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During the development of the 9TXX, GM received 60 new patents while building 800 prototypes. [4] It was developed from the 6T41 (Gen 3) [5] and designed to occupy approximately the same volume as that prior six-speed automatic and retain that transmission's on-axis design, which aligns all the planetary gears with the crankshaft.
It reports real-time sensor data, component overrides, and Diagnostic Trouble Codes. The specification for this link is as defined by GM's Emissions Control System Project Center document XDE-5024B. [4] [5]
Show stored Diagnostic Trouble Codes 04: Clear Diagnostic Trouble Codes and stored values 05: Test results, oxygen sensor monitoring (non CAN only) 06: Test results, other component/system monitoring (Test results, oxygen sensor monitoring for CAN only) 07: Show pending Diagnostic Trouble Codes (detected during current or last driving cycle) 08
The police package (9C1) B-body cars featured a First Gear Block Out (FGBO) Plate on the transmission housing to prevent drivetrain damage. The shift point for first to second gear is about 43 MPH (69 km/h) while second to third gear shift point is about 83 MPH (134 km/h) assuming a 3.08:1 differential and a 5,500 RPM engine speed limit.
2005–present 6L80 · 6L90 — 6-speed heavy-duty (used in GM trucks and performance cars) 2014–present 8L 90 — 8-speed heavy-duty (used in GM trucks and performance cars) 2016–present 8L 45 — 8-speed light-duty (used in GM luxury cars) 2017–present 10L80 — Ford-GM 10-speed automatic (used in GM light trucks pickups and related SUVs)
MAP sensor data can be converted to air mass data by using a second variable coming from an IAT Sensor (intake air temperature sensor). This is called the speed-density method. Engine speed (RPM) is also used to determine where on a look up table to determine fuelling, hence speed-density (engine speed / air density).
The "MN4" 4T40E is able to handle vehicles up to 4000 lb (1814 kg) GVWR. The final drive ratio can vary depending on the car's curb weight and engine power output. 3.91, 3.63, 3.29, 3.05, 3.69, and 3.42 are all of the available ratios used in the 4T40 (and 4T45) transmission; Made possible by using combinations selected from 3 different sprocket combinations (32/38, 35/35, 33/37) and 2 ...
A heavy-duty 4T60-E HD was produced in 1996 for the supercharged GM 3800 engine The 4T60-E was phased out in favor of the 4T65 beginning in 1997. The 4T60-E featured a 245 mm (9.6 in) torque converter with varying stall speed and gear ratios. For example, a 1995 Beretta features a 1650 rpm stall converter as opposed to a 1999 Century converter ...