Compact Automat

There is probably a transmission shop in almost every city in the country that can build a bulletproof transmission for American manufactured vehicles. If is a late model Mustang or 60, Chevelle, there are plenty of aftermarket components and many years of available technology for the transmission rebuilder to use.

The same can not be said of 4EAT automatic transmissions for Subaru vehicles. In factory form, these transmissions show several problems that can cause failure at only 20,000 miles with a stock engine and even earlier in the requests for amendments.

Poor shift quality, the components of plant anemia, and, especially, torque converters plague incorrectly configured vehicle with automatic transmission. This is connected with the automatic tendency to burn the clutch pack height (third gear) and 2-4 clutches (second and fourth gear) with a moderate increase in the engine power.

Realizing the need for import and sport compact machines to their full potential, IPT Performance Transmissions a company based in New Jersey, made much of his research time and dollars toward improving the Subaru automatic transmission.

First up on the hit parade of internal modifications is the need to address the issue of calibration of the valve body. The valve body mods are really the basis of any performance trans rebuild. An automatic transmission uses a network of valves, servos, solenoids, orifices, accumulators and passages that control and route hydraulic pressure to the right places to apply the clutches and bands.

Without going into elaborate detail that would fall outside the scope Application of this article, suffice it to say that changing the valve body effectively changing the application rate and clutch increases the clamping force with which these components have to work. This is why change and modification kits, valve bodies that produce the company change type of performance that increases total capacity to handle the transmission of power.

Then all critical support bushings must be replaced to ensure that the centerline of the transmission runs in perfect alignment with the centerline of the crankshaft. Ignoring this step puts a lot of tension excessive in the internal transmission components.

Many of the other parties too, like the pinion shaft, the Front of the differential and ring gear planetary gearbox undergo various metallurgical processes such as heat treatment, Meta-Lax to relieve stress, and cryogenic treatment (freezing in liquid nitrogen at -300 degrees Fahrenheit to 'reset' the structure of the piece at the molecular level).

Finally, all the necessary stamps and gaskets are changed to the materials that are better able to cope with the heat and stress that is common in high power applications. Clutches and Performance steel reaction plates are installed and their permissions set in the most demanding specifications that are used by the factory. More importantly, IPT uses a patented six-pack of clutch plates high and five-disc clutch pack that increases the 2.4 second, third and fourth pair of gear capacity by over 25% front of the factory set-this is the key to getting a high-powered vehicle to a 1-2, 2-3, and 3-4 shift instead of bouncing on the rev limiter.

As for the changes outside the gearbox, the next step of importance is, of course, the torque converter. In an automatic equipped vehicle, one of the most important components throughout the car in terms of optimizing performance converter is configured correctly.

Apart from being made hard many improvements over the original part, a converter of performance allows a vehicle to better leverage the speed range in which maximum power is made. In simple terms, a properly designed converter will allow a vehicle to launch under more power by increasing the number of revolutions in the The launch takes place. Essentially, a torque converter is an infinitely variable transmission itself and changing its multiplying torque characteristics other variables is necessary if the vehicle was changed (turbos more and more cameras).

Even in the otherwise stock turbo vehicles Subaru, a reduction of more than an hour was the second not at all uncommon with the addition of a converter configured correctly.

Transmission torque converter and valve body upgrades are not just for American made vehicles more. The increase in performance, durability and more efficient displacement is now available for vehicles of almost every manufacturer thanks in part to the few companies that are willing to do research work and development needed for this rapidly growing segment of the automotive aftermarket.

About the Author:

John Lombardo is owner of IPT Performance Transmissions and has been in the high performance industry for over 20 years

Article Source: ArticlesBase.com – Subaru Performance Automatic Transmission Upgrades

Compact Automat

Compact Automat