Allison Transmission 29540491 Front Bellhousing 2001-2007 LB7 LLY LBZ with Speed Sensor Boss
This is a genuine Allison OEM Bellhousing for the 01-07 LB7, LLY, & LBZ Duramax pickups. This housing has the speed sensor boss on the casting.
NOTE: If you have a 2001-2002, you need to also purchase: Transmission Cooler Line Adapter Fittings 88996640listed above. Utilizing these fittings will allow the use of this updated housing in your 2001-2002 truck.
NOTE: Convert Housings and fittings are 7/8 thread for cooler lines.