FOR SALE: 401/425 transmission adapter and new transmission

Discussion in ''Da Nailhead' started by cobravii, Aug 14, 2016.

  1. cobravii

    cobravii Well-Known Member

    Hi Guys,

    I've decided to go a different route with my car and have a remanufactured 700R4 with approx. 1/2 km driving distance, the adapter to mate it to a 64-66 401 or 425 with TV cable.

    I am asking $575 US for the adapter kit and $700 US for the transmission.

    everything is in new condition.
     

    Attached Files:

  2. Deadsled59

    Deadsled59 Well-Known Member

    Ill say in advance that I'm not inquiring about buying your transmission...

    BUT, Id like to know which route you're ultimately going as I am EYEballs deep in choices and paths I can take to finish my rebuild / custom.

    Im looking mainly at the 4L80e for strength, or 4L65e/4L70e using Russ Martins bell housing ( I like their lower gearing better)...

    Being that I like the gears in the 4L6Xe series better than the 4L80e, and TCI makes a gear-set that seems VERY close to the 4l6x series... Lower gears in a seemingly stronger transmission appears to make more sense.

    NOT meaning to hi-jack this thread, just looking for your input, or someone elses!
    Maybe you're opting for the 4L80e option!
    Good luck w your sale, sir!
     
  3. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    im using a 200-4r on mine for the better gearing than both. I considered a 6l80e but I just don't want to spend that kind of money. I wish this adapter would fit my block but I have a 62 engine and I know I need more parts than whats there.
     
  4. Deadsled59

    Deadsled59 Well-Known Member

    What kinda gearing are we talking?

    4L60e Gear Ratios:
    1st: 3.06,
    2nd: 1.62
    3rd: 1.00
    4th: 0.70


    4L80e Gear Ratios:
    1st: 2.48
    2nd: 1.48
    3rd: 1.00
    4th: .75


    4L80e with TCI Low Gearset:
    1st: 2.97
    2nd:1.57
    3rd: 1.00
    4th: .75


    The TCI gearset for the 4L80e is what I have my eyes on...

    I MAY just start a new thread...
     
    Last edited: Aug 17, 2016
  5. cobravii

    cobravii Well-Known Member

  6. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    1ST : 274
    2ND: 157
    3RD: 100
    4TH: 067

    more od and better spread plus no pcm and is the size of th350. built ones are very strong.
     
  7. BRUCE ROE

    BRUCE ROE Well-Known Member

    A note. Long ago I tried 2.75 and 3.0:1 low gear sets in my TH400. After substantial road miles
    (no racing) they caused failures; I no longer use them. The 4L80E uses the same ratios, and
    likely the same low gear sets (with similar failure modes). Bruce Roe
     
  8. cobravii

    cobravii Well-Known Member

    adapter kit and transmission are both sold
     
  9. John Codman

    John Codman Platinum Level Contributor

    If that was a Brendtsen's setup it is great, but I couldn't deal with the 10 lb steel crankshaft spacer. I had Rob Gerouix at Precision Billet Design make me a spacer out of a grade of Aluminum that he recommended. 3 lbs; money well spent. I hate unnecessary weight.
     
  10. cobravii

    cobravii Well-Known Member




    aaaannnnddd expensive to ship when reselling it ;-)

    now I'm waiting for my new bell housing to use a 4L60E :)
     

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