A/T - (4L30E) Delayed Gear Engagement

BULLETIN NUMBER:
SB96-05-L002

ISSUE DATE:
JULY 1996

GROUP:
TRANSMISSION

TROOPER (UX) AND RODEO (UC) 4L30-E AUTOMATIC TRANSMISSION
DELAYED GEAR ENGAGEMENT

AFFECTED VEHICLES

All Trooper (UX) and Rodeo (UC) models equipped with 4L30-E automatic transmission.

SERVICE INFORMATION

Some affected vehicles may experience a noticeable delay from the time that gear selection is made to the time that gear engagement occurs. This usually occurs after the vehicle has been parked for an extended period of time (e.g., overnight) and only on the initial gear engagement when shifting into drive or reverse. This delay may be caused by torque converter draindown.

This condition does not affect transmission operation, once the torque converter refills, and is not harmful to the transmission. However, if it is necessary to eliminate this condition, replace the scarf cut seal ring located on the first groove of the turbine shaft with a solid seal ring, using a Turbine Shaft Seal Kit (Part No. 8-96041-327-0), in accordance with the procedure in this Service Bulletin.

NOTE
A short delay (i.e., 3 seconds or less) is normal when first engaging drive or reverse after allowing the vehicle to sit overnight.

SERVICE PROCEDURE

DISASSEMBLY

Transmission Assembly
^ Disassemble in accordance with Section 7A of appropriate Workshop Manual, to allow access to turbine shaft seal rings.

REMOVAL

Scarf Cut Seal Ring





^ Remove scarf cut seal ring located in first groove of turbine shaft (Figure 1).

NOTE
The first groove is the groove closest to the torque converter.

INSTALLATION

Solid Seal Ring
^ Lubricate first groove of turbine shaft and solid seal ring (from Turbine Shaft Seat Kit) with petroleum jelly.

^ Slip solid seal ring over turbine shaft and position it onto first groove. Use light finger pressure.

IMPORTANT!
The solid seal ring is made of a silicone-based material. This material will stretch during installation, causing an increase in seal ring diameter. To ensure proper seal ring functioning the seal ring must be resized. Use the sizing tool contained in the Turbine Shaft Seal Kit (Part No. 8-96041-327-0) and the following two steps to resize the solid seal ring





^ Place Sizing tool over turbine shaft and push downward until tool contacts overrun clutch (Figure 2).

^ Wait five minutes, then remove and discard sizing tool.

REASSEMBLY

Transmission Assembly
^ Reassemble in accordance with Section 7A of appropriate Workshop Manual.

PARTS INFORMATION

Part Number Description Quantity Required

8-9641-327-0 Turbine Shaft Seal Kit 1
Solid Seal Ring
Sizing Tool
Installation Instructions

FLAT RATE MANUAL UPDATE INFORMATION





Use the appropriate new labor operation as shown.

Labor time includes 0.1 administrative time allowance.