Is there such thing as a Ford C4 with overdrive, or do I need to move up to the C6 for an overdrive?

Question

Also, I plan on using a crate engine with 625 HP in my car, will the C4 be able to handle it?

Answer 1

for 625 horse youd want a c-6 if youre wanting any reliability. a c4 has to be built to take 600+ horse. neither the c6 nor the c4 are overdrive. if you want overdrive youll have to either get a manual transmission or an e40d

Answer 2

Everyone so far is correct the C4 and C6 are 3 speed automatics without overdrive. your best bet is to install a heavy duty E40D, but you will need a trans controller to work with the solenoid pack. Both trans the C4 and the C6 can me modified to handle the power, but the C6 is much stronger and bigger. If space is a problem then you will need to use the C4 and upgrade the input shaft and the forward clutch hub, cause they will strip or break. If you have the space then find a C6 and upgrade the clutches and converter. . In order to use the E40D you will have to find a way to install a controller that will make it shift. I do know that some early 90-92 diesals had a seperate controller that can be modified to work in this application.

Answer 3

C6 Overdrive

Answer 4

Without reading any of the other responses I can tell you that none of the C class trannies are overdrive.
The number behind the C was a determinite of the base strenghth.
EX. C4 is stronger than a C3, C6 was used in the HD applications of the time...

If you want overdrive go talk to a tranny shop to see which one will line in with your engine
OR
Buy an Underdrive/Overdrive unit.

Answer 5

You can have a C4 or a C6 built to handle your ponys, but a C4 is made more for performance as the C6 is made more for handling work such as towing.
Check out jegs dot com, I would wager you could find either or an after market tranny with an OD that will bolt up to your engine

Answer 6

C4, C6 are not overdrive but regular 3 speed automatic transmissions

Answer 7

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Contrary to basically all the previous posts, there IS a such thing as a '89 Mustang GT Cobra" or "Cobra GT." The confusion comes because, while there was no Foxbody "Cobra" in the U.S. until the '93 Cobra, many GT's in CANADA were labeled "Cobra GT" from 84-92. So, if the car is from Canada, it very well be a legitimate "Cobra GT", BUT there is no mechanical difference between it and a "standard" U.S. Mustang GT of the same year. It is not a higher performance vehicle than a "standard" GT. To reitterate, here is an excerpt from the website listed in my "sources": "While all 1982-1993 Canadian-export Mustangs did have slight differences from their U.S. counterparts, the biggest source of confusion for most people always seems to be regarding the 1984-1992 Canadian Mustang GT’s due to the addition of the word “Cobra” to their name by Ford of Canada. First of all, let’s get the proper terminology straight, because this is the key to generating the least amount of confusion about these cars… all 1984–1992 Mustang GT’s sold in Canada were marketed as “Mustang Cobra GT’s” by Ford. Hopefully by using ”Canadian Mustang Cobra GT” or “Cobra GT” for short, people will not be confused by other “Cobras” produced by Ford including the 1979-1981 Mustangs equipped with the Cobra package and the 1993-up SVT Cobras (more on these models later in the article). The term “Cobra GT” is found in 1984-1992 Canadian Ford sales brochures and other Ford-produced literature in place of the term “GT” used in U.S. Mustang literature. In addition, the words “Mustang Cobra GT” were also used on the window stickers of all 1984-1992 GT’s sold in Canada. The term “Cobra GT” was a direct replacement for the word “GT” in Ford of Canada Mustang literature during this time period. Interestingly, no other Mustang models such as the L, GL, GLX, LX, LX 5.0L Sport or Turbo GT received a different name in Canada. Canadians report that this “Mustang Cobra GT” terminology is also used when registering and insuring these cars in Canada. Canadian owners have also told us that even though Ford did not call the 1982-1983 and 1993 Mustang GT's "Cobra GT's", this terminology mistakenly shows up for 1982-1983 and 1993 Mustang GT's in insurance databases. The addition of the “Cobra” name leads many people to believe that these cars have additional performance equipment or special features over a regular U.S. GT, but that is NOT the case. The bottom line is 1984-1992 Canadian Cobra GT’s are simply the Canadian version of the U.S.-sold 1984–1992 Mustang GT. The difference is in NAME only; there are NO fundamental differences between the Canadian and U.S. GT models. Performance-wise, the 1984-1992 Canadian Cobra GT’s were absolutely no different than their American GT counterparts (including horsepower figures, available engines, transmissions and suspensions). This fact has been verified through a number of sources including the comparison of Canadian vs. U.S. Ford sales brochures and individual car’s build sheets and window stickers."

Answer 8

Make sure that the transmission is strengthened to support the new hp that you are installing.
C-6 is stronger but it is not an OD transmission.

Good luck.