c6 auto any good or junk

[ols0051]

I got a line on a 87 gt with a c6 with manual valve body.I know nothing about ford automatic transmissions so give me your info.Before I create another head ache for myself.

[Maroon 5.0 LX]

The C-6 has been around a long time. It's a tough old bird. I have one in my '94 van.

[gofastmercury]

If there anything wrong with the C6, its too robust. If you have a serious car by all means, use the C6. I figure tho that a C4 should run about 2 thenths faster in the 1/4. Less mass outside and inside. I run a C4 in my Comet. It lasts a full season, about 50 passes, then I pull it apart for new clutches and stuff.

[ultraflo]

The C6 is a good tranny for a grain truck ...the C4 is the way to go, as I've seen guys go into the 8's with them... less parasitic drag on the motor, and can handle it's fair share of HP/TQ

I can't speak from personal experience as I run a Jerico DR4

...but I agree with 'merc "its too robust."

[jim_howard_pdx]

I have raced c-4's, c-6's and FMX 3 speed autos. I think a C-6 will slow you down, the reason to use a c-6 is its torque capacity. It is the only stock tranny around that will take a 428 SCJ into the 10's all season long and laugh back at you. The c-4 is a great unit, and properly built will handle 500+ horsepower.

I am researching the AOD's and AODE's now. With just a few mods they can handle over 500 HP. Lenco has an awesome series of units, one is a street version with a lock up 4'th overdrive. You can run 4.30 gears and in overdrive the car will think it has 2.70's behind a C-4? This is having your cake and eating it too.

Just think it all through. An AOD with a solid shaft (will not do a lockup overdrive, but will handle 700 hp all day long), with the wide-ratio gear set, you could run 3.90 gears to 4.30 gears and by a terror on the street and strip. Then jump on the freeway and cruise like an eagle.

With my engine, this combo would turn 12.3 Quarters with a 4.30 rear end, and be spinning at 3,100 RPM at 85 mph on the freeway. This just sounds like TOO MUCH FUN.

If you do the AOD, do not use a unit that runs the stock gear pattern. Stock, the AOD runs 1st and 2nd gears through a non locked route, and 3rd and 4th run locked. This will just kill you racing on the street or on the track. Go with a fully manual valve body or a lenco valve body that redirects third gear through a non-lock route.

Most of the good tranny shops can get you a used AOD and rebuild it for your application. Just tell them what you do or do not want. Go for a 2800-3000 stall converter and make sure you run a big bad tranny cooler.

Now go beat up on some Chevy's for me.

[Mach 1]

Originally posted by jim_howard_pdx

Stock, the AOD runs 1st and 2nd gears through a non locked route, and 3rd and 4th run locked. This will just kill you racing on the street or on the track. Go with a fully manual valve body or a lenco valve body that redirects third gear through a non-lock route.

.

You dont need a full manual valve body or a lentech valve body. All you need is a short shaft, or a "one piece input shaft" and the corresponding non lock up converter.

this will eliminate all lockup in third gear as well as 4th