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Dana 20 or 205?

Discussion in 'The Garage' started by bryanrash, Nov 28, 2005.

  1. bryanrash

    bryanrash Registered Member

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    Which is better and why? (dana 20 or 205)
     
  2. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    205..... way stronger, Dana 20's went behind 70 hp f-head jeeps and the original small bronco, I think they did use them behind 289 V-8's but that is still in a way lighter rig than a full size chevy
     
  3. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    Why? Never seen a Dana 20 in a 1 ton truck.........
     
  4. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    Just to play devil's advocate.... Bob Chandler ran a Dana 20 in the original Bigfoot..... 79 Ford with a 460 :eek1:
     
  5. atho

    atho 1/2 ton status

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    another devil's advocate post here...early K/5 blazers, 69-74 or so, could have had the D20 behind either the 3 on the tree or the SM465, usually behind the 250 or 307. but they do exist.

    that being said, the 205 is better for a bigger rig with more power. the D20 would be more suitable to a smaller rig, and you can purchase low gear sets for it, unlike the 205 (yet).
     
  6. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Correction: Bob Chandlers Bigfoot was NOT a '79. It was a '75 with the '79 grille on it.

    As for BC running the Dana 20, I've noticed that before from the pictures and still can't figure why he ran that combo.
    I do know for fact, Ford ran the Dana 20's in their 4x4 F-series line back in the early 70's. I've even seen a '74 Highboy with the Dana 20 under it. I was amazed to see that case rather than the 205.

    Chandler did change over to the 205 later but don't know when.
     
  7. sweetk30

    sweetk30 professional hooker Premium Member

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    easy 205 is 10 times easyer to find and fnd parts for.
     
  8. 6.2puller

    6.2puller 1/2 ton status

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    The Dana 20 was available behind a 401 in an Jeep Cherokee in the 70s. It has a bit better low range stock and has 4:1 kits available. There are kits to upgrade the outputs to 32 spline from stock 10spline. The cases themselves tend to crack and their are companies making a "girdle" for them that bolts to the PTO cover.

    That is a lot of work to make a D20 compare to a 205 stock. The only thing you would have going for you after spending all that doe would be the 4:1 and you could probably have a doubler for less.

    My vote would be for a 205 unless you are building a light jeep or early bronco.

    As to the D20 under a Highboy, are you sure that wasn't a D21? They look like a D20 but are single speed basicaly just engaging the front axle. Those I have seen in Highboys. A D20 in a Highboy would be a first if I saw one.
     
  9. atho

    atho 1/2 ton status

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    It was probably a Dana 24. Divorced, cast iron gear drive, 1.86:1 low range, comparable in strength to the 205. Definitely not a D20. :D

    Some old Chevy/GMC napco conversions used the Dana 23, which was the pass side drop version of this case. The 24 is ford specific and is (duh) driver drop.

    I think that International used the D21 in some of their fullsize trucks in the early 70's, but I could be wrong on that.
     
  10. thatK30guy

    thatK30guy 1 ton status Premium Member

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    It could be what you described. I'm not real familiar with those "smaller" Dana t-cases. I just remember seeing that Dana under the Highboy and knowing it was NOT a 203 or 205.

    Now I did have a '76 F150 once and it had some kind of Dana t-case behind the 435 tranny. Certainly was not the 203 or 205 either. Just weird to see those cases used up to '76 as far as I've seen. :thinking:

    Another F100 I had was a '75 model with the 203 full-time unit in which I converted to part-time. Just another food for thought about the years and different configurations of t-cases in the Fords.
     
  11. 6.2puller

    6.2puller 1/2 ton status

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    The Dana 20 was never available behind the 435. The Early Bronco guys have to adapt for run a 435. It was available with a Dana 21 wich is close and some use that adaptor redrilled. My brother runs a 435/20 combo in his jeep but with 42" TSLs he is ready to here it pop at any time. He has a 205 waiting.
     
  12. 3 on the tree

    3 on the tree 1/2 ton status

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    I guess the one in my 70K5 is living on borrowed time. It only has 72K on it, so maybe it will live for awhile. :haha:
     
  13. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    I wonder if it lived for more than a week :eek1:
     
  14. Blazer1970

    Blazer1970 1/2 ton status

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    The Dana 20 is obviously a smaller case than the NP205, but it is a very strong design, and you do not hear about people breaking them.
     

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