The genuine Allison 29531089 thrust bearing is the early-design bearing for the T1 and T6 positions in the Allison 1000 5-speed transmission. It fits 2001-2005 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L LB7 or LLY Duramax. The T1 bearing sits at the input shaft and C1 clutch hub, and the T6 position uses the same bearing. Worn thrust bearings cause noise, extra endplay and clutch wear, so every bearing should be replaced during an overhaul. Allison used both an early and a late design in these positions, so measure your old bearings before ordering.
Key Features
- Genuine Allison part number 29531089
- Early-design bearing for the T1 and T6 positions
- Approximately 1 3/4 in overall diameter
- For the Allison 1000 5-speed
- Sold individually, order one per position
Benefits
Factory Allison bearings restore correct endplay and quiet operation, which protects the clutch packs and gear sets after a rebuild. If your bearings measure as the late design, use the Allison 1000 T1 & T6 Bearing, Late Design. For a complete rebuild, see our Allison 5 Speed Bearing Kit and the Allison 5 Speed Overhaul Kit.
Fitment
Fits 2001-2005 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD with the 6.6L LB7 or LLY Duramax diesel and the Allison 1000 5-speed transmission. Measure your existing T1 and T6 bearings to confirm early versus late design.
What's Included
- (1) Allison T1/T6 thrust bearing, early design, 29531089
