Ford C4 Transmission Direct Drum Modifications
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- Опубликовано: 14 окт 2024
- In this video Jay Robarge of Broader Performance will go over how to modify the Direct drum in a Ford C4 transmission for increased clutch capacity as well as discuss other modifications for high performance use.
Thanks Jay for the info,as a trans guy of 40yrs I can say the main thing is to keep the trans fluid cool a good aftermarket cooler bypassing the stock cooler is the ticket,especially when running a stall converter,cheers bud keep punching!
When I was 18 built my 1st trans a C4. Back then (in the 80's) everyone said C-4 named after the explosive b/c it will explode & need a C-6. The 1st one lasted a hour, 2nd time a week, 3rd time I never broke it. I notice you don't drill any holes in the drum to evac oil. Back then was popular to drill four 3/8" holes. I did that and it welded the plates together right in line with those holes. The hole from the factory is all needed to stop centrifugal force applying the drum. I think it was drilling the drum like that was the problem and that extra hole added enough oil to keep the clutches from rubbing and overheating in 1st. I still drilled the drum, but were about .90" hole one per clutch step staggered around the drum. Never had a problem with that and never added that hole in the piston.
Sorry meant to say .090" hole, not .90". That be kinda big. 🙂
Thanks for the info. I have done various configurations of holes on the outside of the drum but I cant say it seemed to help. Another mod that is hard to prove whether it works or not.
Really Really good stuff!! So nice to see and hear someone speak the truth!! We need to find some way, someone to really start making this stuff here at home domestically in the GOOD OLD USA!!🇺🇸
Yes we do. I hope to accomplish this in the near future. I wont outsource to China like the other sell outs.
@@BroaderPerformance
We all really need to do our best to buy and build AMERICAN AGAIN!! Everything we buy now, we used make!! And we did it better!!🙏🇺🇸🇺🇸
great work Jay, thank you for the fabulous information
You bet
I drilled a hole at an angle through the bottom.... No pressure loss at all... No more burnt clutches... I run stock B/W cluthes
What is the hole diameter?
Good videos , Jay. Thanks for sharing. On my units I drill relief holes on the band surface in line with the middle of the band and the drive tangs to aid band apply as well as high clutch apply. How do you feel about that mod?
I used to do it but I didnt find any real benefit to it so I no longer bother.
I run mostly stock C4 , with Kevlar intermediate band, stock reverse band. I seem to have most long-term trouble with the forward clutch pack. No trans-brake streetcar 425hp 4500stall . At that power level it will need clutches after 3 summers.
Years ago when I was at 600hp I could get through the summer but was weak for sure .What's your opinion at what i should look at next time I'm in it.?
Is the disc spring getting bent over broken?
@@BroaderPerformance no, never had that problem, I've heard of it. Never happened in any C4 in 35 years of mine. A friend has ..
Like to see something in the future on a E4OD
I really dont do much with those anymore. I appreciate the suggestion.
Thank you
You're welcome
Oh man my JPT drum looks like it has 4 .200 holes in that drum from old pics i'm looking at now,
Its fine. Wont cause any problems if its just drain holes in the band area.