1973 302/c4
Thread Starter
|
Senior User
Joined: May 2004
Posts: 113
Likes: 0
1973 302/c4
Does anyone know what the difference is in the C4 and C6 tranny's? Will a C6 fit a 302? I know the C6 is 4 inches longer than the C4, and a shorter driveshaft, but are they interchangeble on a 302?
Thanks
Thanks
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
The case is a one piece unit so the bellhousing/case will fit only the engine series it was designed for. Unfortunately there are also internal differences in the valving clutches and other items that are specific to a particular application. Transmissions from a 300-6 will bolt up to a 302 or 351W or a 351C but it will not bolt up to a 351M, 400, 429, 460, 390, 352, or 477/8. A C6 from a 300-6 will bolt up to a 351W but it will not shift right. The C6 is a heavier transmission capable of handling higher torque and HP than the C4. The C4 was generally used behind the lower power engines. The C6 was used in HD applications and higher power engines.
Posting Guru
Joined: Sep 2005
Posts: 2,238
Likes: 0
From: Kiefer, Northeastern Okla
C6 differences
What he's saying is, you can use a C6 if it originally came out of a truck with the same engine (the same bolt pattern). The C6 does not have a seperate bell housing that can be swapped out. They simply made C6's to fit different engine families. They were also valved differently for each application, so a tranny from a car with the same engine will not perform the same as one from a truck.
On edit, I have a '79 302 F150 with a C6, and also a '70 302 F150 with a C4. Now, if I wanted, I could swap trannies, because of the similarities. Or, I could use the C4 in another application, because I could change the bell housing.
On edit, I have a '79 302 F150 with a C6, and also a '70 302 F150 with a C4. Now, if I wanted, I could swap trannies, because of the similarities. Or, I could use the C4 in another application, because I could change the bell housing.
Last edited by petes79f150; Mar 31, 2006 at 06:58 PM. Reason: Also
Thread Starter
|
Senior User
Joined: May 2004
Posts: 113
Likes: 0
What is the difference in the C4 and C6? I have a C4. I will have 400 HP in the 302 when I am done. Will the C4 hold up to it in a street use?
I have a C6 in the garage, but if the 4 will hold up in street use with 400 HP, I wont change it.
Thanks
I have a C6 in the garage, but if the 4 will hold up in street use with 400 HP, I wont change it.
Thanks
Trending Topics
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Posting Guru
Joined: Sep 2005
Posts: 2,238
Likes: 0
From: Kiefer, Northeastern Okla
The C4 will handle it- with the right upgrades. Summit and I'm sure others sell parts to beef up the innards. Lots of guys use them for drag racing instead of the C6, which is heavier-duty, because the C4 is so much lighter.
Thread
Thread Starter
Forum
Replies
Last Post
rollingthunder1
1967 - 1972 F-100 & Larger F-Series Trucks
9
May 4, 2001 07:01 PM
