Drivetrain - NVG Transfer Case Silicone Sealer Usage

Information IB05-05-S006

Excessive Use Of RTV Silicone Sealant On New Venture Gear (NVG) Transfer Cases

ISSUE DATE: April, 2005

Affected Vehicles
2003-2005 Isuzu Ascender (US/UT) with 4WD.

Service Information

Previously repaired transfer cases that were returned indicated an excessive use of RTV silicone on the case halves.

Important:
Excessive use of RTV silicone during field service assembly may result in bearing failure. DO NOT apply RTV silicone to both case halves during assembly. ONLY apply RTV silicone to the rear case half as indicated in the Service Manual. DO NOT apply a bead of silicone in EXCESS of 3 mm (1/8 in) to the rear case half.





Excessive use of RTV between the transfer case halves may cause the oil pickup screen to become plugged. This may result in a transfer case bearing failure due to lack of proper lubrication.

ONLY apply a 3 mm (1/8 in) bead of sealant, PIN 8-12345-739-0, or equivalent, onto the rear case half during assembly as shown above. Refer to the Service Manual for further information.

Failure to follow these sealant guidelines during assembly may result in repeat repairs, dissatisfied customers, and declined warranty claims.





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