What is TAPshift? Features & technical parametres of the gear box

What is TAPshift? Features & technical parametres of the gear box

TAPshift (Touch Activated Power) is a manual shifting mode implemented on automatic transmissions. It is used on vehicles produced by the General Motors Group. In particular, on Saturn, Pontiac, Cadillac, and Chevrolet cars.

Operating principle

TAPshift is offered for electronically-controlled Hydramatic transmissions. Paddle shifters with “+” and “-” markings are used for shifting in manual mode. For this, the gear lever should be in the DSC position.

Popular TAPshift transmissions

Transmission code Number of gears Max torque, Nm Max engine capacity, l Drive type Production start Model applications
6L90 6 900 6.5 RWD, AWD 2006 Chevrolet Silverado; Chevrolet Camaro; Cadillac CTS-V
6L80 6 800 6.2 RWD, AWD 2006 Chevrolet Corvette; Chevrolet Tahoe; Chevrolet Camaro; Cadillac Escalade; Chevrolet Silverado; Holden VF Commodore; Cadillac XLR
6L50 6 500 5.3 RWD, AWD 2006 Cadillac CTS; Holden Statesman; Cadillac SRX; Chevrolet Caprice; Cadillac SLS; Chevrolet Colorado; Cadillac STS; Holden Commodore
6Т40 6 250 2.5 FWD, AWD 2007 Chevrolet Malibu; Chevrolet Equinox
8L90 8 1000 6.5 RWD, AWD 2015 Chevrolet Corvette; Cadillac ATS-V; Chevrolet Silverado; Cadillac Escalade; Cadillac CT6; Chevrolet Camaro; Cadillac CTS-V

Common malfunctions of TAPshift transmissions

Malfunctions Transmissions
Bushes and seals break down rather fast. GM 6L90; GM 6L50
The transmission pump can seize during continuous high-speed driving.  GM 6L90; GM 6L50; GM 6L80
The gearbox hub has a short lifespan. GM 6L90; GM 6L80
Mechanical parts of the transmission wear out prematurely due to insufficient fluid. GM 6L80
The wave plate gets destroyed, which can lead to other transmission elements being damaged. GM 6Т40
The hydraulic valve body channels get clogged if fluid is not replaced on time. GM 6Т40; GM 6L90; GM 6L80
The transmission is prone to overheating. GM 6Т40
Clogged solenoids cause the transmission to jerk. GM 8L90

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