Eclipse L4-1997cc 2.0L DOHC (1991)
Synchronizer Hub: All Technical Service Bulletins
M/T - Modified Synchronizer Increases Shift Feel Quality
NO.
TSB-91-22-013
DATE
July, 1991
MODEL
All 1991 M/T Equipped Models
Except Truck and Montero
SUBJECT:
MODIFICATION OF MANUAL TRANSAXLE SYNCHRONIZER COMPONENTS
PURPOSE
This Technical Service Bulletin explains a modification to the 1-2 synchronizer sleeve, 1-2 spring, and 3-4 spring for the 1991 vehicles equipped with a
manual transaxle. This modification does not apply to Trucks or Monteros.
DESCRIPTION
Figure 1. Modification of Synchronizer Components
To improve shift feel quality for vehicles equipped with a manual transaxle, the 1-2 synchronizer sleeve, 1-2 spring, and 3-4 spring have been slightly
modified; the inner groove of the sleeve was made narrower, and the inner diameter of both springs was reduced. Refer to Figure 1.
The modified parts have been installed on vehicles manufactured from November 11, 1990. When replacing synchronizer parts on vehicles which were
produced before 11/11/90, interchangeability is possible, as long as the new 1-2 synchronizer sleeve, hub, and spring are installed at the same time. The
3-4 spring may be replaced without replacing the 3-4 synchronizer hub and sleeve, since the 3-4 hub and sleeve have not been modified.
PARTS INFORMATION
Refer to the following charts when ordering the new parts. Order the new numbers only and replace all 1-2 synchronizer components at the same time.
The 3-4 synchronizer spring is replaced only on F5M33, W5M31, and W5M33 model transaxles. Use the following charts to determine correct part
numbers and applicable transaxles.
Transmission
1-2 Synchro.
1-2 Synchro.
Model
Spring
Hub and Sleeve
New #
Previous #
New #
Previous #
F5M21
MD742441
MD738050
MD742461
MD724633
F5M22
MD742441
MD738050
MD742461
MD724633
F5M33
MD742445
MD739065
MD742465
MD738868
W5M31
MD742445
MD739065
MD742462
MD724636
W5M33
MD742445
MD739065
MD742465
MD738868
F5M33
MD742445
MD739065
MD742473
MD741394
(3000GT)
Transmission
3-4 Synchro.
