This gear housing is a perfect fit for your Cummins diesel engine 6BT. It is a reliable and durable unit that will surely meet your needs. Made in China, this gear housing is of high quality and is an excellent addition to your truck parts and accessories. With the manufacturer part number 3960071, this gear housing is designed specifically for your engine type and can be used for various commercial truck applications. Don't miss this opportunity to improve your engine's performance and durability. Get this gear housing now and experience the difference it can make on your truck's overall performance.