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Old 03-26-2011, 01:29 PM
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1977 727 tranny shifting too soon

I just bought this 1977 Plymouth Voyager van which has been sitting under a tree for several years. I've got it up and running fine but the transmission shifts to 2nd just after takeoff (~10mph) and to 3rd ~20mph. I'm thinking this is caused by worn out or broken governor springs but I'm no dodge tranny expert. Could it be throttle linkage adjustment or something else?
Although the fluid looks good and has no burnt smell I do plan to change the strainer/pan gasket soon. I'd like to correct this early shift issue at that time.
Thanks for any suggestions/directions.
Mike

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Old 03-26-2011, 02:04 PM
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the governor of the 727 is not remotely designed like a GM governor you may think of for springs and weights.

throttle linkage on the 727 is very important for shift timing. Needs to move the lever towards back of car as throttle is pushed
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Old 03-26-2011, 02:23 PM
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Thanks Crosley. I'll make an adjustment after the rain stops here and post back with results.
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Old 03-26-2011, 03:12 PM
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Quote:
Originally Posted by mike 96 ws6
Thanks Crosley. I'll make an adjustment after the rain stops here and post back with results.

the lever I was speaking of is the lever at the trans. Shift link is under the TV lever as it sits on the trans.

The TV lever at the trans moves backwards to increase pressure
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Old 03-26-2011, 03:42 PM
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Quote:
Originally Posted by Crosley
the lever I was speaking of is the lever at the trans. Shift link is under the TV lever as it sits on the trans.

The TV lever at the trans moves backwards to increase pressure
Okay. If I remember (been years since I fooled with a 727), that lever attaches to the vertical shaft with a bolt that squeezes/clamps the lever to the shaft rather than a spline, correct? And if so, I'll need to loosen the bolt then slightly turn the shaft counterclockwise (viewing from top). Then tighten bolt in that position and roadtest. Correct?
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Old 03-26-2011, 07:16 PM
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Quote:
Originally Posted by mike 96 ws6
Okay. If I remember (been years since I fooled with a 727), that lever attaches to the vertical shaft with a bolt that squeezes/clamps the lever to the shaft rather than a spline, correct? And if so, I'll need to loosen the bolt then slightly turn the shaft counterclockwise (viewing from top). Then tighten bolt in that position and roadtest. Correct?
the lever doesnt turn on the shaft. it is notched like a 1/2 moon. the long rod that goes from the carb/throttle body down to that lever should have a bolt retained slider for adjustment. in order to increase line pressure, the slider needs to be closer to the end of the rod. maybe not much, say an 1/8th inch to start as your shift points arent all that short. a 1/2" wrench is all you need. gl
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Old 03-26-2011, 08:42 PM
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Quote:
Originally Posted by tnsmith10
the lever doesnt turn on the shaft. it is notched like a 1/2 moon. the long rod that goes from the carb/throttle body down to that lever should have a bolt retained slider for adjustment. in order to increase line pressure, the slider needs to be closer to the end of the rod. maybe not much, say an 1/8th inch to start as your shift points arent all that short. a 1/2" wrench is all you need. gl
Ah, I now remember the slider adjustment at the carb. Good, that will be easier to do. Leave it to me to first try it the hard way.
My dad always told me, "when all else fails - read the directions".
Thanks for the directions, both of you.
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Old 03-29-2011, 07:50 PM
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Got it adjusted fine now by extending the rod length about 3/8". i drove it ~200 miles today, on the interstate at 70 mph and around Memphis streets. It did just fine other than leaking power steering from the steering box output shaft seal, but that's another thread.
Thanks a ton to you both!!!
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