Please read the AT-Bible
and Torque Converters Explained
OK, it may
not have bible status, but John from ITP posted this great write-up on DSMtalk.
It is a must read.
There is also some good info here PlymouthLaser.com
ATRA (Automatic Transmission Rebuilders Association) is another helpful site
Here are links to pages that I created:
Translab Shift Kit install
End Clutch Repair
Other Transmission Seals to Replace
DSM TCU Part Numbers
In recent years, it has become more affordable and easier to find information regarding Import transaxle performance. Owning an automatic is no longer a hopeless situation.
Many argue that automatic transmissions loose too much power from drivetrain loss compared to a 5-speed. When you do the numbers, automatics generally weigh 50# more and loose 5% more power than a 5-speed (very generalized.) This 5% works out to be a 20 horsepower loss at 400hp. I feel that more consistent track times is worth the 20hp loss and I can just raise the boost .5psi to make up for it.
First, the B&M Trick Shift was the most recommended automatic transmission fluid. Then John from IPT says it is terrible. Since he works on transmissions for a living, I trust his word. Go with OEM or a good synthetic like Amsoil or Redline. Be careful who you listen to for automatic transaxle information.
IPT recommends adding a bottle of LubeGard to ATF fluids that are not OEM. This will help make the ATF closer to the OEM Mitsubishi fluid.
The two most popular upgrades are Trans Lab shift kits and end clutch upgrades. Both run around $80 each + labor if any from Import Performance Transmissions.
I highly recommend adding a transmission cooler or installing a larger one for most applications. Heat is the primary killer of all automatic transmissions.
Also, I picked up a magnetic drain plug from MagneticDrainplugs.com and a new transmission filter kit from the Hyundai dealer. Better safe than sorry. It is amazing how much debris floats around in there from normal use.
Either Hyundai used the KM175 transmission case for some KM177's or this transmission has had some work in the first 70,000 miles. I recently found out that it is common to find a lower transmission marking on the case since they are interchangable. Check the End Clutch cover to see if the true model marking is there.
Your two main options:
--> 5-speed swap and a performance clutch.
2. Beef up the automatic and install a BIG transmission cooler.
These guys can help you - full tech support for performance automatic transmission parts:
Import Performance Transmissions
Great Prices on standard transmission parts - little support:
Makco Distributing, Inc
Give your local Alto Red Eagle distributor a call for the friction parts.
Just pick a region in the US.
Borg Warner also makes decent frictions
1995 Eclipse GSX Auto with over 500hp
Custom high-quality torque converters
FWD Automatic Transmission Links
The DSM Automatic Transmission website
Club DSM A/T
Mitsubishi Automatic Transmission rebuild manual Courtesy of Manual CD's
PDF of Auto Trans Manual
A few other manuals that are available
Manual CD's free Manuals