Allison 1000 2000 Pump Body 29542798 Late 22T Gear Duramax LLY LBZ LMM Silverado

Allison 1000 2000 Pump Body 29542798 Late 22T Gear Duramax LLY LBZ LMM Silverado

Fits: Allison 1000/2000-series (LCT1000) transmissions using the updated low-tooth-count pump design. This 26T/22T architecture is the later production design and is the same gear architecture Allison's updated service pump uses; aftermarket catalogs list casting 29542798 as 2000-up fitment. Core applications: Chevrolet Silverado / GMC Sierra 2500HD, 3500/3500HD with 6.6L Duramax LLY (2004.5-2005 - NOTE: the 22-tooth pump phased in during the LLY era; Allison supersession notes put 31-tooth pumps in 2004-and-down applications and industry sources date the changeover to ~2005 production, so casting-check any 2004-2005 truck), LBZ (2006-2007), LMM (2007.5-2010), LML (2011-2016); also Allison-equipped 8.1L Vortec HD pickups and Chevy Kodiak / GMC TopKick medium-duty of the same era. Early 2001-2004 LB7-era units built with the 37T/31T pump can be updated to this design only when paired with the correct matching stator. NOT for 2020+ 10L1000.

Check before you buy:

• Do NOT mix pump generations: this 26T/22T gear set does not interchange with the early 37T/31T gears, and the body must run its matching stator (29542795-style) — a 29542798 body with an early stator/gears is a no-build.

• Condition: Used OEM part, cleaned and inspected
• Includes: Used Allison 1000/2000 charge pump BODY, casting 29542798, with the gerotor gear set installed (26-tooth outer gear 4.325 in OD, 22-tooth inner gear 0.870 in thick).
• Part numbers: 29542798 — check against your casting or tag
• Warranty: 30-day return or replace after delivery
• Shipping: UPS Ground from our Tennessee warehouse, ships in 2 business days
• SKU: G-ALSN1K-PM-U-01

Not sure it's your part? Call 931-264-5429 or email huskpartsmedia@gmail.com with your VIN or transmission tag and we'll confirm the same business day. Shops: ask about volume pricing.