Th350 rear seal. I have replaced the rear seal twice myself (once when I first installed the trans and again about 3 years ago). 2. GM TH350/C Transmission Rear Extension Tail Housing Seal Up Kit This kit Includes: Metal Clad Ext Hsg Rear Seal, Ext Hsg Bushing, Ext Hsg to Case Rubber Oring, External Oring for steel bullet Hsg, Internal Metal Clad rubber seal for Bullet Hsg. Shop Now at the Guaranteed Lowest Price! Mar 2, 2023 · CT3994 - New front pump seal and extension housing seal for the TH350 transmission. Mar 21, 2019 · At this point I have a leak from the rear tailshaft housing seal. Also works on 1964-69 ST-300 transmissions. My question is, has anyone used ACDELCO part # 8654063 pictured below to solve a TH350 rear tailshaft housing seal leak? Mar 7, 2003 · Here's a couple more common TH350 leak spots besides the front and rear main seals and the pan gasket. If you replace the O-ring get everything good and dry (no oil) and put a little bead of RTV on the end of the tube and oring before you pop it back in. GM TH350 Transmission Super Seal Filter Kit. Only 5 left in stock - order soon. ehbwc 8yzssbb vqk 3v oaxrr e3q 2smh ibudgo7 ue3f 9rh0