Talk:General Motors transmissions
(→TH200, TH2004R transmissions) |
(→TH200, TH2004R transmissions) |
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===TH200, TH2004R transmissions=== | ===TH200, TH2004R transmissions=== | ||
| − | The TH200 was introduced during the 1976 model year - also the first GM transmission with metric fasteners. As with the TH350/400, its a 3 speed transmission, with 1979-87 production models using lockup torque converters. TH200s have a one-piece case design which resembles a Powerglide without a bolt on tailhousing. TH200s also lack a vacuum modulator where a throttle valve cable is used to control shift points (similar to the Chrysler Torqueflite, TH2004R, and THM700R4/4L60). Unlike the later GM overdrives, TH200s have a cast iron pump. TH200 (including the TH200C) have the following bellhousing patterns - Chevrolet V8/inline six/90 degree V6, BOP V8 and V6, Vega/Monza Durabuilt 140, Isuzu 4 cylinder used with the GM T platform (Chevette incl. the Buick/Opel by Isuzu (rebadged Isuzu Gemini) and Chevrolet LUV), and the 2.8 bolt pattern (used with the early production Chevrolet S10/GMC S-15s with a 4 cylinder (incl Tech IV) or 2.8L). | + | The TH200 was introduced during the 1976 model year - also the first GM transmission with metric fasteners. As with the TH350/400, its a 3 speed transmission, with 1979-87 production models using lockup torque converters. TH200s have a one-piece case design which resembles a Powerglide without a bolt on tailhousing. TH200s also lack a vacuum modulator where a throttle valve cable is used to control shift points (similar to the Chrysler Torqueflite, TH2004R, and THM700R4/4L60). Unlike the later GM overdrives, TH200s have a cast iron pump. TH200 (including the TH200C) have the following bellhousing patterns - Chevrolet V8/inline six/90 degree V6, BOP V8 and V6, Vega/Monza Durabuilt 140, Isuzu 4 cylinder used with the GM T platform (Chevette incl. the Buick/Opel by Isuzu (rebadged Isuzu Gemini) and Chevrolet LUV), and the 2.8 bolt pattern (used with the early production Chevrolet S10/GMC S-15s with a 4 cylinder (incl Tech IV) or 2.8L). Although considered a light duty transmission, when used with some heavier vehicles e.g. GM B or G-bodies, this has resulted in a high failure rate where its common for the TH200 to be swapped out with a TH350. Although not intended for heavy duty usage, the TH200 has been used as Powerglide substitute where Scott McClay Engineering has improved the TH200's weak points by using some TH2004R internals. |
| − | TH200-4R was introduced in 1981 which uses some internals from the TH200/200C along with improved hard parts - oil pump design uses pump vanes in lieu of pump gears (this design is shared with the 700R4/4L60E). As a result of the redesigned one piece case resembling a scaled down TH400 to accommodate the overdrive assembly, the transmission mount is located in the same location as a short tailhousing TH400. | + | TH200-4R was introduced in 1981 which uses some internals from the TH200/200C along with improved hard parts which has plagued the original TH200 design - oil pump design uses pump vanes in lieu of pump gears (this design is shared with the 700R4/4L60E). As a result of the redesigned one piece case resembling a scaled down TH400 to accommodate the overdrive assembly, the transmission mount is located in the same location as a short tailhousing TH400. |
====Identifying transmissions in the TH200 family==== | ====Identifying transmissions in the TH200 family==== | ||
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