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Author
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Topic: c4 transmissions
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rockafellz
Gearhead Posts: 138
From: San Lorenzo, CA, USA
Registered: Aug 2001
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posted 09-20-2001 11:27 AM
   
Hey All,Are all C4 transmissions from different years "very" similar? or very different? I saw one for sale for $125 that needs rebuilding. It's from an '84 Mustang GT and I want to mate it with a 289/302. I figure I want to learn how to rebuild engines and trannys and it might be a good learning experience. The seller is stating that he thinks the "converter is blown" and was "slipping" prior to him removing it. What do you guys think of the price and condition of the C4? Thanks again. Regards, Erik p.s. thanks for the tips on engine detailing. It's going pretty good so far. [This message has been edited by rockafellz (edited 09-20-2001).]
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franklin
Gearhead Posts: 128
From: VA
Registered: Nov 2000
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posted 09-20-2001 01:43 PM
In my neck of the woods, that's the going price for a good used trans from the junkyard with a 30 day guarentee. One difference I have found in c4's is around the early 70's they changed the size of the pump shaft(the small center shaft that goes in the torque convertor). You have to get the proper torque convertor for the early(approx 1970 and earlier) and the later trannies. Also, everytime I changed the trans in my 65 with the floor shifter, I had to take the pan off the replacement tranny and transfer the shifter lever from the 65 tranny to the later tranny. Also, I have a 73 tranny in the 65 now, and it came from a Maverick with a 6 cyl. People told me the 6cyl trannies have less clutch pack discs than v8's, and it wouldn't last. That was 12 years ago, and it's running fine behind a MILD 302 with a driver who drives like he has some sense.
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mellowyellow
Gearhead Posts: 4135
From: So. Fl.
Registered: Aug 2000
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posted 09-20-2001 02:22 PM
The guy from MMonthly reccomends the 70 up as a better unit, followed by 67-69.
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franklin
Gearhead Posts: 128
From: VA
Registered: Nov 2000
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posted 09-20-2001 06:17 PM
I also forgot to mention the valve body is programmed a little different on the original 65 c4 that came in the car. The original tranny, if manually put in second, will shift from a standstill, 1-2 and then stay in 2nd gear. The later tranny's if put in 2nd gear, will start out in 2nd gear and stay there without shifting at all.
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