B&M 20480 NITROUS HOLESHOT 2400 - Manual (Page 2)

pan. If you do not have a drain plug in
your tranmission oil pan, you should
consider installing a B&M Drain Plug
Kit, P/N 80250, while transmission is
out of vehicle. If your transmission
does not have a drain plug or a dipstick
tube in the oil pan, loosen the oil pan
bolts to allow the fluid to drain. After the
fluid has drained, snug the oil pan back
into place. You may wish to service
your transmission while changing the
converter.
STEP 2. Remove driveshaft. Be care-
ful not to damage the smooth bushing
diameter on slip yoke models. Do not
let the cups fall off the U-joint crosses.
You may lose some of the needle
bearings if the cups fall on the ground.
It is a good idea to tape the cups to the
U-joint cross, so they won’t fall off.
Now is a good time to clean and in-
spect your U-joints. 4 Wheel Drive
models: Remove front drive shaft also.
STEP 3. Disconnect vacuum line to
vacuum modulator.
Powerglide: Disconnect throttle
pressure lever at transmission (See
Fig. 1).
TH-350: Disconnect kickdown cable
at carburetor. Remove retaining bolt
from kickdown cable at transmission.
Pull cable out of transmission and
disconnect cable from detent wire
link (see Fig. 2). Allow cable to hang
free.
TH-400: Disconnect kickdown wire
from electrical connector on left side
of transmission (see Fig. 3). Allow
wire to hang free.
STEP 4. Disconnect shifter:
Column Shift Models: Remove cot-
ter key or clip and disconnect rod or
bellcrank from shift lever on transmis-
sion (see Fig. 4). Allow linkage to
hang free.
Console Shift Models: Remove cot-
ter key or clip and disconnect shifter
rod or cable from shift lever on trans-
mission (see Fig. 5). Allow rod or
cable to hang free. Cable shift units,
remove two bolts holding cable cracket
to pan and let cable andbracket hang
free.
4 Wheel Drive models: Remove
knob from transfer case shift lever.
STEP 5. Loosen and disconnect speed-
ometer cable and pull cable out
ofspeedometer housing. Let the cable
hang free.
STEP 6. Disconnect oil cooler lines.
Use a fitting wrench, if available, to avoid
damage to compression nuts. We
recommend that the oil cooler lines be
flushed out to remove any foreign par-
ticles trapped in the cooler. Cooler lines
should be flushed in both directions with
solvent and air pressure. Aftermarket
coolers should be relaced if they are
contaminated due to torque converter
failure.
STEP 7. Remove dipstick and tube
assembly. Remove torque converter ,
cover pan bolts and remove converter
cover pan (see Fig. 6). Remove flexplate
to converter bolts (see Fig. 7). Use
starter motor to “bump” each bolt into
position.
STEP 8. Remove distributor cap to
prevent damage during transmission
removal. Support the transmission with
a jack. Remove transmission mount
bolts. Raise the transmission slightly
and remove the cross member. Be
sure the transmission jack supports
the transmission on a wide area so you
don't crush the transmission pan.
STEP 9. Remove the bellhousing bolts.
Lower transmission until the engine is
supported. Pull transmission back
slightly away from engine. Make sure
converter stays with transmission.
Lower transmission/converter assem-
bly and remove from vehicle. Caution:
4 Wheel Drive Vehicles: Transmis-
sion/converter transfer case assembly
is heavy. Exercise care during re-
moval if your transfer case bolts to the
transmission.
STEP 10. Pull converter off the front of
the transmission. Some oil will leak
out at this time. If you planto store your
original torque converter, drain it and
cover the neck to prevent entry of dirt.
STEP 11. Inspect your engine block
and engine plate. Make sure there are
no burrs that will prevent the transmis-
sion from bolting down flat against the
engine. File off any burrs that may be
present. Dowel pins should stick out of
the engine block a minimum of 1/2" for
proper alignment (see Fig. 8). Insuffi-
cient dowel pin engagement can cause
front seal and/or bushing failure due to
improper engine/transmission align-
ment. Bellhousing bolts alone will
not align the transmission properly.
STEP 12. Inspect your flexplate. Check
for distortion, excessive warpage or
Kickdown lever
Column Shift
lever
Figure 1
Figure 2
Console Shift
lever
Neutral saftey
switch harness
Kickdown
lever
Dowel pins must
stick out 1/2" for
proper transmis-
sion engagement
Figure 3