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Help With Transmission Identification

Discussion in 'Early Jeep Restoration and Research' started by Rubicloak, Apr 10, 2019.

  1. Apr 10, 2019
    Rubicloak

    Rubicloak Member

    Nevada
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    Internet search turns up more Ford forums than Jeep. It is mated to a V6 Dauntless and D18 with overdrive. A search of T98-148C is fairly inconclusive, with a ford forum saying that the "C" denotes a 1960's ford tranny, however both Novak and AA said that the 148C is just a stamp number and has no meaning. I have read through several posts here but I think that their cases had the T18 on the side. I have talked to both Novak and AA and they both say that they think that it is a T98 and not a T18 but obviously the only way to know is to pull the top and start counting. Neither one had any idea as to what the L115 tag is for. The embedded image is of the top of the case. The two thumbnails are of the side of the case. The side of the case numbers are T98 1R 10W, and below that is the standard WG Division.

    20190202_155350.jpg
    20190410_171621.jpg
     
    Last edited: Apr 10, 2019
  2. Apr 11, 2019
    jeepstar

    jeepstar Sponsor Sponsor

    Sheboygan
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    That sounds like some pretty Sage advice right there.
     
  3. Apr 11, 2019
    Rubicloak

    Rubicloak Member

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    Agreed, I guess what I was trying to figure out is what make and decade this transmission would have been used in (was it a Ford, or was it a Jeep) or does it even matter since it is already mated? I think we can reasonably agree that it is a T98 and not a T18 and just need to pop the top to determine the ratio.

    Surely, someone knows what the L115 tag on top denotes (I found one thread that said the L115 tag is a date code, but it does not come up in any searches) or what the 1R 10W on the side denotes?
     
    Last edited: Apr 11, 2019
  4. May 8, 2019
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine!

    Twin Lake MI
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    Just bought a late 70 or 71 with the same setup. Mine is a 148h next to the T98 stamp
     
  5. May 8, 2019
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine!

    Twin Lake MI
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    I can’t see the adapter plate on the back of the tranny I bought. Is there one or is the tranny casting already setup for the Texas pattern on yours?
     
  6. May 8, 2019
    Rubicloak

    Rubicloak Member

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    I have an adapter plate on mine. What pattern is yours
     
  7. May 8, 2019
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine!

    Twin Lake MI
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    Not sure yet. It’s got a plywood body on it right now and is still sitting in the guys flooded yard. Not sure when I’m going to be able to get it to year into. Basically no body whatsoever. Parts Jeep at this point
     
  8. May 8, 2019
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine!

    Twin Lake MI
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    Tear not year
     
  9. May 8, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    The casting numbers are not always specific, but the transmission type on the side of the case is accurate, AFAIK. The T-18s can have T-98 on the cover, but I've never heard of a T-18 without "T-18" or "13-01" on the side of the case. If it's not a T-98, what would it be? Not a T-18, unless it's T-18 gears in a T-98 case (not sure that's possible). I'd guess it's an old conversion, and could have been an F134 with Jeep T-98 (offered optionally with the F134), or a conversion from a Jeep or Ford transmission. I somehow recall there were conversion kits for the T-98 back in the day, even though there are none available today... not sure if that would require a Jeep T-98. Note that it's not impossible to make your own adapter for any kind of transmission, as long as you have access to a machinist or machine shop.

    "WG DIV" is Warner Gear, division of Borg-Warner.

    Both the T-98 and T-18 are quite rugged. If there's no reason to repair it, I'd run it and be proud.
     
    Last edited: May 8, 2019
  10. May 9, 2019
    Rubicloak

    Rubicloak Member

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    ^^^^Thank you Timgr. I think that we can safely say that this is a T98, given the absence of the T18 on the side casting. Until I have the time to actually pull the top and do some counting, I am trying to decipher the following, which in the end may mean nothing. Some have suggested date codes or plant manufactured in, while others have suggested they identify jeep, ford or IH.

