Thinking of going auto (Plenty of Questions)

Discussion in 'Drivetrain' started by 98snakehorse, Jul 27, 2016.

  1. 98snakehorse

    98snakehorse Well-Known Member

    Messages:
    1,710
    Likes Received:
    195
    Joined:
    Oct 24, 2011
    Location:
    Southeast, IA
    Alright, Im in the thought process of the possibility of going auto. Whats the best trans to go with for drag racing use and occasional street driving. Whats the most affordable way to go about this. I will probably end up selling my T45 thats in perfect working order, king cobra clutch, driveshaft, clutch adjustable cable and B&M shifter to help pay for the auto swap.
     
  2. lwarrior1016

    lwarrior1016 Moderator Staff SN95 Supporter

    Messages:
    5,640
    Likes Received:
    660
    Joined:
    Sep 22, 2014
    Location:
    South Mississippi
    4r75w will do everything you want it to. Youll need the auto harness and make sure the computer can have the auto functions enabled. A lot of guys run this trans in stock form with a good converter and it works out great.

    You could get a 4r70w, and itll still do what you want it to. Wichers123 just did an auto swap on his turbo 5.4L car.
     
  3. Dalamar

    Dalamar Legend Retired Staff SN95 Supporter

    Messages:
    13,863
    Likes Received:
    103
    Joined:
    Feb 3, 2006
    Location:
    SLC, UT
    you will also want a pedal assembly, if you just remove the clutch pedal the brake is too close to the gas....
     
  4. 98snakehorse

    98snakehorse Well-Known Member

    Messages:
    1,710
    Likes Received:
    195
    Joined:
    Oct 24, 2011
    Location:
    Southeast, IA
    Great, might be a dumb question but is there a suitable trans the doesnt require a ecu to run?
     
  5. Nighttrain

    Nighttrain Well-Known Member

    Messages:
    1,429
    Likes Received:
    5
    Joined:
    Jun 10, 2016
    Location:
    Atglen pennsylvania
    Yea you could go all hydraulic but might be more trouble than its worth.
     
  6. 98snakehorse

    98snakehorse Well-Known Member

    Messages:
    1,710
    Likes Received:
    195
    Joined:
    Oct 24, 2011
    Location:
    Southeast, IA
    Makes sense. Just wanting to know the least difficult way to make a auto drag friendly and compatible to my car. As in what all I would need to buy or alter.
     
  7. lwarrior1016

    lwarrior1016 Moderator Staff SN95 Supporter

    Messages:
    5,640
    Likes Received:
    660
    Joined:
    Sep 22, 2014
    Location:
    South Mississippi
    Honestly man, the 4r70 is easy to run. It plugs right in to your car, just need the tune. Or you could get a full manual valve body and wire up a lockup switch for the torque converter. [MENTION=18292]Wichers123[/MENTION] went this same route with his, maybe he'll chime in.
     
  8. Wichers123

    Wichers123 Well-Known Member

    Messages:
    1,203
    Likes Received:
    0
    Joined:
    Apr 21, 2013
    Location:
    Covington, louisiana
    Haha took me two tags to get me to chime in. 4r70w is a strong transmission I went full manual vb and I love it. The torque converter I recommend spending money on the billet option so you can lock 3rd (unless your n/a). I lock and OD with relays so the car is still daily drivable if wanted even though I don't. I used a stock rebuild kit from William (lwarrior) and used all the stock hard parts. I did put a hardened stub shaft to play it safe.
     
  9. Nighttrain

    Nighttrain Well-Known Member

    Messages:
    1,429
    Likes Received:
    5
    Joined:
    Jun 10, 2016
    Location:
    Atglen pennsylvania
    This is the way to go. Lockup switches are easy peasy, and the manual valve body is doing pretty much what i was getting at. All hydro except for ur torque lock