
SHOVELHEAD TRANSMISSION REFURBISH
Just so happens that as
soon as I finished my engine.....I spent an entire day
teaching a young guy how to refurbish his tranny. His
tranny was leaking like a sumbitch, and when I
volunteered to show him how to reseal it, I discovered
that he had major issues with his main drive gear
bushing...so I showed him how to completely remove and
gut his tranny a few weeks ago. The gears were in good
shape, but it was time for new bearings and a new
countershaft...so, after saving up his pennies he finally
got all of the parts he needed and we were good to go. I
took these pictures as it went back together, figuring
they may be of some use to anybody that's never been in
their tranny before:
Turns
out one of his bottom case studs was flopping around...so
I impressed him by installing a helicoil. It was a little
tricky because that specific boss in the case is angled
on the inside surface, to provide clearance...so I had to
cut down the insert "just right" to remain
consistent with that inner surface. I coated the insert
with some epoxy to keep it oil tight after it cured: Main
drive gear ready for new bushing: My
trusty little "Harbor Freight" press has paid
for itself in more ways than I can count!! Notice the
"special" tool I used to press in the bushing: I
happen to own a "like new" old orignal HD drive
gear bushing ream...and yes, I did oil the heck outta' it
before I actually reamed the bushing...this was just a
nice pose for the picture: Bushing
and new seal installed: Pressed
new bearings into the countershaft gear cluster: And
pressed new bushings into the ends of the mainshaft: Mainshaft
assembly started with first/second MS gear, bearing cup,
shiny new shielded ball bearing, lockwsher and
nut...ready to slide into the case: While
sliding the mainshaft assembly into the cases, ya' have
to slip on third MS gear along with a thrust washer and
retaining clip...getting the clip over the splines and in
place can be a little bit of a pain, but no big deal with
a nice pointy thingy to help: Mainshaft
and drive gear installed: Securing
the retaining plate (those old "hammer" impacts
do come in handy still!): Getting
ready to slide in the assembled countershaft gear cluster
with it's new shaft and bearings...notice I have already
"glued" the thrust washer into the case with a
dab of lube...makes it a little easier to slide the
countershaft in with the case upright: Countershaft
all installed...setting the lockwasher tab: Looking
good: Shift
forks installed and adjusted (yes, I know...the "top
hats" are missing...I don't put those on until just
before I set the lid on...don't want one to fall in while
I'm busy dicking around with something else!!): I
LOVE "Hylomar"...the world's BEST gasket
dressing!! Lid
going on: Installing
tranny mainseal with another "special" tool: Looking
even better! One
of the RARE areas I recommend a little bead of
silicone...along the main drive gear splines before the
sprocket gets set in place: Sprocket
goes on with the recess facing the tranny....FLAT SIDE
OUT! Impact
helps here: Don't
forget the lockwasher tab! Getting
kicker parts ready: First
the spring: Then
the sliding ratchet gear: Then
the kicker gear (keyed to the shaft and secured with a
nut/lockwasher): I
replaced his kicker cover bushings too...since these are
not some super "critical" engine or internal
engine part...I just use a quick ball hone to fit 'em to
the shaft, nice and simple and works fine: Kicker
shaft installed with kicker gear in cover with new
bushings and new seal: New
throwout bearing and thrust washers with oil
slinger...ready to go: Cover
installed: All
done...new studs, new bearings, new bushings, new
seals....all for less than $150 or so. |