Thread: 727 Torque Flite Auto shift

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Hello All,
Put new fluids and lubed up the 73 Plymouth Duster for a test run,but its been so long since i drove it. Cant go anyfaster than 60mph because of steering ajustments that need to be made. I can't feel or see 3rd gear. Some are saying 3rd gear wont kick in till 70-75mph. I can't remember.

V8,727 Torque Flite Auto trans:

Thanks

It should kick in before that, atleast it did in my 71 Dodge charger.
I was thinking 45 - 50. Is the Vacuum modulater good on the side of the trany.
It's got the vacuum line that runs in to it, you may want to replace it if it's been sitting a long time. They are pretty cheap make sure the vacuum line ain't broke or cracked or even pulled off that can mess up the shifting too.
Kurt

The transmission should shift into third at 30-35 MPH under light throttle presssure.

There is no vacuum modulator on the Torqueflights the shift points are controlled by the kickdown linkage. You might try manually shifting thru the gears and see if whether it will shift that way.

.The 727 Torqueflite is a three speed automatic transmission manufactured by Chrysler in the 1960's. Installing a 727 is a simple but critical process. The installation follows a simple step by step procedure, but can often end up being much more complicated due to the old age of the transmission and the vehicles it was originally installed on. It is generally advised that only someone with previous mechanical experience attempt the installation.

Difficulty:ModerateInstructions
things you'll need:
Complete set of US and Metric wrenches and sockets
Torque wrench
Transmission fluid
1
Maneuver the transmission into place against the back of the engine, while simultaneously mating the torque converter and crankshaft output shaft. Install and torque the bellhousing to engine bolts to 30 foot pounds.

2
Align the torque converter and flywheel. Install and torque the converter to flywheel bolts to 46 foot pounds.

3
Position the transmission crossmember along the underside of the transmission. Install and torque the crossmember bolts and rear mount bolts to 36 foot pounds.

4
Install the transmission shift linkage and oil cooler lines along the right side of the transmission. Tighten the cooler line nuts with a flare nut wrench to avoid damage to the lines.

5
Attach the vacuum line to rubber nipple on the vacuum modulator. Attach the speedometer cable using the integral nut on the end.

6
Slide the driveshaft input shaft into the rear of the transmission and tighten the four retaining bolts.

7
Add nine quarts of new transmission fluid.

Looks like there is a Modulator to me, This is off a 727 Torque flight site. You had me second guessing my self Mike!!! Kurt
.

Kurt, not sure how much credence I would put in that site. The aluminum torqueflight was introduced in 1962 and continued production thru the 80s (the article would lead one to believe it was dropped after the 60's). There were actually 2 versions produced the HD 727 and the lighter duty 904 (and variants) generally used behind low HP small blocks and 6 Cyl cars).

Also every TF I've ever seen has the shift linkage and cooler lines on the left side of the transmission. Additionally you aren't going to get 9 quarts of transmission fluid into it without the enigne running (if memory serves correctly the 727 holds 10-12 quarts total).

I also don't seem to recall an instance where I needed to use any metric wrenches to R&R a Torqueflight even in the 80's (it looks to me like someone pulled a generic transmission installation instruction sheet from somewhere and copied it without proof reading).



You might want to look at the note at the bottom of this Car Craft MOPAR transmission ID chart:


"..Mopar Automatic Transmission Guide
This list is not conclusive or absolute, but provides general guidelines with respect to power ratings.


Trans Year..........Small-Block.....................Big-Block Stock Modified

................. 904/998/999 '60 X -- D B.............. 727 '62 X X A A

......................500 '88 X -- C C ......................518/618 '90 X -- A A

Note: In place of a vacuum modulator, Chrysler automatic transmissions use a rod or a cable to control throttle pressure and kickdown. ....."



As far as second guessing ones self, yeah I went out to the shed and checked (I happen to have 4 variants of them on the shelf).....no modulators to even include the early push button/trunion joint one. I'd take a picture, but it's hard to take one of something that's not there

My 72+ AMC engines have the 727 and I know the kickdown was controlled by a rod and all of the linkages were on the left side of the tranny. As far as the vacuum modulator goes, one of my AMC's had one of them as well but could have been the 6 banger or the Borg Warner.

There is an alignment hole on the kickdown rod bracket at the back of the block which I believe takes a 3/16 pin or drill bit to set the kick down linkage, just loosen the adjuter, slip the pin in and adjust.

Ya I remember the linkage up by the carb. It used a bolt that threaded in to the rod on top of the rod was a flat piece of metal with a slid slot to adjust the kick down.
If it was not adjusted right it would not kick down at all.
I could swear there was a vacuum line. though my trany was worked over pretty well.
I had the 440 magnum with the 727 and a Dana 60 with 410 gear and posi.
I installed the Dana 60 after I twisted the yoke out of the front of the other one when it hooked up on dry pavement with them N50 tires. When that thing realy hooked it either went or you would see parts flying. HE! HE! HE!

Found this on a web site: (not sure that i can put the link here)
1960 automatic transmission tuning :"TorqueFlite (V8)"/ TorqueFlite (I-6)/ PowerFlite
Light throttle 1-2 shifts starting from... 10 mph / 9 mph / 11 mph
Light throttle 2-3 shifts starting from... 15 mph / 14 mph / No 3rd gear
Heavy throttle 1-2 shifts 40 mph / 23 mph / 55 mph
Heavy throttle 2-3 shifts 75 mph / 60 mph / No 3rd gear
Kickdown, 2-1, if speed is less than: 25 mph / 22 mph / 50 mph
Kickdown, 3-2, if speed is less than: 65 mph / 60 mph
Low gear button operates at (maximum): 25 mph / 22 mph / 50 mph


Am I seeing that it says heavy throttle 75mph? <----Is that right?

The legendary torqueflite automatic transmission


This Link says 3rd gear kicks in at 75mph. <-----At heavy throttle...

Gona test drive again soon.