Additional bushing area, close attention to bushing clearance, blueprinted pump assembly, select cores used, and other areas that our experience has shown other shops and builders are not paying attention to. It is the most important one because the first thing one can easily measure is the whole length of transmission and in the case of th350 the length of the transmission is 33 inches and that of th400 is 38 inches precisely measured only if both are using the longest shaft available. It has several key modifications that increase it’s strength. Stage 1 TH350 is reliable to over 500 HP/TQ. TH350, Automatic Transmissions in-stock with same-day shipping. Providing a REBUILDABLE core will be a credit toward your build price. Automatic transmission for 4WD trucks Manufactured with premium components to withstand the demands of up to 550 HP engines Includes embossed TCI oil pan. Shop TH350, Automatic Transmissions and get Free Shipping on orders over 149 at Speedway Motors, the Racing and Rodding Specialists. So, when bolting an older transmission like a Powerglide, TH350, TH400, 2004-R, or early 700-R4 to an LS engine, there will be a 0.400-inch gap between the flexplate and the torque converter. All TH350 builds now have a $450 core charge due to core shortages. The LS family of engines (with one exception that we will detail) places the crank flange flush with the bellhousing mounting surface. All TH350 transmissions include a new pan. Our base model TH350 has lived at over 600 HP reliably.Īs with all Jake’s Performance transmissions they include all new friction clutches, bands, steel plates, soft parts, filter, modulator (if applicable), as well as hydraulic upgrades, and other modifications depending on power level. Our goal is to provide long term reliabilty. There are aftermarket planets available to make them live at even higher power levels but we usually recommend a TH400 for a dedicated 600+ HP application. Speedometer drive gear and driven gear not included. Can be used with adapter 555-60170 to work with the Chevy bolt pattern. Removal of the kick-down block-off plug voids the warranty. Designed to work without a throttle valve or kick down cable. The limiting factor is the stock planetaries. JEGS 555-60305 GM TH350 Performance Transmission Features: Handles Up To 450 HP. If wanting to keep an auto most would rather skip the 700r4 and go to a 4l80e. An NV4500 is a pretty easy swap and nets best of both worlds but in a 5 speed package. We feel they are a very good choice in cars up to 600 HP/TQ but capable of up to 800 HP/TQ especially in lighter cars. A 700r4 will sacrifice some dependability and simplicity for an OD gear ratio compared to your th350. It is widely considered to be one of the greatest of automatic transmissions ever built. Deep into the 10’s without failure, they have proven to be a very tough unit for a reasonable price. The TH350 is an automatic shift, three-speed transmission. We have an excellent track record with our TH350’s.
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