LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2021 >> Jetta GLI S, Standard Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Controls, Housing (02Q, 0BB) >> 34 Controls, Housing >> Front Axle Differential Lock >> Front Axle Differential Lock, Installing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Front Axle Differential Lock, Installing

NOTE:

Refer to "Front Axle Differential Lock, Removing" to get a list of the special tools needed. Refer to FRONT AXLE DIFFERENTIAL LOCK, REMOVING .

Replace self-locking bolts and nuts after removing them.

Replace the bolts that were tightened with an additional turn after removing them.

Install any cable ties that were loosened or cut off during removal at their same location.

Install in the reverse order of removal while noting the following:

-- Coat the splines on the manual transmission differential with Grease for Clutch Plate Shaft Splines.

-- Push the engine/transmission slightly toward the front (a second technician is needed).

-- Slide flange shaft front axle differential lock completely onto manual transmission. While doing this, join drive axle/bevel box splines centrally with the differential. If necessary, turn on the flange shaft.

-- With proper tooth position and central guiding, front axle differential lock slips up to stop against manual transmission.

NOTE:

Do not pull front axle differential lock with mounting bolts against manual transmission, otherwise front axle differential lock is canted and mounting eyelets can break off.

-- Install the lower bolts (-arrows-) that attach the front differential lock to the manual transmission and tighten to tightening specification -item 12- OVERVIEW - DIFFERENTIAL, AWD AND FWD WITH FRONT AXLE DIFFERENTIAL LOCK - List Item: Hex Bolt .

Fig 1: Identifying Front Axle Differential Lock Lower Bolts
GWWN34-12017Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the upper bolts (-arrows-) that attach the front differential lock to the manual transmission and tighten to tightening specification -item 12- OVERVIEW - DIFFERENTIAL, AWD AND FWD WITH FRONT AXLE DIFFERENTIAL LOCK - List Item: Hex Bolt .

Fig 2: Identifying Front Axle Differential Lock Upper Bolts
GWWN34-12018Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Tighten the flange shaft -item 13- OVERVIEW - DIFFERENTIAL, AWD AND FWD WITH FRONT AXLE DIFFERENTIAL LOCK - List Item: Bolt .

Fig 3: Identifying Right Flange Shaft Countersunk Bolt, Socket And Key T10107
GWWA34-0615Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
NOTE:

Threaded inserts (for example, "Heli Coil") are found in the pendulum support fastening holes on some transmissions. Refer to Figure.

Fig 4: Identifying Pendulum Support
GWWN34-10973Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the pendulum support with new bolts. Refer to OVERVIEW - ASSEMBLY MOUNTS .

-- Install the connector -arrow- on the Differential Locks Control Module -J647-.

Fig 5: Locating Axle Differential Lock Control Module Connector
GWWN34-12013Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the drive axle. Refer to DRIVE AXLE, REMOVING AND INSTALLING .

Fig 6: Identifying Right Drive Axle Heat Shield
GWWA34-10415Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- If removed, install the drive axle heat shield -arrows-. Refer to DRIVE AXLE HEAT SHIELD, REMOVING AND INSTALLING .

-- Check oil level in front axle differential lock. Refer to FRONT AXLE DIFFERENTIAL LOCK FLUID LEVEL, CHECKING .

-- Assemble the exhaust system. Refer to OVERVIEW - MUFFLER .

-- Install the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

scientia non olet · About LEMON Manuals