This is a one-piece.Ġ8| The 10-inch billet-cover Yank torque converter features lock-up for better fuel economy and lower fluid temps. The later ones have two-piece case and are used behind LS engines. The harness from the MSD TCM plugs into the trans here, at the top of the valvebody.Ġ7| There are two 4L60E models: the one-piece case is an early one that came behind conventional small-blocks. An MSD Atomic Transmission Control Module (TCM) will be the brain of the transmission and will control the valvebody, eliminating the need for a throttle valve cable that you’d find on a 700-R4 or 200-4R. This 4L60E transmission can handle up to 650 hp and 600 lb-ft of torque, which is plenty for the 383ci small-block currently in the ElCo, and will become necessary if Finnegan installs nitrous.Ġ6| Here’s the “E” part of the 4L60E, at least what’s visible. The converter is already installed, you get the right amount of fluid, and there’s a proper dipstick. This was also the point where he removed the linkage and transmissions-fluid lines from the trans case, clamping them back to minimize leakage.Ġ4| After unbolting the crossmember from the frame and the crossmember from the trans, Finnegan removed the bolts on the bellhousing and torque converter, allowing the trans to be lowered using the transmission jack.Ġ5| One thing that’s very cool about Gearstar is that it send everything. That means this driveshaft will need to be shortened.Ġ3| Finnegan planned to replace his headers while the car was on the lift, and removing the headers provides a lot of room for the trans to drop down, so those came off next. TH350s installed in trucks used a long tailshaft, making them the same overall length as a 700-R4 and 4L60E overdrive, while the TH350 installed in car is shorter. 01| The Level 4 Gearstar 4L60E four-speed isn’t much larger than the three-speed TH350 that was original equipment in the ’69 El Camino of Roadkill’s Mike Finnegan – yet it’s much stronger, allows precision adjustment of shift points and firmness, and adds a freeway-friendly 0.70:1 Overdrive.Ġ2| First out was the driveshaft.
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