727 Question

[Bug'sRT]

I have a 1974 440 backed up with a 727 out of a Monaco police interceptor. It shifts hard under acceleration and deceleration. I believe the trans is stock. Is this normal?

 

[Nate S]

Usually don't see the hard downshift. I did have this once in a '67 300. I don't know what causes that off hand. A stiff upshift under accel isn't terribly surprising.

 

[493 Mike]

Is the throttle pressure linkage adjusted properly? Police calibration may be harsher than passenger car settings.
Mike

 

[wyrmrider]

Normal for a cop car
I'd suggest a transgo TF 2 reprogramming kit next time you change the fluid and adjust the bands
atf+4 works great in non lock up trans
what motor??
large or small converter

 

[Don Frelier]

Does it have cop shocks?

 

[wyrmrider]

good luck finding any Monroe 500 large bodied shocks
what is the best shock these days
I put the shocks outside using some 4 x 4 mounts- longer shocks with more leverage

 

[Dipstick]

I don't think the cop car 727 was any different than an equivalent civilian Monaco.

 

[66Satellite47]

The police 727's typically have different components. A harder shift seems normal. I'd sure like to get one as a core.

 

[WP29440SE]

I have never seen , read or heard of any "cop" 727 being any different than any other 727
...change my mind....

. the TP adjustment will make it shift harder or softer. I experimented with my own transmission finding the shift points I liked.

 

[66Satellite47]

There are more combinations of 727 internal components than I can count. Standard "low perf" are very different than the "HP' versions. Heavy duty applications have various versions also. Many versions of high performance, including "cop" were used.

 

[Cranky]

Wasn't 4 planetary gear sets and an extra clutch a couple of the added items to the HD transmissions?

 

[383man]

I worked at a Dodge dealer for 24 years and did auto trans work. I worked on some police cars and did trans work on them. Most were 318 and 360 cars and I don't remember any shifting real hard. Some may have shifted a tad harder but nothing that was very much. I do remember they had special locking clips on the trans linkage so nothing could fall out real easy. They took a little longer to remove the trans because the locking clips took more time to get off. I also remember they all had special coolant hoses as the rad and heater hoses were all blue a high heat type. But I really don't remember any shifting much harder that was very noticeable. Your car may have to high of throttle pressure so I would make sure its working right and it may even have the line pressure turned up some if its ever been worked on. Does it shift hard into all gears or just second gear ? Ron

 

[66Satellite47]

Wasn't 4 planetary gear sets and an extra clutch a couple of the added items to the HD transmissions?

As far as I know(? LOL), all '68-71 HD 727's had 4 pinion planetary front & rear, 4 disc front clutches (except the Hemi trans wide 5 disc drum & wide front band, 5.0 front servo lever), HD versions also used the 3.8 front servo lever and either 10 or 12 springs in the front clutch. Lower perf versions used a combination of 4 pinion & 3 pinion or 3 & 3 pinion, front servo lever ratios of 3.8, 3.2, 2.8 maybe more(4.2 seemed only used in slant 6, but popular with some HP builders).

 

[66Satellite47]

I worked at a Dodge dealer for 24 years and did auto trans work. I worked on some police cars and did trans work on them. Most were 318 and 360 cars and I don't remember any shifting real hard. Some may have shifted a tad harder but nothing that was very much. I do remember they had special locking clips on the trans linkage so nothing could fall out real easy. They took a little longer to remove the trans because the locking clips took more time to get off. I also remember they all had special coolant hoses as the rad and heater hoses were all blue a high heat type. But I really don't remember any shifting much harder that was very noticeable. Your car may have to high of throttle pressure so I would make sure its working right and it may even have the throttle pressure turned up some if its ever been worked on. Does it shift hard into all gears or just second gear ? Ron

I'm not a Mopar mechanic, just back yard guy, but have had many, many 727's from many years & applications. There are many different combinations of internal parts that 727's have, guess I never noticed the locking clips on linkage, never took a complete one out of a police car only used them as cores. I have taken apart many dozen 727's & know the internal parts vary a lot. That does affect shift quality.

 

[Dipstick]

The factory parts catalogs don't have a listing for "police" transmissions, only HP.

 

[66Satellite47]

OK

 

[wyrmrider]

some years had different trans part numbers for police/taxi even trailer tow
thinkng late 60's early 70's
I do not remember if the individual parts were different , or valve bodies
50 years later does not matter

 

[66Satellite47]

The different applications did have different components. I presume the different applications (std perf, HP, police, taxi, HD towing) had different part numbers that would correspond to the different internal parts combinations. When I collected core 727's I didn't pat attention to the part numbers, just what the clutch drums were, front servo levers, pump style, planetary, etc.

 

[Dipstick]

I've seen a couple of 440 CHP 727's from the seventies and the only difference seemed to be a bracket on the pan bolts that prevented the transmission from being shifted into "1". Otherwise same part number as any C-body HP 727.

 

[383man]

I'm not a Mopar mechanic, just back yard guy, but have had many, many 727's from many years & applications. There are many different combinations of internal parts that 727's have, guess I never noticed the locking clips on linkage, never took a complete one out of a police car only used them as cores. I have taken apart many dozen 727's & know the internal parts vary a lot. That does affect shift quality.

Yes they have had many different parts over the years and I have worked on a ton of them and fixed them for many years. And many had different governors in them that changed the shift points but I don't remember ever driving any stock trans whether a cop car or just stock trans that shifted real hard between shifts unless someone had modified it or it had a problem. We had some that banged into drive or reverse that we had to fix but any trans I found with hard shifting between gears either had a problem or had been modified by someone. I actually had a 4 cylinder Caravan used car that had been traded in and the salesman sent to the shop for hard shifts and I found someone actually modified it by removing the accumulator spring and blocking it. And they also changed the plate in the valve body. I thought why would anyone do that to a 4 cylinder Caravan ??? But with all the different applications of the trans I never saw or heard of a cop car or any Mopar car from the factory made to have hard harsh shifts. Only the factory race cars were modified for harder shifts. Heck most trans changes were for smoother shifts. But many had different shift points depending on the car or truck. And most different internal trans parts that the factory changed or updated do not affect shift quality and cause hard shifts as only valve body and accumulator parts would affect that or turning the line pressure up and modifying throttle pressure. Ron