that's about the only advantage a gforce has over the tko. tko says it's a direct swap with the bellhousing. all parts for gforce build are 1920 (with the cheapest of the two mainshafts and retaining stock casing), bellhousing and tko together are about that, and im sure they come with a warranty. it's 2k to send your tranny to gforce and have them build it, without upgraded shafts, and i dunno how they stand behind their product.