B&M 20261 SHIFT IMPROVER KIT User Manual

Page 2

Figure 2

The 1987 and earlier TH-400 has no checkball in this location and
must use Shift Improver Kit #20260. If you have a checkball in this
location, this kit (#20261) is the correct one.

Transmission I.D.

Nameplate Location

000

88 QUA 0000

JULIAN DATE

Model Year

88=1988
89=1989
90=1990

Serial Number

A= TH-400/475

(3L80/3L80-HD)

Figure 1

Figure 3

Filter

Remove bolt to remove filter

ers for the TH-400 transmission. See
your B&M dealer for details of the
correct torque converter for your ve-
hicle.
ADJUSTABLE VACUUM MODULA-
TOR #20234 This replacement vacuum
modulator for the TH-400 has the added
feature of being adjustable. The adjust-
able feature allows you to tailor your
shift points within a range of 2-4 mph.

to eliminate air leakage.
TEMPERATURE GAUGE KIT #80212
Most transmission and converter fail-
ures can be traced directly to exces-
sive heat. The B&M transmission tem-
perature gage can save you a costly
repair bill by warning you ahead of time
of an overheated transmission. The
B&M temperature gage is extremely
accurate and dependable, it comes
with all necessary hardware and is
easy to install.
B&M SHIFTERS; B&M manufactures
a complete line of automatic transmis-
sion shifters ideally suited for use with
the TH-400. These shifters provide you
with positive transmission control as
well as stylish appearance for your
vehicles interior.
TH-400 KICKDOWN SWITCH #20297
When installing a TH-400 transmission
in a custom installation in place of a
TH-350 or a TH-700 this kit provides a
kickdown switch that will fit into the TH-
350 or TH-700 throttle cable bracket.

INTRODUCTION

Transmission components are pre-

cision fit, work slowly and do not force
any parts. Burrs and dirt are the num-
ber one enemies of an automatic trans-
mission. Cleanliness is very important,
so a clean work surface is necessary.

FILTER SERVICE KIT #20287 The
filter service kit replaces the stock
factory filter with aspecial filter that
uses a a much finer felt micronic ele-
ment which also has more total filter
area so that the finer filtering element
does not cut down on oil flow. This kit
includes a special heavy duty oil pickup
tube that is seated to the case with a
double O-ring seal and is spring loaded