Upgrade your FOR GM FOR Chevy SM420 transmission with this comprehensive bearing and seal kit designed for serious rock crawling applications. This complete kit includes all the essential components needed for a thorough rebuild of your SM420 transmission.
Perfect for off-road enthusiasts and performance builders looking to maintain or restore their transmission's reliability and smooth operation. Each component is precision-manufactured to ensure proper fitment and long-lasting performance under demanding conditions.
Whether you're rebuilding a classic FOR Chevy or upgrading your rock crawler's drivetrain, this BK108 kit provides the quality parts necessary for a professional transmission overhaul. Suitable for both restoration projects and heavy-duty applications where reliability is paramount.
Bearings
Gaskets
Seals
Small Parts Kit
Snap Rings
Needle Bearings
'63–'67 – 194ci, 230ci, 283ci
'54–'61 – 261ci
'55–'59 – 288ci, 316ci, 336ci, 347ci
'60–'67 – 305ci, 351ci
'65–'67 – 194ci, 230ci, 250ci, 292ci, 283ci
'67 – 350ci