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Old May 18, 2009 | 04:45 PM
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What's a C-4?

I have a line on a swap to a 300 six and the guy has a C-4 available. I want an auto for my convenience.
Is a C-4 a good reliable maint bet. Similar to a C-6 but what's the difference?
 
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Old May 18, 2009 | 08:25 PM
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It's the same design as the C6, just scaled down. Think of it as a smaller version of the C6.
 
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Old May 18, 2009 | 08:33 PM
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So it'd be safe to use behind a 300 six pulling a bass boat trailer occasionally. And other wise it'd be just fine. No different than a C-6 behind a small block V-8?

I can see some expenses coming up. If I dont have a Donor 300/C-4 I'm gonna have to come up with some linkages, a Torque Converter and a Auto TC plate.
The Steering column with the Shift indicator. What else?

Thanks.
 
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Old May 18, 2009 | 08:44 PM
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C4-s were stock transmissions behind 300-6 and 302's in 60-70 era pickup trucks. Also very common in Ford cars. C4s can be built to take a beating as many Mustangs have them. The small block C6 I had supposedly came out of an Econoline Van. You may find an easier time with drivelines and what-not going with the C4
 
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Old May 18, 2009 | 11:48 PM
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I thought it had two bands as opposed to one in the C6?
At any rate, I had one in my 69 F250 behind a 300-6, and it was decent. The only two problems were a torque converter noise that sounded like bad piston slap, and the nut on the yoke came loose. I put some RTV in the space behind the shaft splines in the yoke, and cranked the nut back down, no more leak and no more jumping speedometer.
 
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