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1. Allison 5 Speed Automatic
2. 5 Speed Automatic Transmission For Sale
3. Fastest Automatic Transmission Cars
4. 5 Speed Automatic
5. 5 Speed Automatic Meaning

There are two basic Ford 4-Speed automatics: The light duty AOD/4R70 found mainly in half ton or lower applications, and the heavy duty E40D/4R100 in the heavy 1/2 plus all 3/4 and 1 ton trucks and motorhomes. These transmissions have a low first gear which is good for initial take off but this makes the transmission have very wide ratio changes. The intention by the designers was the best possible EPA mileage ratings, not performance.

The GEAR VENDORS will give you Gear-Splitting to fix those wide ratios with a gear between each of them when you want it for tremendous gains in performance (see Final Drive Ratios). Whether you are accelerating with a Supercharged sport truck or climbing a hill with a heavy load in tow behind your diesel – gear-splitting = performance.

The W5A580 is the 5-speed automatic transmission of choice for Wranglers running from 2012-2017. This is a medium duty transmission with five forward gears including one overdrive gear. Complete Overdrive Solutions Engineered to Increase Fuel Mileage, Decrease Wear & Tear and Improve Driving Pleasure. Modern Driveline specializes in Tremec T5, TKO, T56 Magnum manual 5 & 6 Speed overdrive transmissions and related installation components for ALL major Manufacturers as well as Hot-Rods, Kit Cars, Customs and Trucks.

GearSplitting is the feature that allows the UNDER/OVERDRIVE™ to shift between the gears. When you want power you will now have approximately 1/2 the drop of engine rpm from one gear to the next. By keeping torque multiplication higher and engine rpm narrower you increase engine performance by typically more than 40hp and 60lb ft. of torque without any modification to the engine (see Horsepower and Torque curves) (see also, Common Questions on performance modifications).

This is why big trucks (Kenworths etc.) use gears (most 18 wheelers have 10 to 15 gears) instead of the other modifications, because gearing gives them performance which actually improves the reliability of the engine. The heavier you are loaded, the more you need a GEAR VENDORS.

Fuel Economy: Besides giving you 8 gears and lots of performance the Gear Vendors Under/Overdrive is the most effective way to improve fuel mileage on vehicles running a 3.73 or higher numerical rear gear (ie 4.10, 4.88). Expect 20% increases during highway cruising with any rear gear in the 4’s and 10-15% with a 3.73 with any big block engine gas or diesel. Small block V8 engines (4.6, 5.0, 5.4) do not have the bottom end torque to push the trucks aerodynamics in double overdrive so on the small blocks your factory gear should be good (with the exception of the supercharged small blocks).

Look at the Final Drive Ratios and notice that you will now have 3 different ratios of overdrive. Double overdrive for when running empty with your truck (no towed load), factory overdrive for in-town 60mph runs, and a .78 overdrive ratio for when towing that will give you more torque multiplication and cooler transmission temperatures (extending the life of your transmission) without any cost to fuel mileage.

If you have a rear end of 4.10 or greater and commonly drive the truck without a load, the Gear Vendors is going to pay for itself very quickly and bring a lot of enjoyment to driving the truck with lower engine noise better fuel mileage and of course the performance aspects of gear-splitting always available.

If you already have engine modifications (chips, exhaust, fuel increases, etc.) the GEAR VENDORS will let you get the most from them by working in narrower rpm ranges where the horsepower is. Also, by adding torque multiplication the GEAR VENDORS makes it easier for the engine and transmission to propel the vehicle.

On the 5 speed 5R110w you will notice virtually all the same benefits as the 4 speeds but two are most important – Double overdrive when running empty for fuel economy identical to the 4speeds comments above, and 3rd-over which when towing and climbing grades is invaluable a it is 28% faster than 3rd but 20% more torque multiplication than 4th (equivalent to putting a 4.89 rear instead of your 4.10).

The GEAR VENDORS comes with a 2 Year unlimited mileage warranty (1yr if you have a commercial truck – see Commercial section) and a 30 day money back guarantee so you know you will be happy with everything about how this unit installs and drives (see Warranty for details). The GEAR VENDORS is the only aftermarket performance device or auxiliary transmission to come as original factory equipment on new cars, trucks, vans and motorhomes.

