Acura TL Workshop manual (1995-1998 )

Torque Converter, Gearsand Clutches
The torque converter consists of a pump, turbine, and stator, assembled in a single unit. They are connected to the engine crankshaft so they turn together as a unit as the engine turns. Around the outside of the drive plate is a ring gear which meshes with the starter pinion when the engine is being started.

The entire torque converter assembly serves as a flywheel while transmitting power to the transmission mainshaft. The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in line with the engine crankshaft. The mainshaft includes the 1st, 4th and 2nd clutches and gears for 4th, 1st, 2nd and reverse (3rd gear is integral with the mainshaft). The countershaft includes the 3rd, 1st-hold and reverse clutches, and gears for 3rd, 4th, 1st, 2nd, reverse and parking. The secondary drive gear is integrated with the countershaft. The gears on the mainshaft are in constant mesh with those on the countershaft. When certain combinations of gears in the transmission are engaged by clutches, power is transmitted from the mainshaft to the countershaft to provide and positions.

Electronic Control
The electronic control system consists of a Powertrain Control Module (PCM), sensors, a linear solenoid and four solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions. The PCM is located below the dashboard, under the front lower panel on the passenger's side.

Hydraulic Control
The lower valve body assembly includes the main valve body, the secondary valve body, the throttle valve body, the linear solenoid, the shift control solenoid valves and the ATF passage body. They are bolted on the lower part of the transmission housing. The regulator valve body, the ATF pump body, and the accumulator body are bolted to the torque converter housing.

The main valve body on '96 model contains the manual valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the 4-3 kick-down valve and the Clutch Pressure Control (CPC) valve. The main valve body on '97 model contains the manual valve, the 1-2 shift valve, the 2-3 shift valve, the 3-4 shift valve, the 4-3 kick-down valve and the main orifice control valve. The secondary valve body on '96 model contains the 3-4 orifice control valve, the 4-3 shift timing valve, the modulator valve and the accumulator pistons.The secondary valve body on '97 model contains the 3-4 orifice control valve, the 4-3 shift timing valve, the line pressure control valve, the modulator valve and the accumulator pistons. The throttle valve body includes the throttle valve which is bolted onto the secondary valve body. The linear solenoid is joined to the throttle valve body. The regulator valve body contains the regulator valve, the lock-up shift valve and the cooler relief valve. Fluid from the regulator passes through the manual valve to the various control valves. The ATF pump body contains the lock-up timing valve, the lock-up control valve and the relief valve. The torque converter check valve is located in the torque converter housing under the ATF pump body. The accumulator body contains the accumulator pistons. The reverse accumulator and the 1st-hold accumulator pistons are assembled in the rear cover. The 1st, 1st-hold, 2nd and reverse clutches receive fluid from their respective feed pipes, and the 3rd and 4th clutches receive fluid from the internal hydraulic circuit.

Acura TL Repair manual (1995-1998 )
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