I wouldn't use a C6 behind a 302. They are very good behind higher displacement engines with a lot of low end power but will sap the horsepower of a small engine like the 302 due to heavier internals. Go with the C4 or AOD and you will like it better.

 

Iam doing a 302/aod swap. The engine and tranny were out of a EFI lincolin I am converting the engine to carburated what do I do with the wiring harness for the tranny? Do I need to change some internal parts on the tranny when I have it rebuilt? Or do I need some type of computer?

 

I think c-4's and c-6's are strictly 3 speeds. The 4 is lighter duty then the 6.

 

Fomocosho, is it an AOD, or later, the only wires in an AOD was the neutral safety switch. If its one of the later models, it will be computer controled w/ real lock-up converter. The AOD used a special TC that used fluid drive in 1/2, and a solid shaft connecting 3/4 to the face of the TC, essentially a solid connection to the crankshaft.


The C4 trannys are fine, and if you run higher gears, 3.08-2.75ish, you can cruise (55-60) at a reasonable engine speed (2000-2500ish). A C6 behind a 302 will rob you of about 40-65 hp, so all that money spent hopping up that 5.0, will be wasted before it gets to the driveshaft, sorry. Also, if you run the higher gears, I would recommend an auxillary trans cooler to help with the heat build up at slower speeds.

 

hey guys, can i still use my original radiator with the swap and just install an oil cooler for the transmission?

 

I've been using a 302 with a c4 for years. I had 3.73:1 gears in my rear end. But just changed over to 3:1. The 3.73's were fine but out on the highway 70mph was top end. I used my original radiator with an external tranny cooler. You'll probably need to modify your throttle linkage as well. Good luck, John

 

An air to air cooler will not be enough cooling for the tranny in your neck of the woods IMHO, you'll need to install a radiator with cooling.

 

When I lived in Florida between the years of 1972 and 1998, I ran a non-radiator tranny cooler on a 34 Plymouth for 15 years, a 32 Ford for 12 years, and a 29 Ford for 10 years with no problems. These were all GM transmissions, however, and it might not be quite as hot in Florida as Texas but close...

 

[QUOTE=f_ford_custom]Fomocosho, is it an AOD, or later, the only wires in an AOD was the neutral safety switch. QUOTE]

My '93 Cougar AOD has two connectors, one for the VSS, IIRC, as well.

It's not an electronic OD tranny from what I have read.

 

Not all of the AOD's got the VSS. It was only used with cruise control. A standard speedo cable fits perfect.

There was 3 versions:
AOD 1980-92
AOD-E - 93-95
47RW 93+ (Used on the modular engines)

 

I just checked tonight it only has one connection coming out of it must not be an electronic one. Do I have to hook this connection up or will the tranny still work without it?

 

What year Lincoln? I had an 89 CV with PI package. 5.0 HO, AOD, and 4.10 gears. My tranny only had the Neutral Safety Switch, same as on C4/6. Round connector, 4/5/6 wires? not sure, there are two circuits in this switch, Start-hot on start only in, closed in P and N only, and Backup Lights-hot on run in, closed only in R.

No, you dont HAVE to connect the switch, but it will start in ANY gear, dangerous to drive, not good on tranny/starter, and also will not have backup lights; may need them to let others know you want to back out of a parking space, help to see where you are backing at night. Some also have another set of contacts: hot in run, closed in R, OD, D, Lo for throttle kicker on carb.

I say Lo, B/C I have seen the AOD with neumerous valvebodies,
PRNOD21-cannot remember year, but was F350 4bbl 5.8
PRNOD1-85 E150 (in 1, downshifts go to 2, then 1 when safe, when starting out, it wont shift past 1)
PRNOD2-89 CV (D and OD used 1 and 2, 2 used only 2), and
PRND21 with OD button, late (8/)92 E250, could be 93 electronics.

89 Crown Vic had cruise, but had VSS adapter under hood; 85 E150, not sure, no VSS on vehicle, 4th owner ; 92 E250, VSS on speedo cable head, had cable AND VSS; F350 was on T-case

 

Some of the floor shifters come with neutral safety switches in their kits, so that would be an option if you don't want or can't use the one from the tranny.

 

The C6 is a three speed. I believe (though I can't remember for certain) that the C4 is a 4spd, but not an OD tranny.

The C6 is a big heavy cast iron unit that's dang near bullet proof. Lots of racers use them so there are plenty of parts and a good aftermarket for them. However, they're made for big blocks and FE's not small blocks (351w on down).

I do have a question though, that I thought I'd put to the experts here...
(warning )

Anybody know know the gear reduction on a stock c6 in third gear? (Reason I'm asking is I've got a 410 I'm rebuilding and a C6 to mate it to (1966 version), with 3.25 rear, and I'd like to get a guess at how many rpm's I'll be running at if I'm cruising at 70mph. I know that if I can get the reduction ration of the top gear in the C6 I can calculate out the approximate rpms) Thanks to anybody who can point me in the right direction!

 

Well, my C-4 is a three speed. My C-6 was also, just bigger and stronger. Top gear is 1:1. Good Luck