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Old 05-27-2011, 08:36 PM
NeedForSpeed NeedForSpeed is offline
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Join Date: Apr 2004
Location: SoCal / Texas
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Re: ECU tune Transmission control unit?

Quote:
Originally Posted by James Scott View Post
Wat is TC Lock? Like OD?

Wish I understood.. Hmmm?
Jim,

The transmission is a 4EAT, four speed electronic automatic transmission. The gear ratios are 2.785, 1.545, 1.0, 0.694. Fourth gear, less than 1.0, is an "overdrive" gear. It could be said that the SVX has a three speed with an overdrive 4th gear.

You also have a locking 'TC' torque converter. The Subaru 4EAT is programmed to lock the torque converter in fourth gear. When the torque converter locks, the rpm will drop about 200 rpm. You can feel the lock, and you can see the rpm drop on the tach. It feels like a shift
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