Torque Converter behavior question
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Torque Converter behavior question
I had a new (heavy duty) torque converter put in the V-10 Ex a few months ago. It goes into lockup when it should, but coming out of lockup seems odd.
When I come off the gas, after 1 - 1.5 seconds the lockup releases, but the engline slows only 400 - 500 PRM. The motor acts as a brake, slowing the Ex until the RPM nears 1,000.
I would think that she should coast, or very nearly coast, with no drag from the motor.
Or am I confused?
When I come off the gas, after 1 - 1.5 seconds the lockup releases, but the engline slows only 400 - 500 PRM. The motor acts as a brake, slowing the Ex until the RPM nears 1,000.
I would think that she should coast, or very nearly coast, with no drag from the motor.
Or am I confused?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
You're confused. The torque converter should provide engine braking whether it is locked or not. It is unlocking when you come off the gas. The additional braking you are feeling is the fuel shutting off.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
There is always a drag when you let off on the gas with any tranny at any speed. Years ago they had an overdrive in some sticks that acted like it went into neutral when you let off on the gas but they went out of style before the Hula Hoops came in.
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