Transmission & Drivetrain Gearboxes, Differentials, Clutches

Poor shift quality

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Old Jun 2, 2011 | 06:50 PM
  #1  
t4wrench's Avatar
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Default Poor shift quality

I own a 92 Accord w/ a 4cyl automatic. There are several shift quality issues that I hope are related. There is a delayed 1-2 shift a lower speeds. It seems to hang in first gear and requires steeper throttle angle to "force" the shift. This almost always occurs in parking lots under 10 mph. When it does grab 2nd it is harsh. There is also harsh 3-4 shift between 30 to 35 mph at light throttle. It is better when it is cold for both issues. I was wondering if a VSS signal could be a problem, but the speedometer is always smooth and steady. There is no check eng light. I know these transaxles are fully electronic. Will they set codes for shift quality issues? Could anyone recommend what I should test? I am more knowledgeable w/ non electronic systems and would be inclined to think the governor was sticking. The condition does not seem to be getting worse and the fluid level and quality is fine. What should I test?
I just noticed a common factor under both conditions. The throttle angle is about the same in both cases. Could a TPS reading cause this?
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Old Jun 5, 2011 | 07:47 AM
  #2  
David @ Synchrotech's Avatar
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Default Re: Poor shift quality

The 1992 Accord automatic tranmission uses a TV cable connected to an arm on the side of the transmission to increase or decrease pump pressure. If the cable is ourt of adjustment or binding, it will cause shift issues like you have described.

Throttle Cable Synchronization


On Honda Transmissions with a throttle valve cable “T.V. Cable”, it is important to synchronize the throttle cable and T.V. cable before the final adjustment or “Fine Tuning” is done. Cables that are out of sync can cause a variety of shifting problems because of the imbalance of pump pressure to throttle position.

Synchronize cables by first checking the throttle cable adjustment. Remove all of the slack, but DO NOT let the throttle plate come off of the stop. Then, remove all of the slack from the T.V. cable and adjust until the T.V. arm starts to lift. At this point, you are ready to fine tune the T.V. cable adjustment. Tightening the cable will increase pressure and extend shift points. Loosening the cable will decrease pressure and allow earlier shift points. If the cable is too loose the clutches may slip causing premature transmission failure.
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