Ella Walter
Ford transmission pans can be identified by the number of bolts they have. A Ford transmission pan with 14 bolts is likely an FMX transmission. The AOD trans pan also has 14 bolts, while the 4R70W has 16 bolts. The C4 is a case-fill transmission, while the C5 is a pan-fill transmission. The C5 transmission was introduced in 1965 when Ford beefed up the C4 for use with bigger motors.
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What You'll Learn
AOD trans pans have 14 bolts
When it comes to Ford transmissions, there are a few different types to consider. Firstly, there is the C5 transmission, which was introduced in 1982 when Ford added a converter clutch to the C4 transmission. This new design required a new series of casting numbers, which started with "E2". However, Ford decided to name this transmission the "C5", creating confusion in the industry.
Another type of Ford transmission is the AOD, which also has a 14-bolt pan. The AOD is different from the 4R70W, which has 16 bolts. The AOD transmission is identified by the letter "U" on the door pillar tag, while the 4R70W is identified by the letter "E".
It is important to note that the AOD transmission is electronically controlled, while the 4R70W is mechanical. The AOD transmission is also known for its wider ratio compared to the 4R70W.
In addition to the AOD and 4R70W, there is also the E4OD transmission, which has been confused with the AOD due to similar pan styles. However, the E4OD is identified by the letter "E" on the door pillar tag.
When identifying a Ford transmission, it is crucial to consider the number of bolts on the pan, the transmission code on the door pillar tag, and the presence of an electronic control or mechanical system.
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AOD and AODE share the same gear set
The AOD and AODE share the same gear set, but there are some differences between the two. The AOD is a mechanical transmission, while the AODE is electronically controlled. The AOD has a manual intermediate gear, while the AODE is computer-controlled and requires a stand-alone controller to function in an older vehicle. The AOD is also known for its large case, which can sometimes interfere with exhaust systems.
The AOD and AODE have wider gear ratios than the 4R70W. The AOD-E/4R70W transmission has better performance and responds well to minor upgrades. The factory torque converters used with the AOD-E/4R70W transmission are an improvement on the older AOD. The AOD-E/4R70W has all the advantages of a modern four-speed electronic automatic transmission without the drawbacks of the AOD.
The AOD was introduced in 1964 and was a case-fill transmission, with the dipstick in the case behind the bell. In 1965, Ford strengthened the transmission by bolting the bell to the case separately, instead of using the pump bolts. This redesign moved the dipstick to the pan, creating a pan-fill transmission. This new design was called the C5, with casting numbers starting with "C5". The C5 was manufactured until 1979.
In 1982, Ford redesigned the C4 again, adding a converter clutch. This redesign required new casting numbers, which started with "E2". However, Ford decided to name this transmission the C5, causing confusion in the industry. This version of the C5 was manufactured until 1986.
The AODE, also known as the 4R70W, has a wide-ratio gear set, offering better acceleration off the line. It includes all of Ford's improvements to the AOD and is more readily available for purchase.
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The AOD is very different from the 4R70W
The AOD was improved in 1986 and production ended in 1991. In 1991, Ford introduced the computer-controlled AOD-E, which was first installed in the Lincoln Town Car. The AOD-E and 4R70W employ lightweight components such as an aluminium front pump versus cast iron in the AOD. The AOD-E and 4R70W also feature stamped steel clutch packs instead of cast steel.
The AOD-E and 4R70W feature a locking torque converter with a conventional friction clutch instead of the locking overdrive unit found in the AOD. The AOD has dual input shafts (inner and outer), while the AOD-E and 4R70W have a single input shaft. The AOD-E and 4R70W also have an EPC (Electronic Pressure Control) solenoid for more predictable and controllable line pressure.
The 4R70W is considered a better transmission than the AOD, as it has a lock-up clutch torque converter, which allows it to run cooler and more economically. The AOD, on the other hand, has a TV cable that requires adjustment. The AOD-E and 4R70W also offer improved shift quality due to their electronic control.
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The C5 is a pan-fill transmission
The C5 was introduced in 1965 when Ford decided to beef up the C4 for use behind bigger motors. They strengthened the transmission by attaching the bell to the case using separate bolts, instead of the pump bolts. This resulted in the dipstick being moved to the pan, creating a pan-fill transmission. The new casting numbers on the redesigned parts started with "C5", which is why the transmission was called a "C5".
The C5 was manufactured until 1979, while the C4 continued to be produced until 1983. In 1982, Ford redesigned the C4 by adding a converter clutch, which required a new series of casting numbers starting with "E2". However, Ford decided to name this redesigned transmission a "C5", creating confusion in the industry.
Despite this confusion, the C5 is distinct from the C4 and is identified by its pan-fill design.
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The C5 was a popular seller in 1979
The C5 transmission was one of the hottest sellers in 1979, according to a forum post by M. Merlin on Ford Muscle Cars Tech Forum. However, there seems to be some confusion regarding the C5 transmission and its release date.
Merlin states that they entered the transmission industry in 1979, and the C5 was one of the most popular sellers at that time. However, they also acknowledge the confusion that arose when Ford added a converter clutch to the C4 transmission in 1982 and decided to call it the "C5." This renaming caused a lot of confusion in the industry, especially since the original C5, which the C4 with a converter clutch was mistaken for, was believed to have been introduced in 1982.
To clarify, the C5 transmission introduced in 1982 was a redesign of the C4 transmission, which was produced from 1964 to 1981. This redesigned C5 featured a lock-up clutch in the torque converter, improving highway fuel economy. It was produced from 1982 to 1986 and bore casting numbers E2, E3, E4, E5, and E6, corresponding to its production years.
The original C5 transmission, which was popular in 1979, was a pan-fill transmission, in contrast to the C4, which was a case-fill transmission. This distinction was made clear by M. Merlin, who stated that the dipstick on the C4 was located in the case behind the bell, while the C5 had the dipstick moved to the pan.
The C5 transmission was sought after by transmission builders due to its ability to handle a lot of power, and it was considered a decent choice for cruising around. It offered improved highway fuel economy compared to the C4, although the addition of the lock-up clutch made it heavier and negatively impacted performance in some cases.
In summary, the C5 transmission was indeed a popular seller in 1979, according to M. Merlin's forum post. However, the renaming of a modified C4 transmission as the "C5" in 1982 caused confusion, leading to the belief that the C5 was introduced that year. The original C5, popular in 1979, was a pan-fill transmission with improved fuel economy over the C4.
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Frequently asked questions
The C5 transmission was introduced in 1965 when Ford decided to beef up the C4 for use behind bigger motors. The C5 has a dipstick in the pan, making it a pan-fill transmission.
The C4 transmission has the dipstick in the case behind the bell, making it a case-fill transmission. The C5, on the other hand, has the dipstick in the pan.
The AOD transmission pan has 14 bolts, while the 4R70W has 16 bolts.
You can identify your Ford transmission by checking the door pillar tag for the transmission code. You can also count the number of bolts on the transmission pan. For example, a 14-bolt pan indicates an FMX transmission.
