Automatic to 360/4-speed conversion

Manual Transmission & Clutch Discussions

  1. ValiantK360

    ValiantK360 Well-Known Member

    Messages:
    190
    Likes Received:
    111
    Joined:
    Feb 25, 2016
    Location:
    Southeastern NC
    Local Time:
    3:09 PM
    Well, though I am far from this, I'm considering converting my automatic (column shifter) transmission to a 4-speed manual transmission when I drop my 360 into my '68 Valiant. I have never done this before, so it's new territory for me and it's just an idea that I'm considering, but have some questions about. I would like opinions on this too.

    Okay for the questions part:

    How much fabricating do I need to do into order to swap an auto trans to a manual trans?

    Are the transmission tunnels different for the auto to the manual?

    How much time and money would the conversion cost (the manual transmission itself, linkages, shifter, clutch, etc)?

    How would I be able to disable and possibly remove the column shifter from the steering wheel?

    Is it bad to "hack" apart the trans tunnel/floor to put the trans and shifter in?

    What are the difficult parts of doing this process?

    Overall I would probably need the step-by-step process for doing this. I see many people doing it for their cars and it would be pretty fun to drive. I love driving manual and want to turn my 4-door Valiant into a little performance valiant. :D

    Now, what do all you you FABO people think of this? Good idea? Bad idea? Should I just leave it auto, slap a 727 in there and call it a day? Honestly I just want to go as fast as I can from the 360 I'm building...I like the fact that the manual has an extra gear, which can help with performance and a bit of fuel economy. What would be the best bet to go fast? I mean like have great acceleration (building my 360 for low-mid end power/torque) which practically pins you to your seat? I know the gear ratios are a factor there and I'm aiming for a very high 2 to a low 3 rear-end gear. Sorry if this is a lot, I hope I got my point across. ANY HELP/ADVICE IS MUCH APPRECIATED!
     

    Attached Files:

  2. dodge71demon

    dodge71demon Well-Known Member

    Messages:
    3,433
    Likes Received:
    586
    Joined:
    Apr 29, 2009
    Location:
    Indiana
    Local Time:
    3:09 PM
    How much time and money would the conversion cost (the manual transmission itself, linkages, shifter, clutch, etc)? I think everything needed from Brewers is the $3200.00 range very very simple to do and yes toss the damn automatic as far as you can go 3:23 or 3:55 gears if you don't want to bang the 4 speed hard you can go with the 833OD
     
  3. dodge71demon

    dodge71demon Well-Known Member

    Messages:
    3,433
    Likes Received:
    586
    Joined:
    Apr 29, 2009
    Location:
    Indiana
    Local Time:
    3:09 PM
    How would I be able to disable and possibly remove the column shifter from the steering wheel? I think someone had a posting on here someplace about getting rid of the automatic stuff on the column I've done this several times again very very easy to do
     
  4. dano

    dano Evil Handy Man

    Messages:
    4,354
    Likes Received:
    2211
    Joined:
    Aug 22, 2005
    Location:
    Gresham, Oregon
    Local Time:
    12:09 PM
    We converted my dads Coronet, much the same process. You will need:

    Transmission floor hump and front carpet that fits it
    Transmission with shifter with A-body tail
    Bell Housing and throw out arm
    Clutch kit
    Flywheel with correct balance
    pedals or at least the brake and clutch pedals
    Z-bar, lineages, ball pivots and spring
    Frame bracket (this weld too the frame on the inner fender to support the z bar
    Possibly a drive shaft or at least a yoke if your 904

    You can gut the column of the shiter suff but you will need to take it apart or find a floor shift column.
     
  5. ValiantK360

    ValiantK360 Well-Known Member

    Messages:
    190
    Likes Received:
    111
    Joined:
    Feb 25, 2016
    Location:
    Southeastern NC
    Local Time:
    3:09 PM
    Alright perfect! I will have to do a little research on those things for sure. :)
     
  6. 67Dart273

    67Dart273 FABO Gold Member FABO Gold Member

    Messages:
    54,684
    Likes Received:
    24625
    Joined:
    Oct 14, 2010
    Location:
    Idaho
    Local Time:
    12:09 PM
    Make sure you get a bell that will fit the car. There was probably far more "sticks" in pu and those won't work.
     
  7. Sedanman

    Sedanman 67-9 Valiant specialist

    Messages:
    8,508
    Likes Received:
    615
    Joined:
    Apr 3, 2009
    Location:
    chicago Il
    Local Time:
    2:09 PM
    It gets expensive real quick.
     
  8. Woods74

    Woods74 Broke Senior

    Messages:
    6,001
    Likes Received:
    245
    Joined:
    Aug 21, 2010
    Location:
    Seattle, WA
    Local Time:
    12:09 PM
    ^yup, tons of time to collect parts too. I got a Pro-matic shifted automatic and am happy as a clam!
     
