Duramax ZF6 Manual Transmission Tailshaft Housing 2001-2006 Chevy & GMC

The ZF6 manual transmission found in early model GM HD trucks have always been prone to tail housing cracks. This new HD casting is a direct replacement for your OE housing and features material and structural improvements in the OE failure prone areas.

Features:

• Reinforced Webbing at OE Failure Areas
• Increased Material Thickness in Failure Areas
• Brand New Diecast Aluminum
• Precision Machined Sealing and Bearing Surfaces
• Optional Bearing Kit (Uninstalled)

Fitment:

2001-2006 Chevy & GMC 2500 & 3500 applications with the 6.6l LB7/LLY/LBZ Duramax or 8.1L with the ZF6 Manual Transmission

Installation instructions:

1. With the old housing removed (hint the large hex bolt, AKA shifter detent must be removed to pull the old housing off). Check that the inside of the new tail housing is clean. Especially the shifter slides and bearing surfaces.

2. Install bearings and shifter linear bearing (if applicable).

3. Install idler shaft & gear.

4. Lubricate the shifter slides and bearing surfaces with assembly lubricant.

5. Before bolting the new housing on, apply a light bead of silicone and follow the silicone manufacturers instructions. We prefer Permatex® The Right Stuff®. Reinstall the tail housing and torque the bolts to 30 ft-lbs or 360 in-lbs.

6. Install reverse light switch, shifter detent, exhaust hanger etc.

7. Final assembly of transfer case, driveshaft and fill transmission with oil.