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Thread: tranny and t-case id

  1. #1

    Default tranny and t-case id

    i am working on a 1979 cj5 that originally had a 258,3spd according to the vin. it now has a ford 390fe engine with a t18 and dana20 (99% sure)this is what it says on the driver side of the tranny. it is a 4spd and reverse is all the way over to the right and down. is it possible to tell what 1st gear is by the numbers or do i have to wait till i remove the ford big block to spin the input shaft

    18-09-065-905
    wg/wm div
    borg warner
    muncie ind
    h 8-78

    the tcase says
    c-18-15-24-6
    8150
    and on the tag it says
    30900
    457719

    thanks in advance
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  2. #2
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    Icon5a

    Hi, FWIW: a picture would be best. Can you post any?
    Respectfully,
    LG

  3. #3
    Registered BruceW63's Avatar
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    Chances are very strong that it has a 6.32:1 first gear. VERY STRONG.

    And let's put it this way: drop it into 1st and let out the clutch. There's no way you can't know the difference between a granny gear and a 4.0:1.

  4. #4

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    Quote Originally Posted by Lumpy Grits View Post
    Hi, FWIW: a picture would be best. Can you post any?
    Respectfully,
    LG
    i will try and post pic's tomm,
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  5. #5

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    Quote Originally Posted by BruceW63 View Post
    Chances are very strong that it has a 6.32:1 first gear. VERY STRONG.

    And let's put it this way: drop it into 1st and let out the clutch. There's no way you can't know the difference between a granny gear and a 4.0:1.
    it either has some decent gearing or it has a highway gear and a granny.
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  6. #6
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    The first gear in the T18 was not synchroed so that might give you indication.. I believe the numbers you posted are for the T18... The reverse is to the right and down in the later 70's models. If you put it in first and it sounds like a bread truck it's a T18 especially if it has a PTO port on the side of the tranny.. I think it has six bolts holding on a 2" x 4" plate.... I believe on the passenger side....

    -Nick
    Nick


    79 CJ7
    304/T18/D20
    4.56's/ Detroits/ Alloy Shafts
    35 BFG Muds

  7. #7

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    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  8. #8

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    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  9. #9

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    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  10. #10
    Registered HackFabrication's Avatar
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    How's that 390? Should have more than enough grunt to push the snow around.

    Are those 34x9.50 TSL's? Any idea how much lift on the CJ?

    Edit: Oh, and that's a different looking trans/tcase. Most T18's had 13 01 cast into the side, the earlier Ford's might have had T18-1E according to Novaks knowledge base: http://www.novak-adapt.com/knowledge/t18_t19.htm And the PTO cover would be on the passenger side on the Ford T18's. The Jeep versions had it on the driver's side. And that trans mount really has me wondering too. Weird. I'm wondering if this is a T98?

    Here's a pic of my mid-80's Ford T18 with Ford bellhousing and AA Dana 20 adapter:


    The Tcase has me wondering, because the trans adapter is about 1" thick for T18/Dana 20 combo. It doesn't look like there is an adapter in your pics. Is there?

    I know Ford used the Dana 20 in the 66-77 bronco's but it was a driver's side drop version (with a different gear ratio). What you've got looks like a Dana 20. But the IH scout Dana 300 also had the Texas style bolt pattern. Strange.

    All speculation on my part....

  11. #11
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    I think I see and adapter just forward of the tcase mounting flange. Looking at the top bolt of the mounting pattern you can see a differentiation of surfaces.

    That looks like a Scout Dana 300. The easiest way to tell a greasy 20 from a greasy 300 is with a magnet on the rear output shaft housing. If it sticks, it's a Dana 20. If it doesn't it's a Dana 300 as the housing is aluminum on a 300.

  12. #12

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    [QUOTE=HackFabrication;8666712]How's that 390? Should have more than enough grunt to push the snow around.

    Are those 34x9.50 TSL's? Any idea how much lift on the CJ?

    Edit: Oh, and that's a different looking trans/tcase. Most T18's had 13 01 cast into the side, the earlier Ford's might have had T18-1E according to Novaks knowledge base: http://www.novak-adapt.com/knowledge/t18_t19.htm And the PTO cover would be on the passenger side on the Ford T18's. The Jeep versions had it on the driver's side. And that trans mount really has me wondering too. Weird. I'm wondering if this is a T98?

    Here's a pic of my mid-80's Ford T18 with Ford bellhousing and AA Dana 20 adapter:

    the 390 is a torque monster, kinda scary actully,ford big block, fiberglass tub, lightweight powerfull combo. and yes those are 34x9.5 swampers.i think it has a 2 1/2" superlift lift in it
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  13. #13

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    so i was poking around on novac's site and i found out what tranny it is. it has pto ports on both sides and i popped the tranny cover in side the cab and it said
    t19-148
    so i have a t19 and a ? t-case
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  14. #14
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    The tcase is either a Dana 20 or a Scout D300. Info on how to tell the difference already posted. The T19 has a synchro'd first gear. Good to have.

  15. #15

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    i forgot to post the tail housing is magnetic so must be a dana20
    again thanks for all the info
    86 cj7,injected 258,t18,300,60 front,14bolt rear,
    38"swamper on h1 rims

  16. #16
    Registered HackFabrication's Avatar
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    If it is in fact a T19, then the gear ratio is still up for grabs. Although I'd wager it's probably the 4.02:1 (or so) gearing common to the T19, and not the rarer 6.32:1 syncro'd version that Ford put in their F500 trucks.

    I'm still not certain about the Tcase. Did the Scout Dana 300's have the aluminum tail housing? Anyone? If not, a previous owner may have swapped in a trans/tcase unit out of an IH Scout.

    Again: All speculation on my part. And still curious...

    PS: I might go with those 34x9.50 tires for trail use on my CJ5 with the 2.5" lift when the 32x11.50's I've got wear out. I'll bet they really howl on the highway...
    "In the end...It's all Hack."

  17. #17
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    Quote Originally Posted by HackFabrication View Post
    Did the Scout Dana 300's have the aluminum tail housing?
    Yes

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    Quote Originally Posted by Snowtow View Post
    That looks like a Scout Dana 300. The easiest way to tell a greasy 20 from a greasy 300 is with a magnet on the rear output shaft housing. If it sticks, it's a Dana 20. If it doesn't it's a Dana 300 as the housing is aluminum on a 300.
    I can confirm that the x-case is not a Scout D300. The Scout D300 has the speedo cable on the inside of the back housing.
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