B&M 70233 TRANSKIT - Manual (Page 2)

2
steel plates (
EXCEPTION:
'87-'93
install 15 tooth steel first).
IMPORTANT:
Index the five (5)
wide slots on the steel plates with
the wide slots in the input housing.
The wide slots are clearance for
the 3-4 clutch boost springs (#106)
that will be installed after checking
the clutch pack clearance.
3. Install original 3-4 clutch backing
plate (#104) and thin (0.094 in.)
retaining ring (#105) supplied with
kit ('82-'86 only). The original back-
ing plate may be too thick in which
case you will have to use a thinner
backing plate. Install the 3-4 clutch
backing plate with chamfer side
up.
CLUTCH CLEARANCE CHECK
STEP 2
. 3-4 CLUTCH CLEARANCE
WARNING:
Do not omit this step,
optimum 3-4 clutch operation and
durability depends on proper clutch
pack end clearance setting.
1. Check the end clearance between
the 3-4 clutch backing plate (#104)
and the first composition faced
plate (#103) with a feeler gage.
Check the clearance all the way
around between the plates to in-
sure that the gap is uniform (plates
are parallel). If the gap is not uni-
form all around, recheck the instal-
lation of the individual 3-4 clutch
parts to determine cause.
2. Select the proper backing plate
(#104) thickness from the chart
(
Figure 2
) to obtain the correct
clutch clearance. You can use the
thick (0.125 in.) or thin (0.094") 3-
4 Backing plate retaining ring
(#105) in combination with selec-
tive backing plates for additional
clearance adjustment range ('82-
'86 models only).
IMPORTANT:
The 3-4 clutch pack
end clearance has a direct effect
on 2-3 shift feel. For high perform-
ance applications the best 2-3 shift
feel and 3-4 clutch pack life is
obtained when the 3-4 clutch clear-
ance is set as close to the low side
of the chart tolerance as possible.
CAUTION:
DO NOT set the 3-4
clutch pack end clearance below
the minimum dimension specified.
ADDITIONAL CLUTCH PLATE
If you need additional clutch ca-
pacity in the 3-4 clutch, it is possible
to add a seventh friction plate to the
clutch in many case. As normally
assembled, there is a steel plate be-
tween the 3-4 clutch apply plate and
the first friction plate. In many cases
the stack up of the clutch allows room
for an additional friction plate to be
installed between the apply plate and
the steel plate with the use of a thin
backing plate. The correct clutch
clearance must be maintained with
the extra plate.
3-4 CLUTCH FINAL ASSEMBLY
STEP 3.
Once the correct 3-4 clutch
clearance has been determined
the 3-4 clutch boost springs can be
installed.
1. Remove 3-4 clutch Retaining ring
(#105) and Backing plate (#104).
2. Install the five (5) 3-4 clutch boost
spring assemblies (#106) as shown
in (
Figure 2
). Install the boost
spring assemblies so the captured
end of the springs face the clutch
backing plate.
IMPORTANT
: The
3-4 clutch boost springs are de-
signed for use ONLY with the
(3.71") long 3-4 clutch apply ring.
The boost springs can be used in
five (5) friction plate clutch packs
BUT
you must install two (2) extra
steel plates in the clutch pack to
prevent the boost springs from be-
coming coil bound (solid) as the
clutch pack wears.
3. Install the 3-4 clutch backing plate
(#104) then compress 3-4 clutch
boost springs and install 3-4 clutch
retaining ring (#105).
BEFORE OPERATING VEHICLE
Once the transmission is installed in
the vehicle it is important to verify that
the transmission’s hydraulic system
is functioning properly to prevent pre-
mature component failure. At
B&M
,
every transmission we build is thor-
oughly tested on a commercial trans-
mission test stand to verify proper
operation and correct oil pressures.
We realize that a test machine is not
available to most people using this kit
however, we strongly recommend
checking for correct oil pressures.
Checking the oil pressures
BEFORE
driving the vehicle should be consid-
ered cheap insurance when com-
pared against the cost of rebuilding
the transmission a second time be-
cause a minor problem was not de-
tected. Oil pressure tap locations,
appropriate pressure charts and
trouble shooting guides are provided
in most service manuals. You will
need a 0-300 PSI gage to check the
pressures. Make sure the T.V. cable
is properly connected and adjusted
before checking oil pressures or op-
erating the vehicle.
DRAIN PLUG INSTALLATION
Locate mounting position inside pan
for B&M Drain Plug. Make sure to
avoid locating plug where it could
interfere with internal transmission
parts, i.e. valve body, filter, servo,
etc.
Drill 1/2" diameter hole in position
determined. Remove all burrs
around hole and clean pan to avoid
contamination of transmission fluid.
Install Drain Plug as shown in figure.
Tighten nut to 25 lb.ft. maximum.
Use wrench on bolt head to prevent
rotating entire assembly. (
Figure 5
)
PLATE TYPE THICKNESS QUANTITY
REQUIRED
FLAT STEEL 1.97mm (.078") 5
CLUTCH PLATE
COMPOSITION FACED 2.03mm (.079")
6
CLUTCH PLATE
Figure 1: 3-4 Clutch Information Chart.