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Thread: Oldsmobile motor position problem

  1. #1
    Join Date
    Aug 2008

    Oldsmobile motor position problem

    I have the motor in my '73 H/O installed, with a TH200-4R transmission. From what I am seeing, the motor mounts do not differ from big-small block. The trans mount is the same height as well. I see no evidence of any frame damage, and my crossmember measures the same as others that I have.

    My problem is that the motor noses down at the front. To keep the fan from hitting the shroud, I need to use a 1" spacer to hold the shroud lower. this in turn keeps the lower bolts from aligning. My thoughts are that the motor may be sitting low, or the trans may be sitting high. Has anyone ever seen this?

    Also, does the OD trans have the same spline count as the driveshaft piece from the TH 400? Would the TH400 spline physically fit into the 220-4r? I'm not sure if I have the driveshaft from the car, or maybe the one from a TH 350. I thought I got the yoke with the car, but it does not look like there is a new U joint at the front.

  2. #2
    Join Date
    Mar 2007
    It sounds like the trans mount is too high.
    76 Cutlass Supreme Braugham (3)
    73 Cutlass Supreme
    66 Olds Ninety Eight LS (expired)
    78 Cadillac Seville (350 Olds engine)
    Several Caddys and a 76 Camaro and
    70 Impala Convertible

  3. #3
    Join Date
    May 2010
    Northern NJ
    I just replaced the clutch and fan on my 73 H/O - same problem.. fan rubbing at the bottom of the shroud. Shimming the top worked for me but I plan on replacing motor and trans mounts next.


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