Anyone want to guess what broke in tranny (c4}?

Did a big wheelstand came down kinda hard , first time having to peddle got back in second got squirally straightened it out and short shifted into 3rd firm bang then nothing in any gear, I am thinking input shaft or other hard part, should know tommarrow..., ED

Ed,
I would suspect an input shaft related problem since it has no gears....and the physical diameter if the C4 input shaft....leads me to that guess. I have a buddy that has snapped 2 with a small block.
Keith

yep input shaft.

I too would say the input shaft. I ran the C-4's with a C-6 converter and spline adapter for years, would split the adapter atleast once a year.

Travis

Cracked the forward drum and ripped out the splines. This was the 3rd pass , but was really first pass without ignition problem, boy it wasnt same car. I used a good early c4 drum and it was really tight 3 passes ago. Remember first two passes never got out of converter around 52-5500 rpms, i couldnt keep it under 7000 rpmsthis time and it never let the converter stall slow rpms, so it was making alot more torque and the stall speed footbrake showd it I hope a good welded one will hold this time., ED

what's the weight on your car?

around 3150 with driver

your Problem lies in the C-4 they are not very strong as everyone thinks they are....


Randy

They will handle quite a bit, the stock drums don't last long behind torque.............

How hard to drill after welding? Do i nead to weld it flush requiring machining flat? Trying to decide to buy one or find one and have it done.,/,,ED

The ones I used were silicon bronzed, I think I got it from Dynamic Racing Transmission, not that expensive, hole already drilled.

Stator support will do the same thing..

Ace

Like to find one without and thrills, stock spring type not already loaded, my stuff is still new, cant find anything from dynamic, suspose to call back/.,

Jay broader performance in Texas. or try clickclick.com

Ace

I like the thought of brazing, my grandfather brazes everthing out at the farm= easy to drill also, wonder what brazing rod if theres a differance././., ED

fwiw... Joels On Joy in Detroit builds tons of C4's... he built the C4 thats in the Mustang "cobra jet" race car that Ford sells. Also created the C2 trans thats in them too.

I had my rollerized C6 built by him.

Shane

glide would be the easiest. buy one and be done.

I dont need this thing bullet proof. A few weekend a yr. on test and tune. I dont like E.T racing ,I hate loosing lol. I plan on going to cruise Inns and some car stuff, shows. It never even sees race gas. I am however looking into a glide and see if it still beable to do some cruising like the c4. The big plus is i am familar with a c4 not any other tranny. I aleast giving it one more chance ,it could of been a fluke.

whatbumper wrote:glide would be the easiest. buy one and be done.

he'[s already been beaten up about a glide enough over on the bullet......lol


One day you will realize it is the right path, make the switch, then wonder why the hell you fought the c4 for so long...............in my case the 4000 dollar C4 I had is living a long happy life behind our smallblock now.............

glides are easy. I have rebuilt them at the track for people and I am not the smartest in the world.

I loved my C4, but the maintenance gets old. maybe try a TH400 if you got your heart set on a 3 speed.

Barney wrote:I loved my C4, but the maintenance gets old. maybe try a TH400 if you got your heart set on a 3 speed.

or a c6.

I dont feel bad this is the first c4 that i have ever hurt and used to spray the converter on brake. I might need to change the R servo to take away some kick in third. Still did a second gear burnout at Beechbend with the small 2nd apply. I wouldnt mind having a 400Turbo if i could work it.