Jumpin' outa gear

Unknown
Unknown
edited November -1 in HUDSON
Hi, I'm sure this old problem has been covered umpteen times before but I can't see where, anyways here goes,-

Having spent a couple of years getting Ruth's 1935 Terraplane back together and ready to hit the road again after I don't know how long I get a call from my mechanic. Having put the gearbox back together from a box of bits, checking parts as he went along the gearbox jumps out of second gear with avengeance, can't even hold it in. So can some of you give me some help, areas to check, anything I can pass on to the mechanic will be great. I know it's a reconised problem which some of you must have experienced (maybe first hand). I've promised Ruth this car for 3yrs now and really want to see her in it this summer. Parts and info in the UK are few and far between and no I'm not in the Railton club and for my own reasons don't want to rejoin.

Please help me get Ruth behind the wheel (for the first time) of her Terraplane, her excitement is driving me nuts, and broke.

Comments

  • Jon B
    Jon B Administrator
    It's been a long time since I worked on a Hudson transmission, but I have a couple ideas:



    First, is the transmission interlock device hooked up (forces you to engage the clutch before shifting)?



    Second, your mainshaft intermediate gear thrust washer retainer may have slipped out of its groove or even broken. This is a large circlip that tucks in under the mainshaft intermediate gear and keeps it from sliding fore and aft. When the mechanic was re-assembling the transmission he would have slipped this on, and if it did not seat correctly, it could slip out of its groove.
  • Geoff
    Geoff Senior Contributor
    These are a special box that need special treatment, and the average mechanic won't be able to fix it. The second gear needs to have good white-metal in the shell, the correct thrust washers, and the end play and positioning of the input shaft exactly right for everything to work. The positioning is critical to get maximum mesh of the drive dogs, and there must be no taper on the teeth of the 2nd gear or the drive sleeve. The transmission locks are no good if the initial set-up is not correct. If there is a tendency to jump out of gear, the locks will only delay the inevitable. They are there to ensure the clutch is depressed, rather than hold the gears in mesh. You will need a workshop manual at the very least. As Jon says, the circlip must be in place, but I doubt if this would have come out. I have worked on dozens of these boxes, and the main problem I have is overcoming other peoples stuff-ups!

    Geoff.
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