With fuel prices what they are today, there is just no good reason not to own a Gear Vendors Under/Overdrive. Call us and we will answer any questions and gladly arrange for purchase and installation at your authorized local dealer of your preferred mechanic.

Find your transmission and rear gear multiplier below. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. This Final Drive number is also your torque multiplier when in that gear. GEAR VENDORS reputation for being the best is because of its sophisticated planetary construction. This means GEAR VENDORS is the only auxiliary intended as a GearSplitter behind automatics and the nicest to work behind both automatics and manuals. You are able to shift half gears that keep the engine in the power. Any auxiliary that requires you to lift off the accelerator or is not intended to shift frequently is not going to give you this performance.

There is not room here to cover all the details so call the factory to discuss the full benefits demonstrated on these charts.

Call or e-mail the factory to find out all the options available in your performance application, 1-800-999-9555.

Allison 1000 Transmission Features

Moderate changes have occurred to the transmission throughout the years however the platform itself has, for all intents and purposes, remained the same since 2001. The most notable modification has been the transition from a five to six speed model, which lowered cruising rpm by roughly 14% in high gear. This addition is particular attractive in terms of fuel consumption, as the lower engine speeds create an opportunity for greatly improved fuel economy on the highway. Rather than becoming outdated, the Allison has evolved to match the performance characteristics and demands of the Duramax turbodiesel, which has undergone significant changes itself through the years.

Manual transmissions are relatively rare for Duramax powered GMC/Chevrolet pickups, the primary reason being the attractiveness of the Allison 1000. General Motors was the first of the 'Big 3' to phase out a manual transmission option for their diesel - the ZF 6 speed was last offered for the 2006 model year. Modern automatic transmissions, such as the Allison 1000, are far superior to manual transmissions in almost every category. While a manual transmission is obviously a much simpler machine, there can be no integration between engine parameters and transmission shift schedule; such communication between powertrain components brings us innovative features that include engine braking and dynamic shift schedules. Additionally, the Allison 1000 is rated with a far greater input torque capacity than any outgoing manual transmission.

The Allison's external filter eliminates the need to frequently service the internal filter and greatly reduces maintenance time/cost. It also relies on adaptive technology which integrates the transmission with the engine control module to continuously monitor driver input and calculate ideal shift strategies for the particular driving conditions.

Allison 1000 Ratios

Allison 5 Speed Automatic

* 6th gear available in 2006+ model years.

5 Speed Automatic Transmission For Sale

Allison 1000 Specs

Fastest Automatic Transmission Cars

Allison 1000 Strengths & Weaknesses

The Allison's obvious strength is its robust size, as the 1000 series transmission is designated for medium duty applications. Intuitively, this demonstrates that the transmission is inherently sufficient for class 3 and 4 GMC/Chevrolet pickups. The six speed model also has dual overdrives, with the second overdrive ratio being rather high. This allows for low engine speeds at cruising rpm and ultimately opportunities for significantly reduced fuel consumption in relative terms.

The Allison is not without a few weaknesses, which include insufficient lubrication to the C3 clutch and the off-center engagement of the C1 and C2 clutches. Low fluid flow to the C3 clutch has been known to be a leading cause of premature failure in the Allison, although it's not generally a cause for concern and there exists no phenomenon of widespread failures as a result of this issue. The C1 and C2 clutch pistons engage their respective clutch systems from the side (off-center), which typically causes uneven wear on these clutch packs. Again, the problem is frequently noted during transmission rebuilds, but has not been largely attributed to premature transmission failure.

5 Speed Automatic

5 Speed Automatic Meaning

A common occurrence for Duramax owners who chose to install aftermarket tuners/programmers (for performance improvements) is experiencing the transmission's 'limp mode'. This is a safety feature built into the Allison's programming which locks the transmission in 3rd gear if rapid or excessive slippage is detected. The concept is to protect the owner from being stranded as the result of serious transmissions problems, as the system identifies the slippage as abnormal and possibly a sign of severe problems. When this occurs, owners will experience a significant decrease in engine performance and reduced vehicle speed (performance and ratio limited).