No announcement yet.

Distributer back lash

  • Filter
  • Time
  • Show
Clear All
new posts

  • Distributer back lash

    Could somebody explain why there is back lash in the distributer ? I would think the pieces would fit so that there is no back lash. Yes I know I am wrong but would like to explain it to me please.

  • #2
    Actually Bill, the backlash is not in the distributor. It originates at the gear on the oil pump drive and because it is a slotted rod that comes up to the bottom of the distributor, it wears. Also, that slotted shaft is also slotted on the other end going into the distributor. So, from the lash of gear drive to slotted shaft to slotted shaft to distributor is where all the lash is accumulated.
    You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!


    • Big hammer
      Big hammer commented
      Editing a comment
      The camshaft gear wears also! Not the timing gear but the driving gear for the oil pump drive gear
      Last edited by Big hammer; 07-22-2017, 02:41 PM.

  • #3
    The backlash is the accumulation on the amount of wear in the ends of the distributor shaft, oil pump gear and the intermediate distributor shaft. Camshaft gear teeth wear can also effect this lash, but may not be as detectable. I have timed many cars with the backlash measuring a 1/2" or more.

    Basically what Wiz Man said above
    3~ Tudor's & 1~ Coupe
    Henry Ford said,
    "It's all nuts and bolts"
    "Start by doing what's necessary; then do what's possible; and suddenly you are doing the impossible."

    Mitch's Auto Service ctr


    • #4
      Heard of a Guy that put SUPER ADHESIVE in the distributor drive shaft slots!!---"Wunder" how that went????
      Bill Andyouthinkiamgoofy??


      • #5
        Originally posted by Purdy
        Yo Bro, It probly woodn't go no whurs ... Yer brother Purdy .
        It would be like, "SET IT & FORGET IT"--He'd have to lurn how to overhaul his distributor, "IN PLACE"---He may as well have "glued" the distributor to the head!---LOL---Or glued on the HEADGASKET ON, with his SUPER ADHESIVE--
        Bill W.


        • #6
          Moderate backlash means nothing to the operation of the engine.


          • #7
            I suppose you don't want this... The distributor shaft was a little tight btw and it did not have the hole in the top of the shaft. Maybe that would have helped. Notice the slot in the old shaft, I wonder how that got in there. For you old timers, were the reproduction shafts like that, or was that an original shaft?
            You do not have permission to view this gallery.
            This gallery has 3 photos.


            • #8
              My upper bushing has stayed well oiled just by filling the oil tube as mentioned in the owner's manual. I rebuilt it about 1995 and it's still good and snug.


              Related Topics


              • Dennis
                Model A transmission ratios
                by Dennis
                Just thinking about something here and didn't put the math to it because I know there are others much better at it than I am. So ultimately my question is what percent is 2nd gear slower than 3rd?

                Here's what I was thinking, if you take a Model A transmission and turn it around, remove 1st and reverse sliding gear, and the reverse idler, and if it were possible to make a housing for...
                08-29-2018, 11:15 PM
              • carolinamudwalker
                Goldie locks preload for timing gear
                by carolinamudwalker
                OK, lets say you don't have the Goldie locks mesh when installing a new timing gear. What do you do about it? Buy another one and through the first one away? Lets say it is an expensive bronze gear. Inquiring minds want to know
                10-10-2020, 10:16 AM
              • Bill G
                Cam Shaft question Model A vs Model B
                by Bill G
                Other than the lobe for a fuel pump, are the A & B cam shafts the same and do they take the same timing gear? Is the timing of the lobes the same?

                When we recently tore into my engine to replace the timing gear we found that the engine apparently had a model B cam shaft with the fuel pump lobe. I have never had any timing issues with it, but I am wondering if the B cam shaft would...
                09-13-2020, 11:08 PM
              • ClaudeC
                pops out of 2nd gear
                by ClaudeC
                My 1933 model B ford pops out of gear in 2nd gear.
                06-28-2021, 11:17 AM
              • canadian
                cam gear.
                by canadian
                trying to sort out a engine noise . removed cover for timing gear , have a small amount of backlash movement but noticed that gear is a little loose seems around centre somewhere. fibre gear . question can this be replaced in car? I have a aluminum one on hand, are these recommended ? or worst ? also can cam gear come off on it own or does both gears have to come off at same time? thanks
                05-13-2019, 11:04 AM
              • Cape Codder
                What type of Timing Gear
                by Cape Codder
                I see there are aluminum timing gears offered by the vendors.
                1. Is / was there ever a brass one offered?
                2. Does changing to a metal timing gear make more noise than the fiber gear?
                3. If an aluminum gear is used how does it fair to meshing with a steel gear as to wear?
                4. Lastly, the instructions provided by the vendor description is to have at least .003" lash...
                12-18-2018, 12:25 PM
              • kris-k
                Aluminum timing gear going bad, advice needed
                by kris-k
                Hello, I noticed my timing gear is being shaved down by the drive gear. Anyone know why this is happening? I have a new fiber gear that I'm going to install but I'm wondering if this is part of a larger issue. I image a fiber gear would fail catastrophically if something isn't right. Thanks


                11-15-2021, 04:52 PM
              • BTERRY1
                Timing Gear Question
                by BTERRY1
                I have read somewhere that a cam gear with excessive backlash will "let you know it". I assume that means it will make noise. My question is, would this noise be present at all times, or would it be more prominent at idle vs. under load. My initial thought is that at idle, there is opportunity for a clatter, but under load I would think the gears would be under more direct contact with the...
                08-04-2022, 03:49 PM
              • DBaldwin
                Speedometer gear case
                by DBaldwin
                Doing my research I have a 4:11 rear gear however I cannot find a complete speedometer gear case that has the proper 21 tooth I see 18 and 19 tooth for the 3:56 and 3:78. This means I’ll have to buy a new complete case and then a new gear to put in it unless someone can point me to a source with a complete 21 tooth assembly. Hopefully someone can help me out on this one. This is for a 30-31 pickup....
                06-02-2021, 08:48 PM
              • BTERRY1
                Timing gear lash measurements
                by BTERRY1
                Taking a quick break from my transmission issues for those of you following.

                I am still a newbie and trying to learn as much as possible. I am trying to determine gear lash. I have read the red book and also understand to test in 4 equidistant places on the timing gear. Video link below. I rotate the gear so all the contact is on one side. Then move up in feeler gauges, till there is...
                05-24-2022, 08:53 PM