B&M 20260 SHIFT IMPROVER KIT User Manual

Page 2

Figure 2

Figure 3 - 1965-67

Figure 4 - 1968-87

The 1988 and later TH-400 has a checkball in this location and must
use Shift Improver Kit (#20261). If you have no checkball in this
location, this kit (#20260) is the correct one.

Transmission I.D.

Nameplate Location

000

80 QUA 0000

JULIAN DATE

Model Year

80=1980
83=1983
86=1986

Serial Number

A= TH-400/475

(3L80/3L80-HD)

Filter

#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.
FILTER SERVICE KIT #20287 The fil-
ter service kit replaces the stock fac-
tory filter with a special filter that uses
a much finer felt micronic element 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 to elimi-
nate 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 accu-
rate 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

The B&M TH-400 Shift Improver

Kit can be installed in a few hours by
carefully following the instructions.
Transmission components are preci-
sion fit, work slowly and do not force
any parts. Burrs and dirt are the number
one enemies of an automatic transmis-
sion. Cleanliness is very important, so
a clean work surface from which oil can
easily be removed is necessary.

This kit contains all the parts nec-

essary to obtain two different levels of

Figure 1

Filter, 1965-67 models

Vacuum modulator

Remove bolt to remove filter