C-6 Theory of operation - 460 Ford Forum
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post #1 of 21 (permalink) Old 01-10-2019, 06:37 AM Thread Starter
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C-6 Theory of operation

Well I got my Bronco engine running great but the tranny is all goofed up somehow. I had issues with the shifter arm before and bought one with like 10 holes in it and found one that matched the detents on shifter and the valve body. It was working great then the tranny sat 7 years. It had a full rebuild and about 15 passes before it sat. Won't shift into 2nd sometimes goes straight to third. Hughes did the work and had it all goofed up. I had a hipster trans brake and had a 2-3 flare It took Hughes two times to fix it and they put their trans brake in.


Anyway first thing I want to know how this thing works. What is the order that the valve body applies pressure to the forword clutch, direct clutch, intermediate servo, and low and reverse clutch to get 1 2 3 N and R and brake I'm guessing the governor is not used and no modulator

I have been looking everywhere to learn what takes place in there so I can start to troubleshooting this thing. Anyone have a link to this information ?

I get lots of arm chair quarterbacking about it's this or that check your line pressure but first I want to know how it works!!!

Thanks, Pat
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post #2 of 21 (permalink) Old 01-10-2019, 09:43 PM
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I'll msg you a link of my c6 books. If after reading them you need any further assistance, please let me know.

One of the books in particular is very specific on the hydraulic paths in each gear, very nice to see the images as it's hard to visualize sometimes.

Drew
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post #3 of 21 (permalink) Old 01-11-2019, 02:53 AM Thread Starter
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Thank you Drew for doing that. It is about time I learned what goes on in there so I can fix it myself. I did come across something on line that might be part of what I need. But like you said sometimes it's hard to visualize. Plus I have a reverse pattern manual valve body with brake so some things don't apply when I read some of this stuff.


Here is what I found and on page 44 has some info https://shop.ukrtrans.biz/wp-content...atalogs/C6.pdf

Pat

Last edited by 598BroncoBeast; 01-11-2019 at 02:56 AM.
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post #4 of 21 (permalink) Old 01-11-2019, 03:49 AM
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1st gear in D is forward clutch and roller clutch
1st gear 1 is forward clutch and low/reverse clutch
2nd gear is forward clutch and intermediate band
3rd gear is forward clutch and High/reverse clutch

Reverse is Low/reverse and high clutch

Of course N & P are no clutches
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post #5 of 21 (permalink) Old 01-11-2019, 03:51 AM
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Oh , RMVB can vary on 1st gear whether low/reverse is on in 1 or not
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post #6 of 21 (permalink) Old 01-11-2019, 02:59 PM Thread Starter
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Thanks for that Gregaust. I'm taking it all in. I found this also, some planetary gear basics for review on page 4 and 5



https://www.forelpublishing.com/demo/Demo10173.pdf
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post #7 of 21 (permalink) Old 01-12-2019, 12:21 AM
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These will have a bit more detail . The 2nd link is the full version of what you have

https://shop.ukrtrans.biz/wp-content...atalogs/C6.pdf

1970 Ford C6 Transmission Trainign Handbook
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post #8 of 21 (permalink) Old 01-12-2019, 01:58 AM Thread Starter
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Now there are the schematic diagrams I have been looking for. I'll be doing some studying.
Thanks again

Pat
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Last edited by 598BroncoBeast; 01-13-2019 at 04:19 AM.
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post #9 of 21 (permalink) Old 01-14-2019, 09:48 PM
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I'll be in the Phoenix AZ area mid feb , give me a call so evening ! I'll come and show you how to build a C6
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post #10 of 21 (permalink) Old 01-14-2019, 09:52 PM
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I'll also be in New Orleans Jan 23-30th
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post #11 of 21 (permalink) Old 01-15-2019, 06:54 PM
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I would take him up on his offer

80 Fairmont wagon, 528, Blue Thunder heads on E-85. Just a brutal street car
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post #12 of 21 (permalink) Old 01-16-2019, 10:21 AM Thread Starter
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OK Frank that's great that you will be coming to Phoenix. It would be an honor to get some first class knowledge on the C-6 from you. The reason I have been studying the C-6 so hard is that I have been snow bound in a ski hut in Austria. I am reading these books cover to cover. I hope I get back while you are still there. I get back Feb 22nd. Are you racing ?

edit OK I see the Nationals Feb 22nd to Feb 24th. I'm sure that's why you'll be there. I'll give you a call

Pat
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Last edited by 598BroncoBeast; 01-16-2019 at 10:29 AM.
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post #13 of 21 (permalink) Old 01-18-2019, 10:45 PM
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I'm hoping to licence in the'71 Mustang funny car at Phoenix as I'm booked to run the March meet @ Bakersfield ,Ca march 5-10th
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post #14 of 21 (permalink) Old 01-18-2019, 11:08 PM
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I'm be packing enough VB's and parts to rebuild 7-8 C6's
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post #15 of 21 (permalink) Old 01-25-2019, 08:36 AM Thread Starter
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OK I went over most everything and now have some questions. I see people refer to direct clutch when I don't see that for C-6 would that be the forward clutch ? I only see that term for the AOD. I see sprag referred to would that be the one way clutch ?

I only am concerned with C-6 with reversed pattern transbrake I had a Hipster transbrake and had to hold the switch to back up why ? This one I have now you don't have to why ? low gear is forward clutch and low reverse clutch so is the high reverse clutch applied to get the brake action ? This stuff is not in those books.


Thanks in advance


Pat
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