Okay, the next dial indicator type that we're going to use is a c-clamp base dial indicator
this is a Snap-on GA3400 the vise grip mount dial indicator that I showed
you in another video was the GA3634. This dial indicator I don't use very often
but sometimes I have to use it because there's no place to put a vise grip style dial indicator
base without damaging a component and this has a c-clamp base which will not damage anything if
you treat it with care so let's open this up and see what we have inside we've got
the piece of foam in here that keeps everything from rattling around and holds the dial indicator
in place please keep that with the box don't put it in oil don't throw it away we have a C
clamp right here the C clamp base itself that we can clamp on to anything that we want and it has
a some threaded holes one on each side and one on the end that just like the magnetic base
dial indicator we have these rods that we can screw into either the end or the sides of the
dial indicator there's an extension rod there are two rods one of them can be an extension
for the other one so we can get it extra long reach if necessary and we can thread that into
the end or either side of this C clamp style dial indicator base alright now this dial indicator is
very precise very expensive little tool this one is also jeweled and this measures in one
thousandth of an inch increments 0.001 inches so rather than half of a thousandth of
an inch like the larger dial indicators I showed you in the other videos I have the magnetic base
and the vise grip style this one only measures in one thousandth of an inch increments it has a
plunger right here with a tip that's removable and we can change tips even put extensions on there
if we want to for taking measurements it also has a cap here on the top that if we unscrew
that cap set it off to the side there's a hole there where we can stick a special adapter this
adapter right here this is for sticking down into small holes and measuring some back-and-forth play
where let's say that this plunger and the dial indicator assembly itself is too big to stick
down in where you want to take a measurement you can screw in this small hole tool and to screw it
in you have to push down about halfway on this plunger because there's a notch that this small
bore or the small hole tool has to screw into and if you get it positioned just right then we
can thread this aluminum housing in all the way if it's not positioned right like right here as
you try to screw it in there'll be a gap right there you can see the gap so you have to push in
we'll go it around a little bit to where it can go all the way in so now this dial indicator has
really it has two plungers we've got the one on the back I'll push it right now and you can see
that the needle will move but we also have the one on the top here if I tilt that back it
makes the needle move also and it pulls in that plunger so it just connects to the plunger on
the inside and it's handy for reaching down into small holes where you need to take some sort of
a measurement so right here I have a front axle cut away from a Toyota Tundra and I've cutaway
this material right here just to show how the front differential works but normally of course
that would not be cut away but you would still need a way to reach in and measure the backlash
on these teeth, the way you do that is right here on the side of the differential is the oil drain
plug well believe it or not you're gonna have to take that oil drain plug out and insert this
style of a dial indicator to measure the backlash on this axle housing because you cannot get to it
any other way so you have to reach down through some sort of a hole like that with this style
of dial indicator to take that measurement now of course, this style of dial indicator has this
shaft here on the bottom it's a solid shaft that we could put in another style of dial indicator
base a vice-grip base a magnetic base but we've got the C clamp style base that it comes with
right here so let's get this set up just to take a measurement here let's say we're going to clamp
just right here on the upper edge of the differential housing so I've got it clamped
in place we can thread on one of the rods here you need to screw that in tight by hand don't
use any pliers or any other tools on it and then we've got a clamp and we've got a clamp right
here that is going to clamp on to it's going to clamp on to the threaded rod right here and then
it has a hole in it right there where our dial indicator plunger can come in and be tightened
tighten down so let me tighten that up you're just a little bit and so now we've got a clamp
an extension rod sometimes I'll use this clamp to tighten the extension rod just a little bit
and then the dial indicator itself and then of course, we would either position the little
hole tool down in a hole or position the plunger on the back of the dial indicator
over whatever it is we're going to take a measurement on in this case I don't have
clearance or room to take a measurement with the back of the dial indicator but I might
be able to take a measurement with the front of it, if I put an extension rod on right here
just like that put the clamp back on and we'll position our plunger right here
right up against the tooth oh I got to get the tip of the plunger right on the tooth as much of
a right angle as possible just like that okay so watching the dial indicator needle movement
and the whole extension laying on the side of one of the teeth of the ring gear let's see if we can
get a measurement let me load it first okay so I've got a load on it I'm going to zero the dial
indicator so we've pre-loaded the plunger we've zeroed it and now we'll pull the ring gear forward
and backward and we are going between zero and seven-thousandths of an inch each of the large
numbered marks are ten-thousandths of an inch so we're getting the same seven thousandths
of an inch measurement so we got the same seven thousands of an inch measurement with
this c-clamps style dial indicator with the whole small hole attachment as we did with
the magnetic base dial indicator and the vise grip style dial indicator so I've used three
different dial indicator mountings and dial indicators well two different dial indicators
to get the same reading so in my class if you are done taking this measurement but
you're going to take another measurement then take the dial indicator clamp off
and very carefully set lay the whole thing in the box with the plunger sticking up so
that we don't damage the plunger and set it set it off to the side until you're ready
to use the end if you're done using it for the day then please disassemble everything
put it back how you found it in the Box put the foam element over it and put it away.