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D18 Rear Bearing Cap Question

Discussion in 'Early CJ5 and CJ6 Tech' started by FinoCJ, Jun 24, 2021.

  1. Jun 24, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,676
    Bob M and I are trying to figure out if there is a difference between the rear bearing cap for a 4" bore (large case) vs a 3" bore small case. Is the rear bearing cap interchangeable between the two size cases?
    Also, Is there a difference between a rear bearing cap with TC parking brake vs one without the TC parking brake? Without being able to see my own cj with the TC parking brake, I feel like it has to have machined flat surface for the backing plate to mount against?

    thanks all....
     
    Last edited: Jun 24, 2021
    FinoCJ, Jun 24, 2021
    #1
  2. Jun 24, 2021
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,192
    I'm pretty sure the rear bearing caps are the same (interchangable) between small and large cases. The Wagons/trucks don't have a brake drum assy like the CJs, so they are different. Trucks don't have the machined flat for the backing plate. I'm pretty sure I have interchanged CJ and truck rear caps when I wasn't concerned with a parking brake.
    -Donny
     
    Keys5a, Jun 24, 2021
    #2
    FinoCJ likes this.
  3. Jun 25, 2021
    Mr Vaughan

    Mr Vaughan

    the back of the bearing cap on my small hole 18 with a T case parking brake was fairly flat, but there wasn't much area where they met. (this is all what i remember, may be incorrect. don't really want to go check at 2:00)
     
    Mr Vaughan, Jun 25, 2021
    #3
  4. Jun 28, 2021
    BD1

    BD1 New Member

    northern Maine
    Joined:
    Apr 30, 2020
    Messages:
    10
    I believe the rear bearing caps will interchange just fine. But I don't see any way that you could mount the TC drum brake to a truck style cap. I have a truck transfer case in my 2a and I swapped the cap to a CJ one for the TC brake so I could have a parking brake. No issues other than a slight adjustment to the shim pack.
     
    BD1, Jun 28, 2021
    #4
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