GM Transmission Development Underway at Lentech

After over 20 years of offering industry leading Ford overdrive transmissions, Lentech Automatics is currently evaluating a GM overdrive lineup. In response to the growing popularity of the LS engine platform on the performance scene, we purchased a Chevrolet SSR to serve as a testbed for the first product we plan to offer: a 6 speed 4L80E based overdrive. This will perfectly compliment the modified all-aluminum 5.3L (LM4) engine, and add better durability and performance over the original 4L60E. Come back to visit this page as we update with more photos, and add videos.

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Project Specifications

Project: 2004 Chevrolet SSR
Stock Engine: 300 hp, 5.3L all-aluminum V8 (RPO LM4)
Original transmission: GM 4L60E
Stock dyno result: 268 rwhp
Best stock 1/4 mile: 15.38@88 mph
Engine upgrades: Total Engine Airflow CNC heads, LJMS cam (219/224 @ 0.050, 0.606/0.603 lift), Stainless Works 1 7/8 longtube headers and true dual exhaust, GM Vortec 8100 fuel injectors,
Upgraded transmission: Lentech 6 speed 4L80E (paddle shift coming soon)
Modified dyno result: 369 rwhp/339wtq
Best to date 1/4 mile: 14.46@97mph
Power adder: Nitrous Outlet 78mm GM truck plate kit
Nitrous dyno results: 412whp/400wtq (50 shot), 475whp/455wtq (100 shot)

We would like to thank the following sponsors / partners for their involvement in Project SSR


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