C4 with a 400
Cargo Master
Joined: Mar 2001
Posts: 2,759
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From: Elk River, MN
C4 with a 400
I don't think I have ever seen a C-4 with a big block bolt pattern. Anyway, they are not made for that kind of torque. You are right, you need a C-6. The FMX is an earlier auto, but C-6 was around a long time, so there are lots of them to pick from or rebuild. TCI new in the box C-6 runs about $750 plus shipping, but you can get a local one rebuilt for a lot less.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
C4 with a 400
Tommie, Do you need a C6 for a 400? I have one.
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John
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66F100s Rule
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66F100s Rule
In the cool still quiet of night you can hear chevies rusting away.
New User
Joined: Aug 2001
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C4 with a 400
There were some car C4's with the big block 351M/400M/429/460 pattern produced in the mid 70's. These are highly sought after by the drag racing crowd as the C4 is a tough tranny that uses less power to drive it and weighs less that a C6. It does take some building (meaning $$) to handle the power of a built big block however. My .02
1978 F-250 Ranger Supercab,460,C6,NP205,Dana 60 frt&rear,4:10's, 33"MT's...Sony, MTX and Kenwood
1978 F-250 Ranger Supercab,460,C6,NP205,Dana 60 frt&rear,4:10's, 33"MT's...Sony, MTX and Kenwood
New User
Joined: Sep 2001
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C4 with a 400
Do you have any idea what those "big block" pattern C-4's came in ? Iv'e sure never seen or heard that one before. It'd be worth lookin for if I knew what they came in. I know there were some early 351m/400's that had the small block bellhousing pattern.
I see where Lentech, (I believe) is making a 385 series bellhousing for the C-4, for the race crowd. That would enable you to use one behind a 351m/400 to I suppose.
Phil
Rice should be eaten....not driven
I see where Lentech, (I believe) is making a 385 series bellhousing for the C-4, for the race crowd. That would enable you to use one behind a 351m/400 to I suppose.
Phil
Rice should be eaten....not driven
Senior User
Joined: Aug 2001
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C4 with a 400
forget about spending the extra $$ on a C4 that is built enough to take big block torque, just go with a rebuilt C6, that tranny is bullet proof, wont give you any problems (if its a quality rebuild) for the life of the truck providing it aint used for what it is intended for....so just get a C6 and forget the C4
Senior User
Joined: Jun 2001
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From: Alabama
C4 with a 400
I'm pretty sure my brother has a big block bellhousing C-4. I can't remember what he got it out of. I will probably swipe it from him to go into my mustang though.
But if you already have a M/385 bellhousing C-4 I would not hesitate running it. Actually, I would probably sell it and have the money for a fresh C-6. The C-4 is lighter, can handle the power, needs to be built with quality components, and uses less HP. Which is why drag racers want them. Sure you can buy a lentech or I think total performance is making one too, but why not splurge and get the glide adapter.
chris
79 F-150 Ranger Lariat, 2wd, RC, LB, 460 (intake, headers, cam), C-6(shift kit).
79 mustang (work in progress...its just slow progress)
98 Chevy 4x4 (work truck)
95 Lexus SC300 (wife's baby)
But if you already have a M/385 bellhousing C-4 I would not hesitate running it. Actually, I would probably sell it and have the money for a fresh C-6. The C-4 is lighter, can handle the power, needs to be built with quality components, and uses less HP. Which is why drag racers want them. Sure you can buy a lentech or I think total performance is making one too, but why not splurge and get the glide adapter.
chris
79 F-150 Ranger Lariat, 2wd, RC, LB, 460 (intake, headers, cam), C-6(shift kit).
79 mustang (work in progress...its just slow progress)
98 Chevy 4x4 (work truck)
95 Lexus SC300 (wife's baby)
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Senior User
Joined: Aug 2001
Posts: 118
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C4 with a 400
It might start slipping prematurely and you my find yourself stuck someplace. They mostly put c-4s in cars and bronco 2's
you should go with a c-6 they can handle more torque. I have 280K on mine and it is still going, and going and going.
you should go with a c-6 they can handle more torque. I have 280K on mine and it is still going, and going and going.
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