Is your DeWalt DCD791 or DCD792 drill making weird noises, not spinning right, or just giving up? Might be time to replace the gearbox. This is a compatible replacement transmission assembly (fits part number N438742) that’s designed to get your drill working like new again. It comes with the chuck already integrated, which makes installation way easier—you basically swap the whole unit instead of fiddling with tiny gears.
It’s compatible with a bunch of DeWalt models, including DCD791B, DCD791D2, DCD792B, DCD792D2, and several other type variations (check the list in the description to be sure it matches your drill). The gearbox measures about 4.95 x 2.10 x 2.3 inches.
If you’re handy and comfortable taking apart your drill, this can save you a lot compared to buying a new tool or paying for professional repair. Just make sure your drill model matches exactly, and take your time during installation. A good option for DIYers, tradespeople, or anyone who wants to extend the life of their favorite DeWalt drill. Always unplug the battery before starting any repair!
