ETE REMAN Blog

From Beginning to Now: The Evolution of The Automatic Transmission

Posted by on Wednesday, January 21st, 2015

An automatic transmission is an integral part of your car. Image source: Wikimedia Commons

Learn about the amazing evolution of automatic transmissions.
Image source: Wikimedia Commons

Even those individuals who are very experienced with repairing and replacing transmissions don’t know very much about their history. It’s one of the few areas where history doesn’t seem to be required, but the more you know, the better a mechanic you can be. With that being said, let’s talk about the evolution of the automatic transmission as a whole and how it has changed since the 1930s.

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What To Do If The 4L60E Transmission Starts Acting Up In Your 1995 Z28

Posted by on Tuesday, January 20th, 2015

The 4L60E is a four speed automatic transmission designed and built by General Motors. It is heavily based on the very first automatic over drive transmission built by General Motors, the 700R4. Besides some fixes to repair very early 700R4 transmissions, the biggest difference between the two in that the 4L60E is a full electronic transmission.  The 4L60E transmission comes from a family of transmissions that include the 700R4, the 4L60 and the 4L65E. The 700R4 is equipped with a very steep 3.06:1 first gear ratio which help give this transmission and the vehicle it is installed in excellent off the line performance.

Likewise, the 4L60E is equipped with a very sweet over drive gear ratio of 0.70:1 (30% over driven) that really helps increase gas mileage, especially at highway speeds.  The 4L60E found its way into many GM vehicles, including the Chevy Suburban, the Corvette, The Impala SS, the Silverado full size pickup truck, the GMC Jimmy and the S-10 Blazer. It could also be found in the Chevrolet Camaro.

Chevy Camaro Z28

A Z28 from 1972. Image from Wikimedia Commons

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Modifying Your 1970 Chevy C10 For Performance? Don’t Forget About The TH350 Transmission

Posted by on Monday, January 19th, 2015

The Th350 is a three-speed automatic transmission built by General Motors for use in their many car and truck divisions. It was first put into production in 1969 and lasted through most of the 1980 production year. It was eventually replaced by the TH350C, which was basically the same transmission as the Th350 with the addition of a lockup torque converter.  The TH350 is equipped with a 2.52:1 first great ratio, which is not great for better performance takeoff nor for gas mileage.  Third gear is the standard 1:1 ration.  The Th350 was a widely used transmission, and could be found in cars like the Caprice, the Camaro, the Corvette, the Cutlass, the Nova, the GTO and the Chevy full size van. It was also available as an option in the Chevrolet C10 pickup truck.

Chevy C10

Image from WIkimedia Commons

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Getting the Job Done: The Tools You Need For a Transmission Rebuild

Posted by on Friday, January 16th, 2015

An automatic transmission is an integral part of your car. Image source: Wikimedia Commons

Learn about the various tools that you’ll need for a transmission repair or rebuild.
Image source: Wikimedia Commons

As one of the more important components of a vehicle, you need to promptly repair transmission damage to ensure that it doesn’t build up to a dangerous level. There are specialized tools that you’ll need to get the job done. Even if you’re very experienced with working on vehicles, there’s no way to undergo a transmission repair without the proper tools. With that being said, here are a handful of tools that you should definitely consider having before starting on any transmission replacement or repair.

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Pick The Proper Performance Upgrade For The 6L80 Transmission In Your Pontiac G8

Posted by on Tuesday, January 13th, 2015

The 6L80 is a six-speed automatic transmission built by General Motors. It shares many parts in common with another GM transmission; the 6L90. The 6L80 was designed to replace both the earlier 4L60E and the 4L8oE. The 6L80 was eventually replaced by the 8L90, an eight speed automatic transmission. The 6L80 comes equipped with a very step 4.027: ratio first gear ratio would provide unbelievable acceleration in first gear. It is also blessed with double overdrive gear. Fifth gear come with a 0.85:1 ratio (15% over driven) and six gear comes with a 0.667:1 ratio (33% over driven).

The 6L80 had a fairly short life span, having been first but into production in 2006 and eventually being pulled from production in 2012. This transmission could be found in many heavy duty and performance based vehicles, including the Cadillac XLR-V, the Cadillac STS-V, the GMC Yukon Denali, the Hummer H2, the Chevrolet Camaro and the Chevy Corvette. It could also be found in the Pontiac G8.

The Pontiac G8 came wih the 6L80 transmission.

