GM NV3500 Getrag 290 5sp S10 3rd Design Transmission Cluster Shaft 1996-On 1.180" Outside Diameter Journals (ends) .25" Groove 290-8CR MG5, HM290 NV3500 Mainshaft for NV3500 GM 1991-93 1.180" ends, .25" Groove (short reverse) 34-28-23-15-14-37 Tooth Count NOTE: This shaft is no longer available, it is superseded by a shaft with the same tooth count 34-28-23-15-14-37 however it has a long reverse gear; Identify this transmission by its Aluminum case Rear load. Will work in the 3rd design with 0.9" input an output bearings and 1.180" ID Counter shaft bearings.