NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M100 Tow Tractor Manual No. 46052
DECEMBER 15, 2013
PAGE 161
CHAPTER 5 MAUFACTURER’S INFORMATION
GM 4L70 TRANSMISSION
© 2013 General Motors. All rights reserved
Transmission General Information
How to Use This Section
This section provides the following information:
General maintenance information on transmissions
Procedures for on-vehicle repairs of the 4L60x/4L70E transmission
When you diagnose any condition of the 4L60x/4L70E transmission, begin with a
Diagnostic Starting Point. This procedure indicates the proper path of diagnosing
the transmission by describing the basic checks. This procedure will then refer
you to the locations of s
pecific checks. After you have determined the cause of a
condition, refer to Repair Instructions for repair procedures.
Basic Knowledge
Caution: Do not, under any circumstances, attempt to diagnose a powertrain
condition without basic knowledge of this powertrain. If you perform diagnostic
procedures without this basic knowledge, you may incorrectly diagnose the
condition or damage the powertrain components.
You must be familiar with some basic electronics in order to use this section of
the service manual. You should also b
e able to use the following special tools:
A digital multimeter (DMM)
A circuit tester
Jumper wires or leads
A line pressure gauge set
Arrows and Symbols
This service manual uses various symbols in order to describe different service operations.
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