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TH350 Bushing Driver set question

Discussion in 'The Hokey Ass Message Board' started by Meyer, Aug 20, 2009.

  1. Meyer
    Joined: Sep 9, 2007
    Posts: 379

    Meyer
    Member

    I may make a run at rebuilding my TH350. I bought the Ron Sessions book, it lists the dimensions of the bushings on page 194 and shows a picture of a bushing kit in the tools section.

    Has anyone here made their own? Any words of wisdom? Materials? From other searches I have read of people using steel.

    Cut/Paste below from another forum, about a 5 year old post. I think you could combine alot of the tools into one. I own a machine shop so I am trying to save some dough :D

    BEGIN QUOTE

    I said I'd put up a drawing of the stepped bushing driver that I made, as I've had contact from a guy who wants to make one too.

    There are 12 bushes in total in this 'box, I laid them all out in a picture several posts further up. Since there are some duplications in size, there are actually only 9 different sizes to make bushing drivers for. In descending order of size, the bushes are:

    Direct Drum
    T/Converter Hub
    Input Ring Gear
    Rear Case
    Tailshaft
    Sun Gear and Rear Planet (x3)
    Pump Stator Rear (x2)

    Pump Stator Front
    Input Shaft to Output Shaft (plastic)

    The ones listed in red are the ones that I managed to combine the one single tool for.

    The plastic Input Shaft to Output Shaft bush just needs pushing in by hand, so that doesn't require a driver. The biggest and smallest of the metal bushes (Direct Drum and Pump Stator Front) are of such a size that I just couldn't include drivers for them on the stepped tool - the problem with the biggest one was that I just didn't have a piece of scrap bar at hand of sufficient OD!

    The issue with the smallest one was that it isn't very much smaller than the next size up, so if I'd added a driver for it at the far end of the stepped tool, the next biggest step wouldn't be big enough to give it a good positive driving surface. So I had to make seperate drivers for the biggest and smallest bushes. All the same I still managed to make a tool that conveniently works for 9 of the 11 metal bushes.

    If you can get hold of a bigger ID piece of steel to start with, there would be no reason why you could't put an extra step on the "big" end for the Direct Drum bush, and make the tool work for 10 of the 11. But putting a step on the small end for the smallest bush just isn't an option because of the reasons described above.

    One final thing to note is that for some of the bushes the driver is only any good for installing, not removing. It's just down to the dimensions of some of the steps. I probably could have made it slightly differently to have avoided this (and to tell the truth I kinda missed that problem when making it!) but the important thing is that it works for the install, where a decent driver's more important. Most if not all of the bushes can be removed by slide hammer or chisel anyway.


    A very useful option was to drill and tap a thread in the fat end of the driver to accept a long threaded bar. This is helpful when driving in the casing rear bushing, as you have to reach down a long way into the upturned case to get at it, and it can't be done from the back. I did try to do without this extension but its really hard to get a decent "whack" of the hammer down inside the case. And just resting some sort of extension on the driver is tricky too, it really is best if you can have something that screws directly in and that you can grab hold of to steady the driver.

    END QUOTE

    Thoughts?
     
  2. I bought a GM set on a auction works great
    with a lathe and a caliper it is not hard to make bushing drivers, have turned out a lot of stuff for caterpillars:eek:
     
  3. Meyer
    Joined: Sep 9, 2007
    Posts: 379

    Meyer
    Member

    I think I will take a shot at it. I have it drawn up, should be easy to make. :D
     
  4. squirrel
    Joined: Sep 23, 2004
    Posts: 59,221

    squirrel
    Member

    I bought a complete bushing driver set...after I'd done a dozen transmissions by taking the parts with bushings in them to a friendly local independent trans shop and paying them not much money to replace the bushings.

    A friend who ran an automotive machine shop for years used his cam bearing driving tool to replace trans bushings.
     

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