Register now to get rid of these ads!

Technical 1937 Plymouth transmission options

Discussion in 'Traditional Hot Rods' started by carmak, Jan 28, 2014.

  1. carmak
    Joined: Aug 8, 2005
    Posts: 451


    This spring I will be getting a 37 Plymouth P3 2dr sedan from a good friend.

    It has a 52 ish Phymouth flathead 6 and the original 3 speed. The current 3 speed has a problem (I don't know what).

    What years will fit in the 37? Is there an overdrive that will bolt in?


    Riverside, Iowa
  2. bct
    Joined: Apr 4, 2005
    Posts: 3,105


    tons of years will work. as far as I know you can use a top loader tower on some of the side trans for floor shift. there is an overdrive and they are fairly reasonable. I sold one on ebay a few years ago for 3oo or so. there is an old guy who specializes in them and sell them rebuilt. do some surfing and you will find him
  3. bako48
    Joined: Apr 2, 2013
    Posts: 150


    if you check in on the p15 website theres a guy who did a tech on installing a ranger 5 speed into a 37 I think. pretty simple and readily available
  4. George Asche (sp?) does the overdrives.....& as also mentioned, check the p15d24 site.

  5. BuiltFerComfort
    Joined: Jan 24, 2007
    Posts: 1,620


    In the 30s a R7 overdrive was an option on higher end Mopars. After WW2 it was replaced with the R10 model. Both work with most Mopar flatheads and both are getting hard to find.
  6. gimpyshotrods
    Joined: May 20, 2009
    Posts: 20,185


    I'd look into retrofitting a modern 5-speed. I have seen kits for '38-up. Not sure what makes the '37 different.

    I managed to plant a SBC and a 700R4 in a '37 Plymouth, for a customer in Germany, keeping the stock floor and firewall. If there is room enough in there for all that, there is room enough for a modern 5-speed.

Share This Page

Register now to get rid of these ads!


Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.