  9. ValiantK360

    ValiantK360 Well-Known Member

    Messages:
    190
    Likes Received:
    111
    Joined:
    Feb 25, 2016
    Location:
    Southeastern NC
    Local Time:
    3:09 PM
    Yeah... I think I will keep the automatic and just go with a nice 727. I did not realize it was so much money and work to do this. I guess it's better to just have an original 4-speed car. :banghead:

    At least with automatic transmissions it's easier to drive in heavy traffic. After all, I live very close to Chicago, IL. :D
     
  10. Sedanman

    Sedanman 67-9 Valiant specialist

    Messages:
    8,508
    Likes Received:
    615
    Joined:
    Apr 3, 2009
    Location:
    chicago Il
    Local Time:
    2:09 PM
    I have a 727 core I'll sell ya and it's sitting by the back of your car ;)
     
  11. ValiantK360

    ValiantK360 Well-Known Member

    Messages:
    190
    Likes Received:
    111
    Joined:
    Feb 25, 2016
    Location:
    Southeastern NC
    Local Time:
    3:09 PM
    Actually, I have a 727 sitting in the wood room at my house. Thanks though! :D
     
  12. j par

    j par Well-hung Member

    Messages:
    29,915
    Likes Received:
    17742
    Joined:
    Jul 2, 2014
    Location:
    Portland Oregon
    Local Time:
    12:09 PM
    #1 almost none
    #2 yes
    #3 lots
    #4 with wrenches
    #5 yes , don't hack! Precision cut!
    #6 see #3
    %100 promise you'll make up the whole new set of curse words but also with that promise there is the promise you'll never regret it! :burnout:
     
  13. SpeedThrills

    SpeedThrills FABO Gold Member FABO Gold Member

    Messages:
    2,032
    Likes Received:
    754
    Joined:
    Jun 3, 2008
    Location:
    Very South Jersey
    Local Time:
    3:09 PM
    If you want it to be "as fast as possible", I'd consider using a 904, if you go auto. Much less parasitic drag. Lots of race cars use them.

    If you go stick, be careful when it comes to the flywheel, and more specifically, it's balance. I'm not sure if the 360 ever came with a stick. I think 360's were all externally balanced, and engine's that came with sticks were internally balanced. So, if using stock parts, you could end up with a bad vibration.
    Maybe your 360 has been internally balanced, and maybe someone sells a flywheel that is for an externally balanced 360 if it isn't.
    It's been a long time since I've considered what you're doing, so maybe someone could chime in to fill us in.
     
  14. ir3333

    ir3333 Well-Known Member

    Messages:
    5,317
    Likes Received:
    1774
    Joined:
    Jun 1, 2008
    Location:
    ontario,canada
    Local Time:
    2:09 PM
    904 is about 35lbs. lighter too!
     
  15. j par

    j par Well-hung Member

    Messages:
    29,915
    Likes Received:
    17742
    Joined:
    Jul 2, 2014
    Location:
    Portland Oregon
    Local Time:
    12:09 PM
    Most aftermarket flywheels (like the 440 source one for about $150) have a bolt on weight for externally balanced and take it off for neutrally or internally balanced.:coffee2:
     
  16. SpeedThrills

    SpeedThrills FABO Gold Member FABO Gold Member

    Messages:
    2,032
    Likes Received:
    754
    Joined:
    Jun 3, 2008
    Location:
    Very South Jersey
    Local Time:
    3:09 PM
    Thanks, JP. I figured someone must sell one. It's been a long time. lol
     
  17. yellow rose

    yellow rose Overnight Sensation

    Messages:
    28,501
    Likes Received:
    25217
    Joined:
    Jun 19, 2015
    Location:
    Central Washington
    Local Time:
    12:09 PM


    FWIW the 360 did come in front of a manual trans.
     
  18. 19DART66

    19DART66 Well-Known Member

    Messages:
    335
    Likes Received:
    176
    Joined:
    Nov 19, 2008
    Location:
    Ballston Lake NY
    Local Time:
    2:09 PM
    The flywheel from 440 source comes with one weight that has to be cut down to proper weight and rebalanced to work with a 440,400,340,or 360 external balance engines. all four engines have different balance weights, and the 440 has 2, 1 for 6pack rods and 1 for cast crank.
     
  19. SpeedThrills

    SpeedThrills FABO Gold Member FABO Gold Member

    Messages:
    2,032
    Likes Received:
    754
    Joined:
    Jun 3, 2008
    Location:
    Very South Jersey
    Local Time:
    3:09 PM
    Thanks for info, folks. Maybe ValiantK360 will reconsider the stick shift option.
    I have a 360 and 727 (was part of a package deal) for my 74 Dart Sport. If I don't bracket race it, I want to put a 4 spd in it for the street. The car has a clutch pedal; that's all I have now, for the swap, lol.
    Sorry for the hijack...
     
  20. j par

    j par Well-hung Member

    Messages:
    29,915
    Likes Received:
    17742
    Joined:
    Jul 2, 2014
    Location:
    Portland Oregon
    Local Time:
    12:09 PM
    why wouldn't you bracket race with a 4 speed ?
     
  21. yellow rose

    yellow rose Overnight Sensation

    Messages:
    28,501
    Likes Received:
    25217
    Joined:
    Jun 19, 2015
    Location:
    Central Washington
    Local Time:
    12:09 PM


    Now you're just stirring the pot right there!!!!!!!!
     
  22. barbee6043

    barbee6043 barbee 6043 FABO Gold Member

    Messages:
    16,774
    Likes Received:
    10378
    Joined:
    Jul 20, 2008
    Location:
    Shepherd, Texas ( SE Tx)
    Local Time:
    2:09 PM
    people that have 4 speeds generally love em. I do. the bad part is its hard for people to piece them together now days. . hard to find an original parts car for your applicarion, too, which is best way to get there.

    Brewers can furnish the while thing or help you with missing parts/pieces.

    yep any way you look at it, takes money and work from you or someone. whats new there!?????

    the column? I have cut off shifter handle, a little fiberglass and body filler, you could not tell/
     
  23. dano

    dano Evil Handy Man

    Messages:
    4,354
    Likes Received:
    2211
    Joined:
    Aug 22, 2005
    Location:
    Gresham, Oregon
    Local Time:
    12:09 PM
    McLeod sells weights too. I have their flywheel, its a nice piece.
     
  1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.