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12-22-2009, 09:20 PM #1
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Black- 383 Procharged & N20 Vert
1974 Trans Am SuperMatic Transmission - Shiftless
1974 Trans Am SuperMatic Transmission - Shiftless Pleasure
Part II: Bolting A 4L85-E SuperMatic Transmission Into A 503hp / 522 lb-ft Of Torque '74 SD-455 Trans AmAs you learned reading Part I of this story in the last issue, our plan is to install GM Performance Parts' (GMPP) new 4L85-E SuperMatic four-speed Overdrive (OD) transmission (PN 19154550) and its included lockup converter (approximately 1,800-to-2,000-rpm stall speed) in HPP contributor Melvin Benzaquen's street/strip '74 SD-455 Trans Am. Many of the advantages of this new transmission over the original Turbo 400 and the previous GM O.D. boxes like the 200-4R, 700-R4, 4L60-E, 4L65-E, 4L70-E, and 4L80-E were discussed in Part I, so here is a very brief review.inline_mediumwraptextrightClassic Restorations tech Scott Hand lowers the Turbo 400 trans from the SD-455 T/A as the 4L85-E SuperMatic awaits installation.27417916/tech/hppp_1003_1974_trans_am_supermatic_transmissionhpp p_1003_01_z+1974_trans_am_supermatic_transmission+ turbo_400_trans.jpgTrue
Photo Gallery: 1974 Trans Am SuperMatic Transmission - High Performance Pontiac
Photo Gallery: 1974 Trans Am SuperMatic Transmission - High Performance Pontiac
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