Why is my transmission not working in my Ford C4?

When transmissions don’t engage, most of the time it is an improperly seated torque converter, a pump issue, or a manual shift valve problem. The following are common symptoms and their likely causes.

What does it mean when your transmission is not working?

Operating temperature is 150 to 170 degrees F. If (with a fluid reading on the dipstick) your transmission doesn’t engage, control pressure likely isn’t reaching servos and clutches. This means there’s either no control pressure or pressure isn’t making it to the clutches and servos.

Why do I need a half stick on my transmission?

You want a half-stick reading because fluid expands as it warms. Operating temperature is 150 to 170 degrees F. If (with a fluid reading on the dipstick) your transmission doesn’t engage, control pressure likely isn’t reaching servos and clutches.

When was the last time a C4 transmission was used?

This article should give you a better grasp on the different types and uses of C4 transmissions. 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.

How to rebuild and modify Ford C4 and C6 automatic transmissions?

This Tech Tip is From the Full Book, HOW TO REBUILD & MODIFY FORD C4 & C6 AUTOMATIC TRANSMISSIONS. For a comprehensive guide on this entire subject you can visit this link: SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read.

How much does a Ford C4 transmission weigh?

Dry (without fluid or a torque converter), the C4 weighed in at a nimble 110 pounds. Unlike many other transmissions, the C4 only had one set of gear ratios through all the years of its production.

When did Ford stop using the C4 transmission?

The C-4 was a remarkably long-lasting transmission and was in use until 1981, at which point it was replaced with the C-5, which was essentially a C-4 transmission with a locking torque converter.

Where to find part number for Ford C4 transmission?

If you do not know the Ford part number decoding system, look here. Hopefully this will shed some light onto some of the different versions and uses for the C4 transmission, and help you make the right decision on what’s right for your particular project.

Dry (without fluid or a torque converter), the C4 weighed in at a nimble 110 pounds. Unlike many other transmissions, the C4 only had one set of gear ratios through all the years of its production.

Is there a rebuild kit for a C4 transmission?

Most rebuild kits will have a full set of improved caskets. A rebuild kit may also have additional parts that will allow for an improved build. In some rebuild kits, you’ll see racing clutches, new friction plates, and new steel clutches. This should improve the “bite” of the transmission.

What does it mean when your transmission doesn’t engage?

If (with a fluid reading on the dipstick) your transmission doesn’t engage, control pressure likely isn’t reaching servos and clutches. This means there’s either no control pressure or pressure isn’t making it to the clutches and servos.

What causes O2 sensor to fail in F150?

If you have one cylinder that has a significantly less amount of compression than the others (more than 10% less), then that cylinder isn’t burning all of its fuel and pushing it into the exhaust, which can cause the O2 sensor to start failing. Was this answer helpful?

Why is my F-150 transmission shifting too hard?

F-150/F-250: Why is My Transmission Shifting Too Hard? A transmission that is shifting too hard generally has a problem with its fluid pressure. When that pressure is too high, shift can happen erratically and forcefully. This article applies to… Modern transmissions shift so softly and smoothly that we often forget they are even working.

Where is the transmission sticker on a Ford truck?

Check the sticker on the driver’s side door jamb to identify the truck’s transmission. The transmission field is circled in the figure below. Decipher the code using the following table. Figure 1. All Ford trucks come with an info sticker in the driver side door jamb. Turn your truck off and look at the instrument panel.

Where is the transmission code on a Ford truck?

The code for your transmission should appear in the circled area indicated in Figure 1. Your sticker might not look exactly like this, but the format should generally be the same. Figure 1. All Ford trucks come with an info sticker in the driver side door jamb. Turn the truck off and look at the instrument panel. Keep your OBD II code reader handy.

When did the Ford C6 transmission come out?

The Ford C6 is a heavy-duty automatic transmission built by Ford Motor Company between 1966 and 1996. It was marketed as the “SelectShift Cruise-O-Matic” Compared to its predecessor MX transmission, the C6 offered lower weight, less complexity, less parasitic power loss, and greater torque capacity for larger engines.

Where do I find the transmission code on my F-150?

Check the door jamb sticker in the F-150 or F-250 Super Duty to figure out all sorts of information about the truck, including which transmission it has. The code for your transmission should appear in the circled area indicated in Figure 1. Your sticker might not look exactly like this, but the format should generally be the same.

When did the Ford C4 transmission come out?

The Ford C4 is also called the Dual-Range Cruise-O-Matic, FMX transmission and it was produced around 1964 and was used until 1981. Specifically, the vehicles that came with a C4 transmission were the Ford Bronco between 1973 to 1977, and the Ford F-series between 1965 to 1981. Here’s what it looks like: Ford Bronco (1973–1977)

What’s the best way to shift a C4?

Adjusting clockwise will make the shifts later and counter-clockwise will make the shifts sooner. Never turn the screw more than 3-4 turns in either direction. The screw adjustment is there to set the proper pressure in relation to line pressure to ensure the pressures are correct for long life of the transmission.

What to do when automatic transmission won’t shift into 3rd gear?

Check the Throttle Cables. Changing the fluid solves plenty of transmission issues but if the problem of automatic transmission won’t shift into 3rd gear persists, the parts you should check are the throttle cables. A defective cable with excessive slack is likely to create issues with smooth shifting of the gears.

What’s the best way to shift a C4 muscle car?

First gear works great, then slap it into 2nd and shifts firm into 2nd gear, and then slap it into drive and the tranny goes into nutruel untill i slow down and then it goes into 1st gear.

Is there a car that won’t shift in drive?

Put it in first and it works fine, Put it in 2nd and it shifts from 1st to 2nd. Go from 2nd to Dr and it shifts back to first and won’t shift out of first. I vaguely remember that the trans didn’t shift right ( no drive) when it was in the Mustang II, but that was 17 years ago.

When did the Ford C4 automatic transmission come out?

How does the vacuum modulator work on a Ford C4?

by Max Stout. 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.

What causes a forward clutch to leak in a Ford C4?

Forward clutch pressure leak or improperly assembled (air check clutches by removing the valve body). Blocked filter. Governor valves malfunction.

How much horsepower can a C4 transmission handle?

There are a lot of performance rated C4s that are readily available if you’re replacing the transmission on a vehicle include a lot of valuable upgrades like a hardened input shaft or improved servo. The amount of horsepower that they can handle ranges from 450 to 1,000 hp.

Why is my transmission not working in my Ford C4?