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T-18 Input Shaft ?

Discussion in 'Early CJ5 and CJ6 Tech' started by Whitelighting, Sep 7, 2004.

  1. Sep 7, 2004
    Whitelighting

    Whitelighting New Member

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    My CJ-5 was a limited addition in 1971, it has a V-6 and a T-18 close ratio 4 spd. I'm trying to keep the stock throw out bearing and clutch linkage, plus I'm adapting a wide ratio T-19 out of a Scout. The adapter from Advance Adapters, adapts the T-19 to a Chev and it is very close to the same thickness of the stock T-18 adapters. In 1968 to 1971 Jeep Wagoneers and Jeep trucks came with 350 Buick motors and wide ratio T-18's. The T-19 and T-18 input shafts are interchangeable. I am trying to locate a new wide ratio T-18 input shaft for a 1968 to 1971 Jeep Wagoneer or truck. The overall length of the shaft is 12&7/8" + or - , the stickout length is 10&1/4" + or - , the tooth count is 17 and the clutch spline is 1&1/8" 10. I would appreciate any help with locating a source to buy an input shaft.
     
  2. Sep 7, 2004
    vanguard

    vanguard

  3. Sep 7, 2004
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    New? You mean new to you, yes? You could try http://www.ifsja.org/ubb/ultimatebb.php
    You might have to buy the whole transmission... The Buick 350 drivetrain is popular in FSJs, especially with a T18.

    Why do you want the T19 instead of an FSJ T18? The only difference is a synchro 1st gear. Making Scout transmissions work in a Jeep is usually a PITA.

    <edit> On second thought, this doesn't make a lot of sense. All of the FSJ manual transmissions I've seen have had a really long input shaft, and either an extended bellhousing or (later) a 3" or 6" (I6 & V8) spacer between the bellhousing and the transmission. The long stickout is needed to put the shifter back far enough in the cab in a FSJ. If the CR T18 paired to the V6 is like the same CR T18 later paired with the 258, it uses a plate adapter and a unique (and short) input shaft.

    BTW a '71 with a CR T18 is a rare animal, and you might want to leave it alone. If you need a higher crawl ratio, I'd suggest that you install Tera gears in the D18, or convert to a D300 with Tera gears. The D300 can be setup 4:1, so your crawl ratio would be 4*4*4 approximately.

    <edit 2> Shoot - where are my manners? Welcome from Boston! Don't worry if I seem overly critical - it's not you - it's an occupational hazard.

    Tell us more about your Jeep! Post in the Intro section!
     
  4. Sep 7, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Whitelightening: First of all, welcome from Havasu. Second, listen to Tim. ;)
     
  5. Sep 7, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
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    Howdy from W. MI.

    You own what's been called a "mythical Jeep" here in the forum...:) AFAIK, we've only heard about the V6 T18 CJ5's second or third hand....
     
  6. Sep 7, 2004
    vanguard

    vanguard

    what! :shock: jeepngem drives V6 with a T18. :D

    You should see it crawl! It's amazing.
     
  7. Sep 7, 2004
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Different T18 I'd wager ... wide ratio versus close ratio.
     
  8. Sep 7, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
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    Is Glenn's a factory V6/T18? If so I didn't realize... :oops:
     
  9. Sep 7, 2004
    vanguard

    vanguard

    Not sure, but I'm sure he will chime in. It really really really can crawl.
     
  10. Sep 7, 2004
    Boyink

    Boyink Super Moderator Staff Member

    Tulsa, OK
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    Probably a swap then, as I'm pretty sure Tim is right (and Whitelightning confrms) that the factory T18 was a close ratio.

    SSDutch crawls too (wide ratio T18 and 5.38's..)....it's too much for me!
     
  11. Sep 7, 2004
    Whitelighting

    Whitelighting New Member

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    I didn't realize that my Jeep was a "mythical Jeep". A Jeep dealer gave me an American Motors parts book that covers 1973 back to the CJ3-B.
    The "Mythical Jeep" is very real. The way you can tell the 70 - 71 factory T-18's is the floor boards, the three speeds had a rectangular cover,
    about 6" by 14",that went over the cain shifter, the 4 spds had one large cover that runs from the fire wall and terminates just under the drivers
    seat. You can't miss it.
     
  12. Sep 7, 2004
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    We need pics! 8) :stout:
     
  13. Sep 7, 2004
    Whitelighting

    Whitelighting New Member

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    I do a lot of rock crawling, 1st & 2nd are the two gears that I use most of time, being able to
    shift into 1st on the fly will be a definite improvement. If I can't find a Jeep input shaft then I
    will adapt the T-19 to Ford and use an adapter bell housing.
     
  14. Sep 7, 2004
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    jeepngems is a swap/conversion he performed many years ago
    but he did order the adapter and other parts necc from Jeep
     
  15. Sep 8, 2004
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Whitelighting, I have a long input shaft from a Jeep T18...

    When I bought my T18-B, it came out of a 70's full size Cherokee. I don't know what year, but it had a really long input shaft. I had a local shop swap out the shaft and do the install in my '71. I still have the long shaft out in my shed.
    I'll take some measurements/tooth counts tonight and let you know tomorrow...
     
  16. Sep 8, 2004
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Hi - I'm sure you have a good reason for wanting a synchromesh 1st. However, I expect the Scout T19 is more trouble than it's worth. The IH transmissions had their own cases, bolt patterns, clutch linkage and bellhousings that're usually not adaptable to other makes. I'd suggest you call Novak http://www.novak-adapt.com/knowledge/t18_t19.htm or R&P http://www.r-p4wd.com/site/products.htm and talk with them. Both reputable places and typically very helpful.

    Blairsden's near Lassen? On the Feather River?
     
  17. Sep 8, 2004
    Whitelighting

    Whitelighting New Member

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    Tim, Blairsden is in the northern Sierra's on the middle fork of the Feather river, about 45 min north west of Reno.
     
  18. Sep 9, 2004
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Whitelighting
    OK, I found the old shaft out in my shed. Here's the specs:
    It has a 17 tooth gear. The shaft is 1 1/8 - 10 spline
    Tip diameter is .750
    The overall length of the shaft, from the tip to the sprocket behind the gear is 15 7/8.
    The length from the tip to the front edge/face of the 17 tooth gear is 13 7/8.

    The shaft has some rust but is not pitted. The gear and sprocket are rust free and sharp edged, no chips, pits or rounding.

    I suspect this T18-B shaft was behind a 360... I know the donor was a full size Cherokee but I don't know the year/engine.

    Let me know if you are interested in this.
    Good Luck!
     
  19. Sep 13, 2004
    Whitelighting

    Whitelighting New Member

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    Lynn,

    I appreciate your help with my project, but your shaft is to long for my application. Locating a shaft doesn't look promising, when I started this hunt I didn't realize that parts would be so hard to find. Thank you.

    I e-mailed R&P and Novak, R&P responded but they could not supply a shaft, I'm still waiting for a response from Novak.
    Thanks to everyone for sharing their knowelge.

    Kent
     
  20. Sep 14, 2004
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Kent, here's another source.
    Try "Parts Mike" at
    www.partsmikeparts.com

    Mike sells alot of T18s ready-to-go for the typical CJ installation, already rebuilt and with the short shaft. I'll bet he has a bunch of the longer shafts available.

    Mike is a great guy and super-knowledgeable. Give him a call, I'd suspect you won't find this part on his website as it is normally considered a leftover after conversion.

    Another source might be Hicks 4 Wheel Drive. (do a 'net search for contact info) They were among the leaders in T18 conversions about 10 yrs ago.

    HTH, keep us posted!!
     
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