How does a C4 transmission shift?
The C4 automatic transmission was introduced by Ford in 1964. It is equipped with a vacuum modulator that senses change in the engine’s vacuum due to throttle position and load changes. As these changes occur, the modulator adjusts the shift timing of the transmission according to the demand of the engine.
How many splines does a C4 transmission have?
One of the most important changes to happen to the C4 was the increase from 24 to 26 splines on the input shaft, which increased the durability of the transmission.
Are all Ford C4 transmissions the same?
The Ford C4 is a three-speed, medium-duty automatic transmission introduced on 1964 model year vehicles and produced through 1981. The C4 was designed to be a lighter and simpler replacement for the original Ford-O-Matic two speed transmission being used in smaller, less powerful cars….Ford C4 transmission.
| C4/C5 | |
|---|---|
| Overview | |
| Successor | AOD |
How much power can a C4 handle?
A built C4 for the street will hold 500HP, and a race C4 will hold over 700HP, but unfortunately the stock C4 behind a 450HP motor isn’t going to last long, do yourself a favor and rebuild the one you have.
Does a C4 transmission have overdrive?
Overdrive is another popular upgrade with a late-model AOD automatic or a five/six-speed manual. Gear Vendors now has an overdrive for virtually every vintage Ford transmission, including C4, C6, and Top Loader.
How much horsepower can a C4 transmission handle?
I’d say at least 400 ponys as long as it is in good shape. The question is more about “How long will it last” to me. There are guys running C4’s behind built 351C’s at the strip but they are highly modified. A stocker IMHO will take a 400 HP street blast every once in a while without grenading.
Is a Cruise O Matic a C4?
Because the original Ford-O-Matic started in second rather than first, it was marketed as a two-speed after the new three-speed transmissions were introduced. Production continued until it was replaced by the C4 in 1964 in smaller Ford and Mercury vehicles.
How do you tell the difference between a C4 and a C6 transmission?
On the C4, there will be 11 bolts while on a C6, there will be 17. Ascertain where the drain plug is situated at the transmission pan. If the plug is at the side of the transmission’s pan, it is the C6 but on the bottom means it’s a C4.
How much horsepower can a built C4 transmission handle?
A properly built stock C4 can handle 400-450 hp, depending on torque curve, vehicle weight and use.
What is the gear ratio for a C4 transmission?
C4 Transmission Gear Ratios Gear Ratio First 2.46:1 Second 1.46:1 Third 1.00:1 Reverse 2.18:1
Where do you put the shifter on a C4 transmission?
If you want to start out in second gear with the Dual-Range C4, you place the shifter at the small dot (off detent, next to neutral) where the transmission starts out in second gear and upshifts into final drive. The small-dot position was a feature designed to help motorists get started on snow and ice.
When did the Ford C4 transmission come out?
Versions of the C4 have also been produced for big-blocks. The C4 was produced from 1964 through 1981 at Ford’s Sharonville, Ohio, transmission plant. An interesting footnote is the C4’s status as the first automatic transmission ever designed and actually produced by Ford Motor Company.
What is the difference between a C4 and C5 transmission?
C4’s were produced and used in production cars and trucks from 1964 to 1981, when they were replaced by the three speed automatic transmission with lockup torque converter known as the C5. In this timeframe there were several versions, each with significant differences that, depending on your application, might make one better for you.