Buick Enclave: Description and Operation
TRANSFER CASE DESCRIPTION AND OPERATION
Fig. 46: Identifying Transfer Case
The transfer case in this vehicle consists of an aluminum housing with input helical gear, output driven helical gear, ring and pinion hypoid gear set and an intermediate drive shaft.
The transfer case transfers torque/power to the on-demand rear differential through a prop shaft assembly.
The on-demand rear differential distributes variable torque/power to the rear wheels through individual axle shafts.
Within the rear differential assembly is an active on-demand coupling system.
The on-demand system rear differential control module monitors wheel speed, vehicle speed, wheel slippage and other variables. The module directs the rear differential to distribute torque to the rear wheels as required.
Typical conditions when torque is applied are during vehicle launches, even without wheel slip and when there is front wheel slippage relative to the rear wheels. The amount of torque depends on the vehicle speed and the amount of wheel slippage.
NEW PRODUCT INFORMATION
The purpose of New Product Information is to document, important product changes which occur either model year-to-model year or interim model year.
Changes may include one or more of the following items:
- Specification changes
- New sealants and/or adhesives
- Disassembly and assembly procedure revisions
- Mechanical and diagnostic procedure revisions
- New special tools required
- Interim model year design changes
- A component comparison from the previous model year
TRANSFER CASE IDENTIFICATION
Identification Tag Marking
Fig. 47: Identification Tag Marking
SPECIAL TOOLS AND EQUIPMENT
SPECIAL TOOLS
DT-48074 Input and Output Shaft Seal Installer
DT-48075 Output Shaft Seal Installer
DT-48077 Output Shaft Slinger Installer
DT-48078 Inner Drive Shaft Seal Installer
DT-48094 Inner Drive Shaft Seal Protector
DT-48145 Press Support
J 5590 Pinion Bearing Race Installer - Rear
J 8092 Driver Handle
J-08614-A Pinion Flange Holder and Remover
DT-22912-B
J 22912-B
KM-307-B
Rear Pinion and Axle
Bearing Remover
EL-25070
J 25070
Heat Gun - 500-750
F
DT 26941
J 26941
KM-J 26941
Bushing and Bearing
Remover - 3-4
GE 28431-6
J 28431-6
Fluorescent Oil Dye
6 1-oz
GE 28428-E
J 4220
J 28428-E
High-Intensity Black
Light Kit
EN 29873
J 29873
Injector Nozzle
Socket 30 mm
CH 39570
J 39570
Chassis Ears
DT 45124
J 45124
Removal Bridge
