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50 - 55 Olds cross member question

Discussion in 'The Hokey Ass Message Board' started by ZZ-IRON, Jun 19, 2012.

  1. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    need some help
    Is a 55 Olds cross member different then a 50 Olds?

    i have a 50 Olds cross member in my 50 Olds coupe
    put a 55 Olds 324 in the coupe is not going well

    my thought is the slant pan is causing the cross member clearance problems


    drop it in bolt it up turns out it's not that simple :rolleyes:
     
    Last edited: Jun 19, 2012
  2. 1954 rocket 98
    Joined: Apr 18, 2011
    Posts: 215

    1954 rocket 98
    Member

    i have some good pics of a 54 olds cross member if your interested maybe compare the two. if your interested let me know.
     
  3. junkyardjeff
    Joined: Jul 23, 2005
    Posts: 7,243

    junkyardjeff
    Member

    I think all are different,when I put a 59 371 and jetaway in a 53 I had to modify a 59 cross member to use in the 53.
     
  4. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    the 50 Olds cross member

    [​IMG]
    there an indentation on one side shown on the chair
    [​IMG]
    this side is straight across
     
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  5. 1954 rocket 98
    Joined: Apr 18, 2011
    Posts: 215

    1954 rocket 98
    Member

    looks like the one i have. if you need any other views let me know.
    mine is straight one side and indented on the other. my 56 olds also had the same cross member.
     

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  6. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    GOATROPER02 said the 55 Olds is different then the 50 Olds

    50 to 53 are the same
    54 to 56 are different then the 50

    the 55 Olds slant pan is causing my clearance problem
     
  7. DWBlietz
    Joined: Jun 27, 2010
    Posts: 358

    DWBlietz
    Member
    from California

    did this swap 45 yrs ago and we used a 56 crossmember and had to take a little from frame x member to have clearance for the u-joint have fun Dennis
     
  8. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    dug this up out of the Hollanders 23rd edition
    they used a 54 Olds hydramatic & 54 Olds cross member in a 50 Olds 88
    [​IMG]
    so my 55 Olds drive train will be getting a 55 Olds cross member

    I Thanks ALL you Guys for the help
    and the last post from DWBlietz about the 56 Olds cross member

    so looks like i can get this handled with a trip to French Lake auto parts
     
    Last edited: Dec 19, 2012
  9. oldsmobum
    Joined: Apr 26, 2012
    Posts: 45

    oldsmobum
    Member

    Keep in mind, you need 55 rear motor mounts with that 55 trans. I am putting a 53 trans in my 55 right now, and I got screwed not having the right mounts. I am hoping that I don't have any issues with the crossmember. Good luck getting that in there.
     
  10. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    Thanks for the heads up
    i bought new 50 mounts (black) on Ebay and had 55 mounts ( green) on the Olds 324 motor
    which didn't work
    with the 50 cross member
    when i get the 55 cross member i'm going to exchange the new 50 mounts for 55 mounts

    [​IMG]

    black mounts are 1950 - green are 1955's off the Olds 324

    with luck i'll hear that bolted in the 324 Rocket 88 running this coming year

    when i checked mounts on Ebay 54 & 55 mounts were the same but not 53

    one other thing they have compatible lists to check mounts to year of car
    there different year groups to year groups that goes for front & rear mounts
    you can check yours on the links below

    the new mounts are very well made

    2 Rear Motor Mounts 49 50 51 52 53 Oldsmobile NEW
    http://www.ebay.com/itm/2-Rear-Moto...Year:1953|Make:Oldsmobile&hash=item484d6569fb


    2 Rear Motor Mounts 54 55 56 Oldsmobile NEW PAIR

    http://www.ebay.com/itm/310536089131?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
     
    Last edited: Dec 20, 2012
  11. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    I finally got the cross member problem solved
    read the note in Hollanders 26th edition
    about installing a 54 Olds Hydramatic in a 50 Olds 88
    they used 54 Olds cross member and rear mounts from a wrecking yard

    I went to French Lake auto parts Friday got a 55 Olds cross member
    used 55 Olds rear mounts and bolted everything together just like
    the article said
    [​IMG]

    when i lined up the 50 Olds & 55 Olds X member
    side by side the mounting angle looked different


    the rear mount compatible chart listed

    49 to 53 Olds are the same

    54 to 56 Olds are the same

    so that must go for the cross members being the same

    49 to 53 cross member

    54 to 56 cross member

    anyway glad that's over with
     
  12. wastedchilhood
    Joined: Feb 5, 2012
    Posts: 21

    wastedchilhood
    Member

    I have a 55 slant pan in Wastedchildhood. I had to drill 2 new holes and move it forward. You also need a 54-55 yoke.
     
  13. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    Thanks for the info
    I like Wastedchildhood cool looking Olds

    drilling holes - are you talking about toward the front of the car?

    my 55 Hydramatic came with a 55 yoke so that was a plus

    other then the yoke
    what did you do to the driveshaft ? any cutting ?

    my 50 Olds came with the stock driveshaft

    when i went to the yard Friday there were some 55 Olds driveshafts
    available if that's a quick option
     
  14. wastedchilhood
    Joined: Feb 5, 2012
    Posts: 21

    wastedchilhood
    Member

    Yes to the front.Support motor under the oil pan. Install bellhousing motor mounts and cross member. The rear hole in crossmember should line up with a hole in the frame.Get a compete 55 drive shaft.This will give you the big U joint in the rear. Get rear yoke from a 56 Pontiac and your bullet proof.
     
  15. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota

    Cool Thanks

    I have a complete 55 Olds drivetrain crossmember
    front & rear motor mount

    I can get the 55 Olds driveshaft & 56 Pontiac yoke at the yard
    Thanks again Great information :)
     
  16. magooz
    Joined: Jul 25, 2011
    Posts: 99

    magooz
    Member

    Hey,
    Just ran into that same issue. The '50 Olds rear crossmember won't let the rear rubber mounts sit right. Anybody have a '54 - '55 Olds rear crossmember they'll sell. Need it ASAP.

    Thanks MAGOOZ
    206-763-2438
    EMAIL= kmccand865@aol.com
     
    Last edited: Dec 31, 2013
  17. magooz
    Joined: Jul 25, 2011
    Posts: 99

    magooz
    Member

    Talked with Rob in Wa. and he turned us on to a friend back in the mid west, but we found one yesterday morning in upper Calif. for a reasonable price. Thanks for your help. You H.A.M.Bers are great! MAGOOZ
     
    Last edited: Jan 1, 2014
  18. ZZ-IRON
    Joined: Feb 28, 2007
    Posts: 1,964

    ZZ-IRON
    Member
    from Minnesota


    Any time, that must of been Skip at Flap

    Rob knows his Olds
    he said your going to look for a 54-55 X member
    for your car

    keep me in the loop on that - i have a 54 X now & new 55 rear mounts
    and a very cold garage i'll wait till it gets warmer
     

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