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Clutch Release Bearing

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by IrishCJ6, Apr 27, 2018.

  1. Apr 27, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
    Joined:
    Dec 6, 2010
    Messages:
    368
    Hi all,

    I'm planning a t18 swap to replace my t150 that's currently in my CJ6. The Jeep has done minimal miles but I believe my clutch release bearing is on the way out. I want to replace this when I do the swap and want to have the right bearing ready to avoid delays. I believe the same clutch will work in the T18 from what ive read but I can't remember the part number and Rockauto has a number of different options so I'm confused. If my memory serves me right the one I used in the t150 was the bearing that had the backing plate on it?

    Just to make it easy here is my original setup

    AMC360, T150, D20

    Planned swap

    AMC360, T18, D20

    Any help would be appreciated
     
  2. May 3, 2018
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
    Joined:
    Jan 15, 2011
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    1,551
    If you plan on swapping a transmission, i would likely put a new clucth/pressure plate since you have everything appart.

    Last year i change the clutch on my cj5, amc360/t18/dana 20 and the lufkin clutch kit i bought has all the part you need in the kit. It has the clutch/pressure plate/throw out bearing and alignment tools so you cannot mess with the part.

    Only thing that you make look seriously is the o.d of the input shaft, it could be 1 1/8 or 1 1/16".

    I would also look at the flywheel, i resurfaced it at our local engine shop, i wanna make sure i wont have problem after the install.
     
  3. May 3, 2018
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor

    cordele, Ga.
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    johneyboy03 likes this.
  4. May 3, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
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    18,798
    The transmission should not affect the pressure plate, release fork or length of release bearing. That's mostly determined by the geometry of the bell housing and height of the release fingers. You will need a clutch disk that matches the diameter and number of splines of the T-18. The pilot bearing must be at the right distance from the front of the transmission to support the pilot tip, and have the right inner and outer diameter to fit the pilot tip and crank resp. Pretty sure Novak discusses the length of the input shafts of these Ford transmissions (T-18 and T-150) and what you need to do to fit and support the pilot tip. The inner diameter of the release bearing has to slide on the outer diameter of the T-18 bearing retainer, so that may be another issue (I expect they will be the same, but I'm not certain).

    I kinda think your expecting to have all these parts on hand and ready is a little unrealistic. It's a swap, and you'll have to evaluate the parts you have as you go along.

    hth!
     
  5. May 3, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
    Joined:
    Dec 6, 2010
    Messages:
    368
    Thanks guys,

    The T18 is coming out of a 79 J20 with an I6 engine in it so it should contain all the same parts as my current setup and have a shorter input shaft than the one normally found behind the V8. I'm taking the T18 out this weekend so I'll have a better idea then on what I'm dealing with.

    Can anyone tell me what size my current T150 pilot bearing would be?
     
  6. May 3, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
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    Dec 6, 2010
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    Yes I've read this and many more, however I'm starting with a Jeep T18 and a I6 version that seems different to what you guys normally see in the US.
     
  7. May 3, 2018
    sterlclan

    sterlclan Member Sponsor

    exploring the...
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    i think you will need a new one,fwiw if you are using the bell housing from the j20 that is what i would get the kit for it should have everything you need. the v8 flywheel should have the same holes as the 6 so the clutch should fit.
     
  8. May 3, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    You have something messed up somewhere. The 1975 Jeep did not come with a Tremac T-150. Instead it came with a Borg-Warner T-15.

    It's important that you get this right, since there are significant differences that are important with this J-truck transmission.

    A T-15 will have "13-07" cast into the case. Jeep Transmissions: T-15

    A T-150 will have a number starting with 260. Jeep Transmissions: T-150
     
  9. May 4, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
    Joined:
    Dec 6, 2010
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    Timgr

    Yes you are spot on, my jeep actually had a t14 from factory (according to the codes on the plate) however if you can remember from my build log someone before me had removed the I6/t14/d20 setup and put a Mercedes diesel in it's place. I then brought an AMC360 and a T150/d20 to replace the Merc lump. So at the time installed the correct clutch and pilot bearing to suit. It's around 6 years ago now so that's why my memory is failing me on part numbers and sizes. My D20 now has bearing issues and I have access to the t18/d20 setup for free so I thought it would be a no brainer to swap over at this point.
     
  10. May 4, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    How much do you have from the truck?

    The easiest approach is to bolt on the bell housing and transmission as it came from the truck. The T-18 in a 258 J-truck uses the same bell housing and adapter as the T-18 used in the 1975 CJ-5 T-18. If you have the bell housing, plate adapter and transmission from the truck, using this transmission will be fairly straightforward. Choice of clutch parts will be clear. The T-150 bell housing will not work with this transmission.

    Has the T-18 been in a CJ or is it coming from a truck?
     
  11. May 4, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
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    I have the complete truck, a friend of mine is planning a Cummins 6bt conversion for the J20 so offered me the full engine/trans setup. The truck is a UK original however it was crudely converted to RH drive. The tag states it had a different box originally (t15 I think) which has us all confused of when the t18 was installed. As far as I know it's a genuine J20 t18 setup but will only know for certain when we pull it out which will be on Monday. The plan was to use the complete setup in the J20 (bellhousing back) in my CJ6
     
  12. May 4, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    Ok, you have a complete J-truck with a 258 that was swapped to a T-18 at some point. You need to determine whether it is a Ford T-18 that has been adapted to the Jeep transfer case, or you have a T-18 that was transplanted from a similar J-truck.

    If it's a transplant from another J-truck, you then pick the parts that correspond to that application. If it's not a Jeep transmission from another J-truck, and you don't have a notebook kept by the previous owner of the J-truck that catalogs the parts used, you'll have to take it apart and look at what you have.

    BTW there are no J20s with 258s in the USA. Export only.
     
  13. May 4, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
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    Yep that looks like what will be done, I'd be very surprised if the t18 is a Ford derivative as I would imagine Ford's with the t18 found in the UK in the 70s/80s would be rarer than the J20 itself. I can't find any information suggesting that a 79 J20 come with any other gearbox than the T18 so it has us all a little stumped. I'll soon have my answer though
     
  14. May 4, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
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    In the USA, a '79 J20 only came with a single engine, the 360 2V. It could be purchased with the T-15 3-speed, T-18 4-speed or TH400 automatic. These manual transmissions would have the long input shaft and thick adapter characteristic of the V8 application. A J10 could be purchased with a 258 and those transmissions, but would be the short input and thin adapter configuration also used in the close ratio T-18 offered for the '72-75 CJs and '72-73 Commando. Look at page A-12 in the '79 TSM.

    If you buy the '74-80 parts book, export coverage will be (mostly) shown. Not present in the TSM. There may have been a supplement for export vehicles that varied by country.

    I recall export J20s could be had with the 258 and with a short bed. Both these options were not available in domestic production.
     
  15. May 7, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
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    New post created under T18 into CJ6
     

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