Join Date: Jul 2002
Location: Texas Hill Country
157 C4's are plentiful, and usually cheap. I just recently rebuilt a few for the first time. They are pretty easy. I would suggest you go with a 71 and up. 65/6 had the wonky green dot shift pattern, 67-69 had normal shift pattern, but were known to have failure (weakness) with about 400 HP. 70 was the upgrade, but had a unique input shaft with 26 splines on both ends, 71 and up went with 24/26 spline input shaft. These are the ones to build. Some even build the C5, as it has improved oiling. Go with 71 and up, a 40-2 transgo shift kit, and an "H" servo. I pulled the "correct" 70 trans out of my 70 coupe and installed the C4 that was in my F150 for 20 years. It is happy in the stang, and still gets a second gear chirp of the tires upon shifting to second. I also rebuilt a 67-69 trans, and had some difficulty finding thrust washers (supposedly obsolete-but found on EBAY), and the correct pump. I was told they are becoming very difficult to repair and they suggested I upgrade my case with internals from a 70 up- pump/ and guts. And that was from one of the biggest Trans parts suppliers in San Antonio.
65 FB 289/3sp Rangoon Red/Red interior
68 Coupe 200/6 T-5 Diamond Blue/Blue interior
68 Coupe 302/C4 Black interior
69 Coupe 250/6 C4, Blue/Black interior
70 Coupe 390/C6 Auto Gold Metallic/Ginger interior
2010 Gold V6/Auto Sunset Gold/Black interior
65 Falcon Vintage Burgundy/Palomino interior
Last edited by coupster; 03-29-2018 at 08:52 PM.