Source: worldcarfans.com

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Towing Accessories For The TH400 Transmission In Your 1976 C10 Pickup

Posted by on Friday, January 9th, 2015

The TH400 is a three-speed automatic transmission built by General Motors. It was built alongside both the weaker Powerglide two-speed transmission and the TH350 three-speed transmission. The TH400 was deigned to be used in heavy vehicles, trucks, vans and high performance muscle cars. By modern automatic transmission standards the TH400 is very crude, using a 2.48:1 first gear ratio and a 1:1 final gear ratio. This transmission does not use any electronics (expect for the neutral safety switch), has no lockup torque converter and no overdrive gear. Regardless, the transmission remains popular today, especially in restored muscle cars and trucks that are still on the road. The TH400 could be found in a vast array of GM vehicles, including the Oldsmobile 442, the Pontiac GTO, the Chevrolet Chevelle SS, the Corvette, the Chevy Nova, the Cadillac Eldorado, the Pontiac Firebird and the Chevrolet Blazer. It could also be found in the C/K pickup truck.

The C/K pickup truc kcame with the TH400 transmission

Source: cardomain.com

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Automatic vs Manual Transmission: Which is Better for Long-Distance Road Trips?

Posted by on Monday, January 5th, 2015

An automatic transmission is an integral part of your car. Image source: Wikimedia Commons

When going on a long road trip, make sure that you choose the RIGHT type of transmission.
Image source: Wikimedia Commons

For many people, road trips are a source of fun and entertainment. For others, they’re a necessity. Either way, when making road trips that consist of several hundred to several thousand miles, you need to make sure that your vehicle is equipped with the right transmission. It comes down to the age-old automatic vs manual transmission debate. Are automatic transmissions really better for long-distance road trips compared to manual transmissions? That’s what we’re going to answer in this post.

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An Inside Look: Understanding the Future of Electronically-Controlled Automatics

Posted by on Friday, December 26th, 2014

Learn about the wonderful advantages of electronically controlled automatics and how they work. Image source: Wikimedia Commons

Learn about the wonderful advantages of electronically controlled automatics and how they work. Image source: Wikimedia Commons

Electronically controlled automatics are becoming more and more popular, especially on newer cars. They still utilize hydraulics to activate the bands and clutches, but the crucial difference is that each individual hydraulic circuit is operated by an electric solenoid. What is the benefit to this? The main advantage is that it helps simplify the plumbing on the transmission thus, allowing for more advanced control setups.

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Upgrading The Performance Of the 4L80E In Your Chevrolet Avalanche Is Easy

Posted by on Thursday, December 25th, 2014

The 4L80E is a very heavy duty four speed automatic transmission designed and built by General Motors. It comes from a family of transmissions that include the 4L85E. Both are heavily based on the original heavy duty Th400 three speed automatic transmission.  For an automatic overdrive transmission, the 4L80E does not feature a very aggressive first gear ratio, only coming in at 2.48:1.  The same can be said for the overdrive gear – it is weak.  It comes in at a ratio of 0.75:1 (25% over driven). This transmission is fully electronic, and uses a variety of sensors and electrical solenoids to control the shifting characteristics of the transmission.

Designed to handle up to 440 Ft-lbs of torque, this transmission is usually found in heavy duty trucks and cars that are heavy in their overall weight. This transmission can be found in many GM vehicles, including the Suburban, the GMC Yukon, the Hummer H1 and the GMC Savana full size van. In addition, it can be found in many non GM vehicles, including the Jaguar XJR, the Jaguar XJ12, the Bentley Eight and the Rolls-Royce Silver Spirit. It can also be found in the Chevrolet Avalanche.

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Add Some Performance To The 700R4 Transmission In Your 1986 Pontiac Trans Am

Posted by on Wednesday, December 24th, 2014

The 700R4 is one of General Motors very first automatic overdrive transmissions. It has four forward gears and is heavily based on the earlier TH 350 three speed transmission. For the most part the 700R4 is a non-electronic transmission, with the exception being the lockup torque converter. The 700R4 comes from a family of automatic transmissions that includes the 4L60, the 4L60E, the 4L65E and the 4L70E, all of which are fully electronic except for the 4L60. The 700R5 automatic transmission come with a very step 3:059: first gear ration which is excellent for off-the-line performance. In addition, it also comes with an overdrive ratio of 0.696:1  (30% over driven) fourth gear which contributes to much better gas mileage.

Very early 700R4 where problematic, with many of them failing within the GM warranty period. Over the years, changes were made to address the short coming and the transmission ended up being pretty reliable. The 700R4 was used widely across the GM platform and could be found in vehicles like the Chevy Camaro, the Chevy Impala, the Corvette, the S-10 Blazer, the Suburban, the full size Chevy van and the GMC Jimmy. It could also be found in the 1985 Pontiac Tran Am.

The 1986 Trans Am came equipped with the 700R4 Transmission

Source: goingfaster.com

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