    I guess I want to know what it came out of.... Jeep, Ford or IH as supposedly there were ways to identify at one time?

    1) What does the screwed on little tag under the T98 denote on the cover
    2) What does the 148C in the casting denote
    3) What does the 1R 10W in the side casting denote
     
  11. May 9, 2019
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
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    More pieces to your puzzle--

    2.) T98-148 = Part # 48 = Top Cover = Ford, conv. cab ---From Warner - Copyright 1972 by Hollander Publishing Co., Inc.

    3.) T98-1R used on cases for Ford ('53 - 66) --My research notes--if they can be trusted!
     
    Last edited: May 9, 2019
  12. May 9, 2019
    Rubicloak

    Rubicloak Member

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    ^^^ Awesome! Thank you Dave! I knew someone would eventually have this info.
    So it is a 53-66 Ford T98.... Novak mentions that Ford stopped using it in 1964.
    One can also assume that since it does not have an "A" that it is a Ford T98 vintage 1948-1955?
    So being a Ford T98, this raises an interesting question. I will have to get under the heap and figure what transfer case it is mounted to since it has a 10 spline 1 1/8" input shaft. My setup also has an overdrive.
     
    Last edited: May 13, 2019
  13. May 9, 2019
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
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    This will aid in identification:
    T98 Gear helix on mainshaft is right hand, helix on countershaft is left hand. Has roller bearings on 3rd gear.
    T98A Gear helix on mainshaft is left hand, helix on countershaft is right hand. Has roller bearings on 3rd gear.
    T18 Does not use roller bearings on 3rd gear.

    Is your Reverse over & up? As an external check that narrows the possibilities slightly.
     
  14. May 9, 2019
    Rubicloak

    Rubicloak Member

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    Dave, I am not sure on the over and up or down as it will not slip over past 1st and 2nd gear. Will only go up and down between first and second, when you try to go over to third and fourth, it is like hitting a brick wall.
     
  15. May 9, 2019
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
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    Sounds like you're in the project mode? Which CJ is this?--if you don't mind sharing.

    You have similarities to my '67 CJ5---V6, T98? 4-spd, Dana 18 single stk w/ Warn overdrive. Final crawl ratio, I figure, is 1st =76.8:1----and in reverse = 89:32. But, I'm pretty much a flat-lander here in my part of Minnesota, so I won't have to try much in reverse! With 4th and the overdrive it rolls too fast--65 mph & beyond!
     
    Danefraz likes this.
  16. May 9, 2019
    Rubicloak

    Rubicloak Member

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    This is my 71. And definitely in project mode. Doing a full frame off.
     
  17. May 9, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    The Jeep transmissions have a tag under one of the top cover bolts. They are often lost, but if present would be a 100% ID.
     
  18. May 9, 2019
    Dave B

    Dave B Frankenjeep '67

    Northern Minnesota
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    Rubicloak, you may find some additional tidbits here (more re: the internal workings) >>>Borg Warner T98-A ***Always keep an open-mind on what model you have until proven!
     
    Last edited: May 9, 2019
  19. May 9, 2019
    Rubicloak

    Rubicloak Member

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    Thanks Dave. I already have that in my "watch" it is a very well done thread!
     
  20. May 10, 2019
    sgogpn

    sgogpn Member Sponsor 2019 Sponsor

    Glendale, AZ.
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    It "could" actually be the Jeep T18 with 4:1 1st gear that was an option behind the Daunt in 71 and earlier years. I'll have to look up the gear tooth count of the input shaft for the 4:1 as it escapes me at the moment. My 71 has one. As for the reverse, I'm not aware of any T98 that went over and down, although later T18's did. It's also intriguing that your case doesn't show the 'T18-1301" on the side of the case but that wouldn't necessarily surprise me. I've got a bunch of 18s and a couple of 98's in the shop. I'll check it out tomorrow. Now I'm curious...
    FWIW,
    Mike
     

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