B&M 70226 TRANSKIT FOR GM 4L80E TRANSMISSION User Manual

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recommend B&M Trick Shift ATF.

SPECIAL INSTRUCTIONS

Choose a clean, dirt and dust free
place to work on your 4L80E. Dirt,
loose threads from rags and pieces of
old gaskets can become lodged in
valve bores and/or separator plate ori-
fices and cause the transmission to
malfunction. If you do not have a sol-
vent cleaning setup available, get sev-
eral cans of WD40® to clean your
parts.

Warning: Almost all cleaning solvents
pose a threat of fumes and or fire.
Make sure to use cleaning solvents
only in a well ventilated location away
from any source of ignition such as
open flames, sparks, hot water heat-
ers, etc.

Required Tools

Fine Cut

Flat File

Flat Screwdriver

Funnel

Gasket Scraper

Hammer

Indelible Marking

Pen

Small Retaining Ring

Pliers

Torque Wrench

Petroleum Jelly

Needle Nose

Pliers

Ratchet Wrench

Extension

2” & 8” 3/8”

Drill

T27 Torx Driver

Wrench

8mm & 10mm

Socket

8mm & 10mm

factory. We have designed this kit as
an easy way to overcome the less de-
sirable features of the factory cali-
brated imperceptible shifts. With this
kit you can set the shifting character-
istics of your 4L80E to one of two lev-
els of performance, Heavy Duty or
High Performance Street.

- Heavy Duty level produces a solid,
noticeably firm shift when compared
to the stock shift feel.
- High Performance Street level pro-
duces a slightly quicker and more ag-
gressive shift compared to Heavy Duty
level.

After installing the B&M Transpak Kit
the actual shift feel you get will de-
pend on the factory PCM calibration,
AutomaticTransmission Fluid (ATF)
temperature and the type of ATF you

have used. As ATF temperature in-
creases it becomes thinner (less vis-
cous) which allows the fluid to flow
faster through small orifices thereby
producing faster shift rates. In addition
to the effects of temperature, each
type of ATF (B&M Trick Shift ,
Dexron ® III, Type F, etc.) has a spe-
cific characteristic friction property.
This characteristic friction property is
one of the variables that determines
shift feel and clutch torque capacity.
Dexron® type ATF’s were formulated
to produce smooth imperceptible
shifts, while Type F or B&M Trick
Shift

ATF with their higher friction

properties results in firmer shift qual-
ity than Dexron ® lll type ATF. Both
DEXRON ® III and B&M Trick Shift
ATF’s are suitable for use in your
4L80E transmission. For maximum
performance and positive shift feel we