The Jatco CVT used in the Dodge Caliber, Jeep Patriot, and Jeep Compass
Chrysler's only continuously variable transmission (CVT), not counting hybrids, was used on the Dodge Caliber, Jeep, Compass, and Jeep Patriot, all built together, on the same platform, in the same plant.
The early version was criticized and a reprogrammed version, dubbed CVT2, replaced it. The CVT2 had more precise ratio control, and added manual control by simulating six gears. Chrysler claimed the CVT2 brought 6%-8% higher gas mileage than a traditional 4-speed automatic - roughly the same savings as the original CVT.
The CVT transmission used two V-pulleys and a steel push belt to vary the "gear" ratio. The transmission engaged the torque converter clutch almost immediately when accelerating, and kept it engaged, eliminating slippage. Continuously varying the transmission ratio allows the engine to stay in its most efficient operating range.
There was no part-throttle downshift; to get full acceleration, drivers pushed the gas pedal down further. The engine might not change rpm as one accelerated, making some feel as though there wasn't any power.
The CVT was designed and built by Jatco, a joint venture of Nissan and Mitsubishi, using Chrysler electronics and programming. In the 2010 models, the CVT was given "tip start" and a moderate gas-mileage boost.
The CVT was used with both front and all wheel drive versions of the cars; an electronically controlled coupling managed front-rear torque split; it could run on 100% front wheel drive to save fuel, but brought in the rear wheels between 25 and 65 mph for better traction.
The Freedom Drive II Off-Road Package allowed the Jeep Patriot to be certified as Trail Rated; it included a version of the CVT with a low range (CVT2L) bringing a best-in-class 19:1 low ratio.
Why AutoStick was added
ImperialCrown wrote:
Even before AutoStick was added, a "low gear" mode was included for these reasons.
Origins of the CVT in Dodge and Jeep cars
Stas Peterson wrote in March 2010:
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Chrysler's only continuously variable transmission (CVT), not counting hybrids, was used on the Dodge Caliber, Jeep, Compass, and Jeep Patriot, all built together, on the same platform, in the same plant.
The early version was criticized and a reprogrammed version, dubbed CVT2, replaced it. The CVT2 had more precise ratio control, and added manual control by simulating six gears. Chrysler claimed the CVT2 brought 6%-8% higher gas mileage than a traditional 4-speed automatic - roughly the same savings as the original CVT.
The CVT transmission used two V-pulleys and a steel push belt to vary the "gear" ratio. The transmission engaged the torque converter clutch almost immediately when accelerating, and kept it engaged, eliminating slippage. Continuously varying the transmission ratio allows the engine to stay in its most efficient operating range.
The CVT was designed and built by Jatco, a joint venture of Nissan and Mitsubishi, using Chrysler electronics and programming. In the 2010 models, the CVT was given "tip start" and a moderate gas-mileage boost.
The CVT was used with both front and all wheel drive versions of the cars; an electronically controlled coupling managed front-rear torque split; it could run on 100% front wheel drive to save fuel, but brought in the rear wheels between 25 and 65 mph for better traction.
The Freedom Drive II Off-Road Package allowed the Jeep Patriot to be certified as Trail Rated; it included a version of the CVT with a low range (CVT2L) bringing a best-in-class 19:1 low ratio.
Why AutoStick was added
ImperialCrown wrote:
Pat added: "One reason for including Auto-stick with a CVT is for driver control. This allows for a fixed ratio to lower the ratio for hill descent, or pick a higher starting ratio for moving from a stop under slippery conditions like ice or snow."
Even before AutoStick was added, a "low gear" mode was included for these reasons.
Origins of the CVT in Dodge and Jeep cars
Stas Peterson wrote in March 2010:
Home •
Engines •
Reviews •
Chrysler 1904-2018 •
Upcoming •
Trucks •
Cars
Spread the word via <!--Tweet or--> Facebook!
We make no guarantees regarding validity or accuracy of information, predictions, or advice - .
Copyright © VerticalScope Inc. All rights reserved. Dodge, Jeep, Chrysler, Ram, and Mopar are trademarks of Fiat Chrysler Automobiles.