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Old 09-07-2007, 10:37 PM
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mopar 727 transmission

I recentely purchased a used 727 torqueflite trans that was rebuilt a year ago. After the car sits 2 or more days I have to bring the rpm up to 1000 to get it to move in drive or reverse!!! .....After I do that 1 time,... it works and shifts Perfectly??? Can anybody out there who works on these Transmissions tell me what is causing this??? The filter is new, plenty of oil, and the shifts are firm and quick........HELPPPPPPPPPPP

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Old 09-07-2007, 11:00 PM
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Quote:
Originally Posted by Mandy-Boy
I recentely purchased a used 727 torqueflite trans that was rebuilt a year ago. After the car sits 2 or more days I have to bring the rpm up to 1000 to get it to move in drive or reverse!!! .....After I do that 1 time,... it works and shifts Perfectly??? Can anybody out there who works on these Transmissions tell me what is causing this??? The filter is new, plenty of oil, and the shifts are firm and quick........HELPPPPPPPPPPP

A stock 727 trans does not fill the converter in park... After the vehicle sits for a few days the converter will drain down.

Start the engine , then place the shifter in neutral for a 30 seconds and the vehicle should move when placed into gear.

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Old 09-08-2007, 09:03 AM
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Tony,
Isn't there a fix for that, a different manual valve or something?
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Old 09-08-2007, 10:49 AM
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Quote:
Originally Posted by jakeshoe
Tony,
Isn't there a fix for that, a different manual valve or something?
yes, TransGo has a custom manual valve for decades. There are a few small mods to the v-body with the valve and it works well.

Back in the 80's here in AZ we often had Dodge vans for carpet cleaning with a burned up mopar 727 trans. The vans sat and idled for power to some of the cleaning systems with the trans in "park" ..... the pumps and converters would melt down from lack of lube flow into the converters.
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Old 09-08-2007, 09:00 PM
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So your saying that all standard 727 torqueflites back in the late 60/s have this problem?? I Just cannot buy that, your talking probably 300,000 cars.there must be another problem ,allthough your answer does sound good,........ Has anybody else out there ever had this problem??? I worked for Dodge from 65 to 71 and I assure you the new cars we sold never had this problem,,,,,,,,,,,,,,
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Old 09-09-2007, 11:27 AM
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Crosley is correct,
This was a common problem on the TF's and that is why there is a "fix" for it in the aftermarket.
It is commonly known in the trans industry. I don't do many Chrysler trans but still remember it.
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Old 09-09-2007, 09:04 PM
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Quote:
Originally Posted by Mandy-Boy
So your saying that all standard 727 torqueflites back in the late 60/s have this problem?? I Just cannot buy that, your talking probably 300,000 cars.there must be another problem ,allthough your answer does sound good,........ Has anybody else out there ever had this problem??? I worked for Dodge from 65 to 71 and I assure you the new cars we sold never had this problem,,,,,,,,,,,,,,
it was a problem in the 60s , 70s and the 80s.... been there done it and got the t-shirt with holes in it.

Problem shows up in mileage on the trans, New cars usually behaved back then when the warrantys were at 36 months/ 36 k miles?

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Old 09-09-2007, 09:43 PM
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TSB's are listed for the 727 on this issue, most are dated in the 1980's.
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Old 09-09-2007, 10:40 PM
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The 904 in my 72 Dart does the same thing as you are describing with the 727. I thought maybe the tranny was going bad, maybe it isn't.
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Old 09-10-2007, 08:49 AM
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mopar 727

Quote from Mandy-Boy-"Has anybody else out there ever had this problem"?

The answer is yes. Anybody that has been in the transmission repair business for any lenth of time is aware of this concern.

As Crosley stated, the Transgo kit is a nice fix for "no converter fill", in park.

Ironically, some of the "tricks" we were doing to make the transmission better, such as drilling the valve body for line to lube, actually made the problem worse.

Any place that the converter can drain down [into the pan ], thru cooler lines, worn bushings, worn splines, etc, or if you drill the valve body, for line to lube, these are all places where the converter can lose it's "charge".

If you still have doubts about what you've read, try this.

Check you trans fluid when the vehicle is warm and running. Note where the level is.

Let your vehicle sit for 2 days, without starting.

After 2 days go out, raise the hood, DO NOT start it yet, pull the stick out, for the trans of course, wipe it off, hold it in your hand.

Then have someone start the vehicle for you. Immediately check the trans fluid level.

If your converter is draining back you will notice that the level will register very high on your dipstick, way over full.

That fluid came from the converter draining back.

When you have this condition patience is a true virtue.












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Old 09-11-2007, 05:00 PM
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uh my 70 polara sits for weeks at a time and i don't have to do that.
oh yeah its stock.
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Old 09-11-2007, 08:24 PM
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Quote:
Originally Posted by redneckhotrodder
uh my 70 polara sits for weeks at a time and i don't have to do that.
oh yeah its stock.
dealer might have fixed that 1. as i said, there are tsbs for that issue, which means dealers knew a fix.
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