The intermediate overrun band is installed, followed by 3 heavy duty high energy intermediate frictions.Ĩ. A hardened intermediate clutch race and heavy duty roller sprag are then installed on the direct clutch drum and it is placed in the case.
This drum is also modified to increase the apply area of the piston by 100 percent over the stock setup.ħ. Heavy duty high energy frictions and heavy duty steels are installed. The direct clutch drum is then inspected before the piston and seals are placed into the drum. The wave cushion plate is omitted, when possible, to add an additional friction.Ħ. Then the new Performance high energy frictions and heavy duty new steels are installed. The forward clutch drum is carefully cleaned and inspected before the piston and seals are replaced into the drum. The rear end-play is checked and adjusted as needed to precise tolerances.ĥ. The front planetary is inspected and installed along with the shaft support clip. The sun shell and gear are then inspected and installed with bushings to ensure a good center clearance, which is important for high rpm driving. Next, the heavy duty low roller clutch and support are installed along with the case reinforcement insert.Ĥ. The rear planetary set is then inspected and installed in the case, followed by the high energy low reverse frictions and new steel pressure plates, all set for ideal clearance for racing and high speed down shifts. New seals are installed, the piston is carefully installed in the case and static air tested for proper “apply”.ģ.
TH350 TRANSMISSION MANUAL
These are a high-stress point in the TH350 when used heavily for manual down shifts. The low reverse piston is then inspected and replaced as needed. As the case cools it is painted with a high gloss paint/sealant providing an excellent finish and sealing it from the elements.Ģ. Then the case is heated to approx 250 degrees to remove all water and to allow for additional inspection and testing. The case of each unit is carefully inspected, checked for cracks and stress, and cleaned in our heavy duty parts cleaner. Its features include the following components and modifications (nothing but the best):ġ. Both 2wd and 4wd versions of the 350 can be used equally well, and there are no inherent advantages to either one once you have installed our adapter assembly.The PerformaBuilt Performance TH350 Transmission “Full Auto/Manual Stick” allows you to hold any gear to any speed, down shift at any speed, and is street friendly. This transmission makes an excellent conversion transmission due to its adaptability into most Jeeps. FeaturesĪ turn-key TH350, professionally built, OEM style or adapted and delivered to your door - ready for a variety of engines and Jeep transfer cases. There were downsized derivatives of the TH350, designated TH200, TH200C, TH250, TH250C & TH375 a beefed up Buick version. The TH350C had codes of MV4, MX2, MX3 & MX5. The conventional TH350 had part codes of M33, M38 & M39. When paired with an aftermarket TCC control unit, these can be desirable transmissions, and up to 10% more efficient at cruising speeds. The TH350-C lockup version can be identified by an electrical plug on the left side of the transmission. This later version had an electronic lock-up converter to increase fuel-efficiency at cruising speeds. The TH350-C was the lockup torque converter version introduced in the late 1979 model year, and was produced through 1984. At the right rear of the case is the modulator. It has a distinctive oil pan that is chamfered at the passenger side, rear corner. The 350 transmission is 21-3/4" long and its one-piece case is cast of aluminum alloy. The Turbo 350 is the shortest and one of the strongest automatics that can be put into a Jeep. It was phased out of use and superceded by GM's 700R4 starting in 1982. It was typically paired with Small Block V6 & V8 engines. The HydraMatic 350 transmission was prevalent in nearly all GM, rear-wheel-drive cars and trucks through 1984. The Turbo 350 quickly become known for its strength, versatility and compactness. Jointly developed by Chevy and Buick, it is also referred to as the CBC (Chevrolet-Buick Combined) 350. The TH350 transmission was introduced in the 1969 model year as the successor to the GM Powerglide automatic transmission. It is widely considered to be one of the greatest of automatic transmissions ever built. The TH350 is an automatic shift, three-speed transmission.
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