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WooHoo! Bought a Dauntless. Need help!

Discussion in 'Early CJ5 and CJ6 Tech' started by Kerrdog, Oct 24, 2008.

  1. Oct 24, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    I bought a Dauntless from a local guy. It will go in the 66 and replace the frozen 134. The motor was running when pulled. It has been stored under cover for about 3 years. The air cleaner is missing, but there is a plastic bag over the open carb. It includes headers but they are removed, and the ports have been open all this time. The oil is black but high on the stick. I tried to turn it over by hand but could not. I will bring it home next week, place it on a borrowed stand, and begin working on it. The guy I bought it from is a mechanic, and he feels like it should be made to run fairly easily. What do I need to do first so I don't do something wrong? I have never built an engine. The engine is complete with bellhousing. It should bolt right up to my T-14... right???

    Thanks All
     
  2. Oct 24, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    If you have the V6 T-14, the Buick bellhousing, and the plate adapter, it will bolt up. You can also use the Buick T-14 and 1971 Jeep bellhousing and thereby skip the plate adapter. There are a few different Jeep T-14s, including the one used from 72 to 75 behind the AMC 232 or 258, and the one used in pickups and wagons behind the Rambler 232.
     
  3. Oct 24, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    AAAUUGGGHHHH! Tim- How in God's world do you know all this stuff!? This 66 came with the 134. It is frozen and I am replacing it. It has a T-14 in it, but it has 4 sticks! Since I have been working on my 79 I haven't given the 66 much time. But my son is eager-er! The T-14 has the shifter, which is quite long. There is another shifter, almost the same length, next to it, then, what I am assuming, is twin sticks for the Tcase. Any insight on that setup??
     
  4. Oct 24, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    How do you know this is a T-14? Only the T-90 was used with the F134, all the way through '71. A T-14 will have T14A or 1302 cast into the side of the case. A T-90 will say T90.
     
  5. Oct 24, 2008
    EricM

    EricM Active Member

    Southern California
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    4 sticks?

    One for the transmission, 2 for the transfer case, the other must be for a pto or overdrive?
     
  6. Oct 24, 2008
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    In regard to the engine if it were mine I would pull the sparkplugs and pour Marvel Mystery oil,auto tranny fluid or kerosene into the cylinders and let the rings soak for a while. I would also spray some penatrating oil into the head ports and pull the valve covers and spray thru the valve springs onto the valve stems as best as you can. Reaply as needed for a few days and then attempt to turn it by hand again.Of course once you get it turning over you will need to drain the oil to get rid of the solvents.It also may be necessary to turn it upside down ,pull the oil pan and apply solvent to the underside of the cylinders of those pistons that are up the cylinder bore a ways
    .Patience is required.
    What to do next depends on your plans ...complete rebuild or just try to make it run?
     
    Last edited: Oct 24, 2008
  7. Oct 24, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    Duh! My Bad... sorry. You are correct. I can't say how T-14 got on my mind!? I was thinking T-14 all the way through the Dauntless purchase... did I mess myself up? Will the Dauntless bolt up to a T-90??



    How can I confirm either OD or PTO?
     
  8. Oct 24, 2008
    EricM

    EricM Active Member

    Southern California
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    Do you have any pictures?

    a warn overdrive will look like this:

    [​IMG]

    or this:

    [​IMG]
     
    Last edited: Oct 24, 2008
  9. Oct 24, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    You need an adapter and a new longer input gear (input shaft). The longer input gear will only work with the T-90A1 transmission, and a '66 CJ-5 with a factory F134 should have the T-90C. To adapt the T-90C, you need to change the cluster gear in addition to the input gear. Novak covers this thoroughly: http://www.novak-adapt.com/knowledge/t90.htm and http://www.novak-adapt.com/catalog/kits_cx.htm

    Check the used market for an adapter, or a T-90 that's already been adapted. That or a T-86 or T-14 and associated parts from a V6 CJ.
     
  10. Oct 24, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    Well... crap! I will try to make the best of this. If I indeed have an OD transmission then I just shot myself in the foot. Novak suggests that the adaptation can be done on a T-90C, but they don't really emphasize it. Beside the cluster gear Novak says it will raise the first and second gear ratios to 3.44 and 2.98.
    What does this mean exactly??
    Does it mean I will lose low-end torque?
    Would it be hard to start from a dead stop?
    Would OD be beneficial at all in this case?
    Novak suggests a SM420, among other things. I have seen threads for these trannies for sale. What is there rep?

    OzFin and EricM... thanks for your input. I will follow your suggestions for prepping the engine, and I will see about getting some pictures posted.

    Thanks ALL
     
  11. Oct 25, 2008
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
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    T90 a came with the 5.38 gears.
    t90 c came with 4.27 gears.

    Correct me if I'm wrong.

