THM 4L60-E – New Design 1-2 Accumulator Piston

CHANGE: Beginning on May 11, 1998 (Julian Date 131) all THM 4L60-E transmissions were built with a new design plastic 1-2 Accumulator Piston, and an ovate (oval) wire outer accumulator spring, to replace the previous design aluminum piston and round wire outer accumulator spring, as shown in Figure 1. Like to find obd code scanners for help?

REASON: More cost effective than the aluminum piston.

(1)1-2 ACCUMULATOR PISTON – Now manufactured out of plastic instead of the previous aluminum, which necessitated a dimensional change, as the plastic piston is thicker as shown in Figure 1.
(2)1-2 ACCUMULATOR OUTER SPRING – Now manufactured out of an ovate (oval) wire instead of the previous design round wire, to eliminate coil bind as shown in Figure 1.

The different 1-2 Accumulator Pistons and Outer Springs are not interchangeable. When replacing these parts you must remove the 1-2 Accumulator Assembly and inspect for the presence of either the aluminum or plastic 1-2 accumulator piston.
The plastic piston must use the ovate wire outer spring, and the aluminum piston must use the round wire outer spring to ensure against coil bind and spring breakage.
Refer to “Service Information” below for the proper service package part numbers if replacement is necessary.

1-2 Accum. Piston Service Package, 4L60, (1982-1993 Aluminum) …………………….. 24204495
1-2 Accum. Piston Service Package, 4L60-E, (1994-1997 Aluminum)………………….. 24204496
1-2 Accum. Piston Service Package, 4L60-E, (1998-1999 Plastic) ……………………….. 24214343
Note:  All service packages include the proper outer spring. Here recommend the car tool Launch Cresetter .

New Design 1-2 Accumulator Piston

Way to use the launch x431 cresetter

Cresetter or the launch x431 cresetter you can use the tool to diagnostic your car , so , how to use the launch x431 cresetter? If you want to use the launch x431 cresetter , you can do follow these ways, it can help you learn how to use the x431 cresetter well.

Here are the introduction ways:

First , find all the Launch Cresetter  Coverage ,only in this way , you can learn which brand car and you do and use .

Here are the x431 cresetter coverage:


Second, when you use the launch x431 cresetter , you should see all the images of  the cresetter pictures.

Launch Cresetter

Launch Cresetter


Third, you can see all the parameter of the launch x431 cresetter , and know the details of the x431 cresetter , here is it:

Fourth,If you want to learn how to use the launch x431 cresetter , you can see the video , the x431 cresetter vidoe , you can learn from this video :

More details about the launch x431 cresetter manual , see the pdf article :

All the four ways are both help you learn how to use the x431 cresetter tool , the details parameter of the tool:

a) Screen: 2.8” TFT 262K true color, 320*240 Pixels LCD display
b) Input voltage range: 8 ~ 32V
c) Operating current:<100mA@12V(Typical)
d) Power consumption: <1.2W(Typical)
e) Link connection: Standard OBD 16-pin DLC
f) Operating temperature: 0~ 50
g) Storage temperature: -20~ 70 @ RH 60%
h) Outline dimension: L * W * H = 121 * 82 * 26mm
i) Weight: <500g per set

How to use the Launch Cresetter

Launch Cresetter is a specialized automotive diagnostic tool for resetting the automotive service lights, which is developed on the 6th generation CReader hardware platform. This tool has applied the latest Cortex-M3 32- bit processor, 2.8″ color LCD display, which is smart, portable, and simple to use.

Launch Cresetter General Limitations. This is a license, not a transfer of title, to the
materials, and LAUNCH retains ownership of all copies of the
Materials. Customer acknowledges that the Materials contain trade
secrets of LAUNCH, its suppliers or licensors, including but not
limited to the specific internal designed structure of individual
programs and associated interface information. Accordingly, except
as otherwise expressly provided under this Agreement, Customer
shall have no right and Customer specifically agrees not to:
-Transfer, assign or sublicense its license rights to any other
person or entity, or use the Materials on unauthorized or
secondhand LAUNCH equipment, and Customer acknowledges that
any attempted transfer, assignment, sublicense or use shall be void;
-Make error corrections to or otherwise modify or adapt the
Materials or create derivative works based upon the Materials, or
permit third parties to do the same;
– Reverse engineer or decompile, decrypt, disassemble or
otherwise reduce the Materials to human-readable form, except to
the extent otherwise expressly permitted under applicable law
notwithstanding this restriction;
– Use or permit the Materials to be used to perform services for
third parties, whether on a service bureau or time sharing basis or
otherwise, without the express written authorization of LAUNCH;
– Disclose, provide, or otherwise make available trade secrets
contained within the Materials in any form to any third party without
the prior written consent of LAUNCH. Customer shall implement
reasonable security measures to protect such trade secrets.
To the extent required by law, and at Customer’s written request,
LAUNCH shall provide Customer with the interface information
needed to achieve interoperability between the Materials and
another independently created program, on payment of LAUNCH’s
applicable fee, if any. Customer shall observe strict obligations of
confidentiality with respect to such information and shall use such
information in compliance with any applicable terms and conditions
upon which LAUNCH makes such information available.

So how to make this tool connected ,Here are the steps which can help you

-Turn the ignition off.
-Locate the vehicle’s 16-pin Data Link Connector (DLC).
– Plug the OBDII cable into the vehicle’s DLC.
-Turn the ignition on.

Launch Cresetter Resetting operation tips:

Select “Select Brand” in function interface

press the up and down button and then press the enter button

fter communicating, “ Engine oil life current Value” appears the words:

Engine oil life values is some.

Press enter, input engine oil life value (0%-100%), as shown in

Press direction buttons to select 100 and then press enter to
exit, if reset successful, Figure 4-8 appears. Otherwise, another
indicating window will appear, please refer to the actual display.

Turn off the ignition switch

At this end you should know Launch Cresetter details :

LAUNCH electronic product is warranted against defects in materials
and workmanship for one year (12 months) from date of delivery to
the user.
This warranty does not cover any part that has been abused, altered,
used for a purpose other than for which it was intended, or used in a
manner inconsistent with instructions regarding use. The exclusive
remedy for any automotive meter found to be defective is repair or
replacement, and LAUNCH shall not be liable for any consequential
or incidental damages.
Final determination of defects shall be made by LAUNCH in
accordance with procedures established by LAUNCH. No agent,
employee, or representative of LAUNCH has any authority to bind
LAUNCH to any affirmation, representation, or warranty concerning
LAUNCH automotive meters, except as stated herein.