VTi transmission
From Wikipedia, the free encyclopedia
The VTi is a continuously variable transmission for automobiles. It is fully automatic, electronically controlled, and designed for transverse front-wheel drive use. The VTi is assembled at a General Motors/Fiat joint venture plant in Szentgotthard, Hungary.
Quality issues delayed the introduction of the VTi until the second quarter of 2002. Production ended in 2005 in favor of the GM-Ford 6-speed automatic transmission.
The VTi can handle a maximum of 200 N·m (147 ft·lbf) of torque for vehicles weighing up to 2100 kg (4630 lb), with gear ranges from 2.61 to 0.44. A 2.15 reverse gear is also specified. The effective final drive ratio is 4.35.
It uses two sets of 12 steel bands (Van Doorne belts) inside a die cast aluminum casing. GM claims that the CVT's bands, normally a weak spot in CVTs, are reliable for at least 100,000 miles (161,000 km) . A 225 mm (8.9 in) torque converter is also used.
In 2004 GM extended the transmission's warranty on all 2002 - 2004 GM vehicles with the VTi to 5 years / 75,000 miles (120,700 km) due to high failure rates.
Applications:
- 2002–2004 Saturn Vue (GMT315)
- 2003–2004 Saturn Ion Quad Coupe
- Opel Astra
[edit] References
- "GM bets on CVT, Vue. on the Saturn Vue - Will introduce its continuously variable transmission CVT" (Nov 1). Ward's Auto World.
- "GM to restart VTi production, extend warranty" (March 13). SaturnFans.com.
