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REMOVING AND REINSTALLING AN AOD
Submitted
by macx / 02-11-05
I don't feel it's necessary to bag and tag all the bolts - that's
kind of
"over the top" for as few as there are, and they're all different
and only fit one thing.
- There are 6 bolts in the bellhousing,
5/8" wrench or socket.
- 40 to 50 lb-ft to reinstall.
- There are 4 torque converter nuts,
self locking, 9/16".
- Use a 15/16" socket on the
damper bolt to rotate the engine
to get at the converter nuts. Best
to rotate only clockwise so you don't
loosen the damper bolt. Position
each converter nut just below the
block on the driver side to access
after you remove the converter shield
at the bottom of the bellhousing.
You can then get an end wrench or
1/4" drive socket & an extension
on them. You can get a 3/8 drive
socket on them to reinstall & torque
if you position the nut just right.
25 to 30 lb-ft with Loctite to reassemble.
- There are 2 starter bolts, ½".
- There is 1 starter wire bolt, 3/8".
- There are 2 converter shield bolts,
15mm or 9/16".
- There are 2 long outer trans crossmember
bolts, ½" bolt head, 15mm nuts.
- There are 2 trans mount bolts, 16
mm.
- There are 4 driveshaft to rear end
bolts, 12 point 12mm.
- The throttle valve cable is a clip
on socket to a small ball end on the
arm on the trans.
- The shifter cable is held on with
a nut with an attached washer I believe
it's 9/16".
- The pan takes 10mm, is 90 inch lbs
or 7 to 8 ft lbs with Loctite (clean
the bolts and the bolt holes with carb
spray, blow dry with comp air if you
have it, or air dry, to make sure the
Loctite sticks. NO more leaks or seeps!)
- The filter is 8 mm, 100 inch lbs +/-
15, or about 8 ft lbs.
You need a MINIMUM of 15" clearance
to get the trans out from under the car.
- The center of gravity of the trans is just
forward of the center of the pan. My floor
jack has a socket (like an open end of a pipe)
that the head fits in. I welded a flat
plate about 8" square
to a short piece of pipe that fits into
the socket. The trans will balance on that
as long as it's reasonably well centered.
If possible, somehow firmly attach a piece
of plate to the top of your floor jack. That
will hold the trans without tipping, or use
2 floor jacks, one under the end of the tailshaft,
and another under the front of the oil pan
OR use a stack of blocks under the oil pan
that you can take out 1 layer at a time to
lower the trans. To get the trans up off the
ground when reinstalling, I use a bar over
a block to lift one end at a time and put
one layer of blocking under there at a time.
Keep working up till you can get your
jack(s) under. You do NOT want to try to hold
the trans up by hand, even with 2 strong people!!!
Stuff a rag tightly in around the tailshaft
after you remove the driveshaft, or tightly
tie a plastic baggy or sack around the outside
of the tailshaft, or drain some of the fluid
out by removing and temporarily replacing
the pan.
- Put a jack under the end of the tailshaft and jack up just enough
to get the trans mount crossmember out, then let it down some, makes
it much easier to get at the two top bellhousing bolts, though it's
still difficult. Just be careful and watch the hoses, etc, between
the back of the engine and the firewall so you don't crush something.
Once you get the trans off of the engine, the engine will balance
by itself very nicely on the mounts without extra support.
- The driveshaft to rear end bolts can be VERY tight. Use a good
quality end wrench, or you can usually use a 3/8" drive socket
with a longer extension and a breaker. First time I had mine loose,
I had to use the end wrench and hit it pretty good with a 3lb hammer
to break them loose. Put the trans in park while you're loosening
or tightening those bolts. Put in neutral to rotate to get at the
rest of the bolts.
- To make removing and replacing the H pipe MUCH easier, go to the
TECH
section and look for an article called "Easy H Pipe Removal".
WELL worth it!! However you do it, take the nuts off of the collector
to H pipe connection, and off of the H pipe to exhaust pipe connections,
then lower the back end of the trans with the mount & hangers.
The pipes will separate at the back end of the H pipe and you
can slide the hangers out of their sockets on the mount. Lube the
hangers, and reverse that sequence to reinstall.
- To get at the top starter bolt, put several long extensions together
and run them over the top of the motor mount, with the ratchet in
front of the mount. You'll have to guide the socket onto the bolt
by feel by running your hand up alongside the starter. It's tight,
and tough to get aligned the first time till you get the feel of the
alignment and socket placement.
- The cooler line nuts on the right side are 1/2".
- To access the top 2 bellhousing bolts, use several long extensions
and a swivel by the socket, or swivel socket, and run them up along
each side of the trans from about the rear of the case. Use a good
light, and you can usually see to guide the socket onto the bolt.
If the swivel is loose, wrap it in tape so the socket stays fairly
straight.
- The 2 top bellhousing bolts go thru 2 small brackets holding the
tv cable and the speed sensor wires. Those bolts are the hardest to
get inserted thru the brackets and then started. Be PATIENT and try
different hand positions until you get it. A good light helps. The
middle pass side bolt has the dipstick bracket on it. Take that one
out and remove the dipstick before you work on the top bolt (stuff
a rag or plug into the dipstick hole), and put the top one in before
you put that one in when reinstalling.
- Unhook the speed sensor wire plug at the driver side front of the
tailshaft housing.
- When reinstalling the converter into the trans, there are 3 distinct
splines it has to fit over or into, you should feel each one
distinctly. Rotate while gently pushing till it slips over the hollow
stator support with the external splines, and over the splines on
the end of the inner lockup/direct input shaft. Then the backside
snout of the converter, which has 2 flat spots on the outside at
the end, has to fit thru the seal and into the pump gears. This
is the last step. You should feel a definite increase in resistance
to turning after you get that snout into the pump gears. Make sure
to push the converter far enough back into the bellhousing so the
studs on the front side of the converter miss the flex plate (are "behind" it)
when lifting the trans up into position.
- To reconnect the shifter cable in the correct position, place the
shifter in OD, toward the rear of the detent (away from neutral).
Make sure the shifter lever at the trans is also in the OD position.
You can count the clicks from either reverse or first to the OD position.
If you put it in this position before you unhook it, and scribe or
paint a mark around the nut before you take it loose, then you can
see EXACTLY the right position for reattaching the cable in the slotted
hole.
VERY well worth the couple dollars to install a trans drain plug if
you EVER plan on removing the pan, even just for changing trans fluid
and filter.
- macx
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