear oil in the differential. Over time, the gear oil dissolves the rubber encasing the torque tube center bearing causing a vibration of the solid driveshaft.
     

    Attached Files:

  11. ....WOW!!:eek:
     
    hotrodharry2 likes this.
  12. This is very true. I know thee is a seal that can be installed between the Banjo housing and the T T flange. I'm currently trying to find more info on what it takes and where to buy one. I know I've also read about it here but so far the search hasn't turned up anything.
     
  13. 19Fordy
    Joined: May 17, 2003
    Posts: 8,262

    19Fordy
    Member

    Skip Haney on Fordbarn sells a replacement center bearing. Read this
    https://www.fordbarn.com/forum/printthread.php?t=186780 .
    The OEM bearing is shown in first photo below. They are very rare and expensive.
    Go over to www.fordbarn.com and do a search for Torque Tube Center Bearing. There was a fellow in Big Spring, TX who was making a seal (last4 photos) to prevent draining of gear oil into torque tube. ALSO, BE SURE AND READ THIS:
    https://www.fordbarn.com/forum/showthread.php?t=301624&highlight=torque+tube+center+bearing
     

    Attached Files:

    Last edited: Mar 25, 2025 at 8:04 AM
  14. 50 Merc Man
    Joined: Aug 2, 2020
    Posts: 519

    50 Merc Man
    Member

    Looks like the car my dad bought off a little old school teacher when he was in high school. His first car btw!! RIP Dad!!
     
    Moriarity likes this.
  15. corncobcoupe
    Joined: May 26, 2001
    Posts: 8,288

    corncobcoupe
    SUPER MODERATOR
    Staff Member

  16. corncobcoupe
    Joined: May 26, 2001
    Posts: 8,288

    corncobcoupe
    SUPER MODERATOR
    Staff Member

    7.50-16 Rear and 5.90-15 Front
    IMG_4464.jpeg IMG_4465.jpeg
     
  17. tubman
    Joined: May 16, 2007
    Posts: 7,666

    tubman
    ALLIANCE MEMBER

    I gotta ask : If those are the sizes on the tires, how the heck old are they? I had used 8.20-25 tires on the back of my '51 Ford in 1959; when I wanted to put them on my new Corvette, they has already been superseded by 9.15-15's. I haven't even seen a 5.90-15 in the last 60 years.:D

    Re-pop's maybe?
     
  18. Moriarity
    Joined: Apr 11, 2001
    Posts: 34,778

    Moriarity
    SUPER MODERATOR
    Staff Member

    warbird1 and lothiandon1940 like this.
  19. Mr.Norton
    Joined: Oct 2, 2006
    Posts: 81

    Mr.Norton
    Member
    from Sweden

    I have Firestone 8.20x15 rear and 5.60x15 front 20240630_111433.jpg
     

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