The 2015 Corvette Z06′s New 8-Speed Transmission: Old Tech Makes a New Comeback

Posted by on Friday, February 28th, 2014

The new Corvette 8-speed transmission

The new Corvette Z06′s 8-speed transmission.
Image source: General Motors via

With all the talk these days of dual-clutch and continuously-variable technology, it seems that traditional automatic transmissions are going the way of the dinosaurs. Those who have put planetary gearsets on the endangered species list are in for a surprise, however. GM’s new eight-speed 8L90 transmission, which lies at the heart of the 2015 Corvette Z06, proves that this classic piece of automotive engineering isn’t down for the count just yet.

The Corvette Z06 was unveiled in January at the Detroit Auto Show. The next-generation supercar won instant accolades from the automotive press. All this praise is as much about what the Z06 takes from the past as the ways that it heralds the future.

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The PDK: Groundbreaking Porsche Transmission Enables Both Automatic and Manual Shifting

Posted by on Thursday, February 27th, 2014

Porsche 997

The beautiful Porsche 997.
Image source: Wikimedia Commons

Semi or Auto?  The Best of Both Worlds.

The PDK automatic was introduced in 2009 for the 997-series 911, though it’s also available for the 2012 991 Carrera and Carrera S releases. It fits into the general category of semi-automatics, or dual-clutch transmissions. The idea behind this unusual design is to give drivers the option of letting the vehicle’s computers handle the shifting or taking over the task for themselves, all without having to worry about a floor pedal.

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The 6F50 for 2014 Ford Explorer: Raising the Bar for Automatic Transmissions

Posted by on Wednesday, February 26th, 2014

Gears from a typical automatic transmission

Gears from a typical automatic transmission.
Image source: Wikimedia Commons

Ford’s and GM’s partnership in the early 2000s reaped rich dividends, not just for the respective companies, but for the automotive world in general. Case in point: the 6F50/6T70, one of the most popular six-speed automatic transmissions on the market. It continues to offers drivers expanded levels of economy, handling, and performance even years after it was first introduced. It just goes to prove that, even in a free enterprise economy, cooperation sometimes trumps competition.

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The SR80/ZF6HP26 Car Transmission: Leading Mustang into the Next 50 Years

Posted by on Tuesday, February 25th, 2014

6R80 car transmission

A 6R80 transmission on display.
Image source:

As the 50th anniversary edition of the quintessential American pony car, the 2014 Ford Mustang has a lot riding on it, including the pride and prestige of the newly revitalized Ford Motor Company. That probably explains why the Dearborn-based manufacturer pulled out all the stops to make the vehicle a winner in every sense of the word. This includes the available 6R80 six-speed transmission at the heart of the drivetrain.

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Prepare the 4L80E Transmission in Your Chevrolet Avalanche for the Snow

Posted by on Monday, February 24th, 2014

The 4L80E is a very heavy-duty four-speed automatic transmission designed and built by General Motors. It is deeply based on the three-speed TH400 automatic transmission, with the main differences being the additional overdrive gear and full electronic controls. It was first put into use back in 1991 and continued to be a optional transmission in the GM lineup through the end of the 2002 model year. The 4L80E was found most often in heavy duty vehicles, such as pickup trucks, vans, SUV’s and special option motor home applications. Some of those vehicles include the GMC Sierra, the Yukon, the Tahoe, the Suburban, and the GMC Savana. It was also sold to other manufacturers for use in the Bentley Continental, the Jaguar XJ12, and the Astin Martin DB7. In addition is was found in the Chevrolet Avalanche.

Chevrolet introduced the Avalanche back in 2002. It was a hybrid mix between a pickup truck and an SUV. It had a bed that could carry a full-size piece of wood while still comfortably seating six grown adults. It could be ordered with the optional heavy duty 4L80E automatic transmission.

Avalanche with 4L80E transmission

The Chevrolet Avalanche.
Image source: Wikimedia Commons

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How To Get The E4OD In Your Ford F150 Ready For The Snow

Posted by on Friday, February 21st, 2014

The E4ODis one of the first four-speed automatic transmissions made by the Ford Motor Company. It is based roughly on the C6 three-speed heavy duty transmission and is related to the 4R100 automatic transmission. The E4OD transmission was used in many Ford Motor Company products, including the E-Series Ford vans, the Ford Bronco SUV, the Expedition SUV and the full line of F-Series pickup trucks.

The F150 came with the E4OD transmission

Image source:

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Prepare The 4L85E Automatic Transmission In Your GMC Yukon For Off Road Fun

Posted by on Thursday, February 20th, 2014

The 4L85E is a four-speed automatic transmission designed and built by General Motors. It comes from the same family of transmissions that includes the 4L80E. Both are very strong transmissions. The 4L80E is rated to handle 450 lb-ft of torque, while the 4L85E is rated slightly higher at 460 lb-ft. Both these transmissions are based on the original heavy duty TH400 three-speed transmission. General Motors used the 4L85E in a number of vehicles, including the Chevrolet Avalanche, the Chevy Express van, the GMC Savana and the Chevy Suburban.  It was also used in the GMC Yukon.

GMC Yukon

GMC Yukon image from

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Get The AOD Transmission In Your Mustang Ready For Race Season

Posted by on Wednesday, February 19th, 2014

The AOD transmission is a four speed automatic developed and built by the Ford Motor Company. It was one of Ford’s first overdrive automatic transmissions. A number of other transmissions followed in its path, including the AODE, the 4R70W and the 4R75W. This transmission was used in a number of popular Ford vehicles, including the Ford F-series trucks, the Crown Victoria, the Mercury Grand Marquis and the Lincoln Town Car. It was also used in the Ford Mustang for 1994 – 1995.

95 Ford Mustang

95 Ford Mustang image from

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Get The 700R4 Transmission In Your Firebird Ready For Race Season

Posted by on Tuesday, February 18th, 2014

The 700R4 is a four-speed automatic transmission developed and built by General Motors. It is available in both two-wheel drive and four -wheel drive models. It is one of GM’s very first overdrive automatic transmissions. The 700R4 is closely related to the 4L60E, with the biggest difference being the lack of electronics in the 700R4 , when compared to the 4L60E. Very early 700R4s were prone to failure, but as they progressed through their life cycle, they became much more durable. The first 700R4 was introduced in the new for 1983 Chevrolet Corvette. It was the talk of the town and very advanced for its day. Eventually the 700R4 could be found in the Chevy Impala, the Camaro, the S10 pickup, the GMC Jimmy, the Canyon and Sonoma, and the Pontiac GTO. It was also found in the extremely popular Pontiac Firebird.

Pontiac Firebird

The Pontiac Firebird. Image from

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Prepare the 4L60E transmission In Your S10 Blazer For Towing

Posted by on Monday, February 17th, 2014

The 4L60E is a four speed automatic transmission developed and built by General Motors. It is available in both two-wheel drive and four-wheel drive models. The 4L60E is a decedent of one of GM’s very first automatic overdrive transmissions, the 700R4, and the 4L60. The 4L60E first came into use in 1991 and remained in the GM lineup though the end of the 2008 model year. It was used in a wide variety of vehicles including the Buick Rainier and Roadmaster, the Cadillac Escalade, the Brougham and the Fleetwood, and the Chrolet Astro, Camaro, the Corvette, the Caprice, the Silverado, the Suburban, the SSR and the TrailBlazer. It was also used in the popular S10 Blazer.


Image from

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