1966 Ford Mustang Mechanical Information & Drawings

Transmissions

The base transmission was the 3 Speed Manual and was a fully synchronized in the 8 cylinder applications, the one used with the 200 six was not fully synchronized.

Automatic Transmission Shift Speeds (MPH)

C-4 Transmission
AXLE Ratio		2.80,2.83, 3.00, 3.89				3.20, 3.25,3.50
Throttle		Minimum		Maximum		Minimum	Maximum
Range	Shift	1964 -70	1971*	1964 -70	1971*	1964 – 70	1964 – 70
D1	1-2	7 – 11	9 – 11	28 – 47	37 – 52	8 – 10	26 – 49
D1-D2	2-3	10 – 25	10 – 25	52 – 83	66 – 84	11 – 24	43 – 84
D1-D2	3-1	11 Max	—-	—-	40 – 42	10 Max	—-
	3-1
D1-D2	3-2	—-	—-	77 Max	80 – 82	—-	83 Max
D1	3-1	—-	10 – 11	40 Max	40 – 42	—-	33 Max
	2-1	—-	32 – 45	40 Max	40 – 42	—-	33 Max
Low	2-1	29 Max	—-	—-	—-	32 Max	—-
C-6                             *302 2bbl Engine, 3.00:1 Axle, F78X14 tires
AXLE Ratio		3.00:1				3.50, 3.20, 3.25:1
Throttle		Minimum		Maximum		Minimum	Maximum
Range	Shift	1964-70	1971**	1964-70	1971**	1964-70	1964-70
D1	1 – 2	7 – 13	7 – 8	38 – 45	46 – 52	6 – 12	35 – 51
D1 – D2	2 – 3	11 – 21	7 – 18	72 – 82	78 – 86	16 – 20	66 – 84
D1 – D2	3 – 1 3 – 2	9 Max	7 – 8	—-	—-	9 Max	—-
D1 – D2	3 – 2	—-	—-	73 Max	66 – 77	—-	75 Max
D1	3 – 1 2 – 1	—-	—-	34 Max	34 – 41	—-	40 Max
Low	2 – 1	9 Max	22 – 30	—-	—-	9 Max	—-
Ford-O-Matic (1964 – 70)      **351 4bbl, 3.00:1, F78 x 14 tires.
AXLE Ratio		3.00,3.10, 3.20, 3.25:1				3.50, 4.00:1
Range	Shift	Throttle
		Minimum		Maximum		Minimum	Maximum
D	1 – 2	12 – 19		45 – 60		10 – 16	36 – 52
D	2 – 1	16 Max		—-		14 Max	—-
D	2 – 1	—-		59 Max		—-	51 Max