Web27 Jan 2009 · I'm thinking of scratching the plans of a 3.50 rear gear and a 4L80e transmission for a 3.25 or even a 3.00 rear gear and a TH400 for the better torque converter choices. For recap: I am building a 1000-1200HP motor to put my chevelle through the traps at 150+mph, but I want to cruise 85mph between 2500 and 3000RPM. WebThe TH400 is an automatic shift, three-speed, longitudinally positioned transmission. It is widely regarded to be a supremely durable and legendary transmission. The TH400 is conservatively rated at 450 ft. lbs. of input …
The GM TH400 Transmission: An Overview - Gearstar
WebThe 4L80E is the descendant of the “Ole Reliable” TH400 transmission. It shares many components and design features. ... (allows 2nd or even 3rd gear launch) $9240: 4L80-5ATB3-210: Auto shift with D3 transbrake and … Web7 Jul 2007 · Old TH400 @ 2500 RPM = 70 MPH New 700r4 @ 1750 RPM = 70 MPH So I guess I should be thinking Target 2100 RPM @ 70 MPH = 3.70 gear needed? That should improve MPG from TH400 by lowering 70 MPH needed engine speed by 400 RPM Or, if I turn off lockup converter, RPM's will increase about 300 RPM. hub international b2b
TH350 Vs TH400 Vs 4L60E Vs 700R4: Which Is The Best? - Chevy …
WebThis item ships UPS. In stock and ships today if ordered by 3pm ET! Details. "SUPER MEGA XL" 258MM XTRA-LITE BILLET SERIES ALUMINUM LOCK-UP CONVERTER. • BOLT … Web25 Jan 2005 · Transmission Talk TH400 locks up (transbrake) TURBO 6 Jan 23, 2005 T TURBO 6 Beer Snob Staff member Jan 23, 2005 #1 OK Guys I changed the intermediate sprag and the car still does not move in second. The sprag is on correctly (turns clockwise). When I put the tranny in second it loads the motor. WebThe legendary TurboHydramatic TH400 automatic transmission was the 4L80E transmission’s immediate predecessor. It is constructed to a great extent on the 400 in strength and parts. The 4L80E also features a lock-up torque converter, an added overdrive gear, as well as state-of-the-art electronic controls. hog wreckers