    Don't think it mattered as much on the year as it did on the gear ratio's of the axle. First gear in t90c was lower so you had an almost identicle first gear final ratio as one with with a t90a and 5.38's.
     
  12. Oct 28, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    I'm sorry to say that I don't really understand all this. As in differentials (axles) the lower numeric value, the higher the gear... right? So the lower ratio in a transmission will cause more "strain" on a clutch? Apart from a small lift, the Dauntless, and some headers, this Jeep will remain stock. It will not get offroad use, at least hardly ever, and then it would be light. Should I adapt the T90C w/OD to the Dauntless, or should I pull it and get something more compatable?

    I'll pick up the Dauntless today and place it on a stand and squirt it full of MMO. But all of these questions are for the future plan of this Jeep, to help with the direction I want to take.

    Thanks
     
  13. Oct 28, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    I don't know - could be - I was reading the Novak site. http://www.novak-adapt.com/knowledge/t90.htm They don't make a distinction based on the axle ratio, but instead by the year.
     
    Last edited: Oct 28, 2008
  14. Oct 28, 2008
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    I'd say your first task is to establish whether you have the T-90A1 or T-90C. If there's a tag on the top of the transmission, it will list the transmission type, or else someone here can decode the Jeep PN for you (Jim!?). If no tag, you'll need to count the teeth on the input gear - 16 teeth = T90C, 18 teeth=T90A1.
     
  15. Oct 28, 2008
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
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    The higher number in the axle--5.38 compared to 4.27.
    You'll have a slower top speed with the 5.38's. You can go a little faster with the 4.27's. But you can walk beside the jeep with 5.38's when its idling8) Its how many times the wheel spins compared to the times the driveshaft spins.

    Your not going to worry too much about what kind of strain the trans puts on the clutch. First thing I'd be worrying about is which flavor of T90 you have. If you have the t90 A, you just need the longer input shaft. If you have a T90 C, then you need a new trans.
     
  16. Oct 28, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    I have been going by my Chilton's thus far... after reading the Novak site I can see where there could be differences with overlapping housing/model numbers.

    I miss the relationship b/transmission gearing and differential gearing. I understand about having a 5.38 in the rearend, but I took Novak's site to mean I had that in first gear, meaning the transmission. And that with the adapter for the T90C it would change to a 3.44... which would be a great hi-way gear if it was in the rearend.

    I also understand what you gentlemen are saying... find out for sure what I've got. I appreciate the direction.

    If I can get home early enough tomorrow I will get under it and find some hard evidence. I don't even know my diff ratios yet. I DID bring home the Dauntless today! So that much is a done deal... Yeah!

    Thanks very much.
     
  17. Oct 28, 2008
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
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    I got ya now...

    My manual is packed away, but here goes.
    In the t90, the first gears are different depending on if its a A or C version. I believe the splines or something are different on the input gears of the A and C.

    Basicly, the t90 A was used with the 5.38's had say a 3.44 first gear ratio in the trans. The t90C had a 4.20(guessing here) first gear ratio. The idea was to give it the same low end first gear overall ratio as the A and 5.38 gears, but had a higher top speed because of the 4.27 axles. 2nd and 3rd gears in the trans were the same ratio's. 3rd gear is still 1 to 1 so it won't change the overall top end speed by changing the first gear.

    I'll try to find my manual and I can find out for sure on the applications.


    To use the dauntless and t90, you need a longer input shaft that was used in a t90 used in the trucks. Might be something in the tech section and I know its been discussed here before. If you have the t90A the gears are all reusable, just need to swap the input shaft. If you have the t90C, you can still use it, you just need to use the same longer input shaft, AND the first gear from a t90A. So essentially you end up with a t90A with a long input shaft either way. One just takes a little more effort.

    That help explain things any better??
     
  18. Oct 28, 2008
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
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    I didnt read all the posts but i have a t-86 from behind a 67 v6 that im going to probrobly part out because some of the gears are trashed. I beleive the internals are mostly interchangeable not sure?
     
  19. Oct 28, 2008
    Kerrdog

    Kerrdog New Member

    north Florida
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    Here is a quote from Novak. I read it again and I think I was reading it wrong to begin with. BTW- what is a cluster gear?

    The T90C is found in 1963-1971 Jeeps. Installers should note that a conversion to this version of the T90 would require a new cluster gear. This adds ~$90 to the expense of the conversion and raises the 1st and 2nd gear ratios from 3.44 to 2.98. This may or may not be in the swappers best interest. However, contact us if you do want to go this route. A GM transmission like the SM420 or SM45 may be a better option in this case.

    If it turns out that I have to change transmissions, I think I will seek out the SM465. But thank you for thinking of me. :)
     
  20. Oct 29, 2008
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
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    I just read the numbers on the tranny and it is a t-90c. I dont know what made me think it was a t-86. But just so you know. :)
     
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