1965 C servo

[428kid]

Comes just as pictured, C servo , C5TP 7DO27 A. Asking Sold shipped to lower 48 states. I know this shows me as a newbie but I haven't posted much since the crash. Thanks

[morsel]

PM sent.

Thanks,

Jason

[gt350hr]

428kid is FAR from a newbie and a well trusted seller. I have dealt with him back and forth with excellent results everytime.
     Randy

[65fastbackk]

Hi,

Whats the difference in application between the "Skinny C" and this thicker one?  Was it just production date related?

Thx

[6s1640]

The difference between the fat "C" and skinny "C" includes a part number difference C5 VS. C6.  My guess is it might have been a vendor change near the end of 1965.  Also, IIRC, the flange on the skinny C cover is slightly thicker, possible to stiffen, prevent warping and improved the sealing against the main tranny housing.  Functionally they should be identical.

The "C" servo piston has a 3.13 inch diameter over the "A" servo with 2.84 inch diameter.  The larger piston can hold a slightly higher force at the same pressure within the tranny.  It exerts more holding force on the intermediate band, delaying the automatic shift.  It was original designed for the Ford truck, more holding power in a lower gear with a load.

Cory

[65fastbackk]

Thanks Cory,

So did the 66 gt350's get either one or just the skinny ones.  Could these be found on 65/66 ford automatic trucks?

[TLea]

 Search is your friend as of this is been talked about a lot lately but in lieu of that a simple answer would be prior to January 66 it probably had the fat C and from January 66 on should have the skinny C

[428kid]

Randy thanks for the kind words. In case anyone didn't know Randy either he is a also a top notch guy. Always willing to help a guy out on info or help a friend out he is always there. Thanks also to any of these other guys that have helped on this forum and many others!

[6s1640]

Thanks Cory,

So did the 66 gt350's get either one or just the skinny ones.  Could these be found on 65/66 ford automatic trucks?

Hi 65Fastbackk,

It was only the 65-66 Ford F100 and F250 trucks with the straight 6 300CID engine with Cruise-O-Matic C4 that got the "C" servo.  The same trucks with the 240 CID did not.  The Ford MPC shows only one set of service part numbers for both years, piston C5AZ-7D002-C and cover C5AZ-7D027-B, not to be confused with the casting numbers on the parts.  They are not the same.  Below is the images out of the Ford MPC for truck.

Remember in the both types of part number casting and service part:

Third character "A" = Galaxie and "T" = Truck
Forth character "Z"= Service part and "P" = Auto Transmission

The original casting shows "TP" for Truck Auto Transmission
The service part number "AZ" for Galaxie Service part.

https://classicmustang.com/decoding-part-numbers/

If the Ford service parts were ordered, you could get either the C5 or C6 casting part numbers.  They were considered functional identical.

Mr. TLea captureed your answer very well in reply No. 6 for your question "So did the 66 gt350's get either one or just the skinny ones?"

Enjoy

Cory

[TLea]

 I would say that a January 66 car could go either way.

[gt350hr]

   Cory,
     It was also known as the "taxi cab servo"  in the transmission rebuilder's circles.  Out here in California a taxi was good for about a year and a half with the original purchasing company. After that they often went to a secondary company and by 4 or 5 years were scrapped ( high mileage and falling apart) or sold to the public. Forty years ago I went on a mission to find a used one at any of the Southern California core suppliers and there were none to be found . I bought three right from Ford and all were the C6TP version ( service part)
   My experience on the changeover date is the same as Tim's and YES the revised part is thicker in the flange to curb flex related cracking caused by higher line pressure in the "K" code transmission.
  Randy

[6s1640]

   Cory,
     It was also known as the "taxi cab servo"  in the transmission rebuilder's circles.  Out here in California a taxi was good for about a year and a half with the original purchasing company. After that they often went to a secondary company and by 4 or 5 years were scrapped ( high mileage and falling apart) or sold to the public. Forty years ago I went on a mission to find a used one at any of the Southern California core suppliers and there were none to be found . I bought three right from Ford and all were the C6TP version ( service part)
   My experience on the changeover date is the same as Tim's and YES the revised part is thicker in the flange to curb flex related cracking caused by higher line pressure in the "K" code transmission.
  Randy

Hi Randy,

Yes, taxi and even police.  But try to find one of these cars to get a "C" servo for cheep.  I recalling checking the Ford MPC for Galaxie, Fairlaes, Mustang etc. and seeing taxi and police cars.

Cory

[morsel]

Comes just as pictured, C servo , C5TP 7DO27 A. Asking Sold shipped to lower 48 states. I know this shows me as a newbie but I haven't posted much since the crash. Thanks

Super happy with this purchase, 428kid was super responsive and communicated at every step of the way, and shipped the item super quick, already have it.

If he's selling anything else, he's a great seller and can be trusted.

So happy to check this one off my list, parts in great shape.

Thanks again 428kid for selling it.

Jason

[Duncan66]

you lucky dog, you beat me to it...the quest goes on...though I need the 66' thin "C"....it seems....june '66 assembly date....

[gt350hr]

    It should certainly be the C6TP lettered version.
       Randy