A/T - Loss of Drive and/or Reverse
Bulletin 87-7440-2ADate Jan. '87
Ref. No 87-048A-7440
SUBJECT: LOSS OF DRIVE AND/OR REVERSE
MODELS AFFECTED: 1984-1987 THM 440-T4
NOTE: This bulletin is being reissued to correct the 1st paragraph spelling errors which can be confusing to the bulletin meaning.
BULLETIN COVERS:
Loss of drive and/or reverse on a 1984 to 1987 vehicle that has a THM 440-T4 transaxle with normal line pressures may be caused by the input sprag clutch assembly. This condition may be corrected by installing a new, wider input sprag clutch and related parts.
FIGURE 1 "A & B" - 440-T4 SRTA TRANSAXLE I.D. NAMEPLATE:
DATE OF CHANGE: (FIGURE 1)
April 1, 1986 (Julian Date 091), new input sprag clutch assembly used in later 1986 and all 1987 applications. This change is also on all Service Replacement Transmission Assembly (SRTA) models effective May 1, 1986 (Julian Date 121).
FIGURE 2:
SERVICE ACTION:
Remove and disassemble the transaxle. Check the input sprag (Figure 2).
SERVICE PARTS:
Part Number Description Parts Notes
Sprag Assembly (With These 4 parts will also be
8662031 End Bearings) available soon in a kit
8658889 Snap Rings (2) (Part No. 8646985) for
8658795 Outer Race servicing a transaxle with
8658834 Inner Race a Julian date at or after
those listed in "Date of Change" section above.
8658797 Spacer, Input Sun Gear When servicing a transaxle
8658796 Retainer, Input Sprag with a Julian date before
Clutch those listed above, all 7
parts will be needed.
8658800 Carrier Assembly, Input These 7 parts will also be
Complete available soon in a kit
(Part No. 8662906).
SERVICE MANUAL REFERENCE:
Refer to the THM 440-T4 Automatic Transaxle Unit Repair Table of Contents for input sprag clutch assembly service information.