C4 restoration

68xstang · Oct 20, 2010

Hi,

I have some spare time while my mustang is in for a paint job, which I could use to go through my C4 transmission. The car is 42 years old (a -68 coupe), and as far as I know the transmission has never been touched.

Therefore I think it's time to have a look at it. There is nothing wrong with the transmission, it works as it should, but considering that I will boost the engine HP, I should also "strengthen" the transmission.

What would be the things to do and change/upgrade? Are there complete overhaul/performance kits available for use? Other comments?

mudbilly · Oct 20, 2010

put in a shift kit and a good stall converter...........i don't know any real technical details, since i had it done by a transmission shop....

but it really made a big difference in how the cars shifts

Wicked65 · Oct 20, 2010

The are a couple things to do to make a C4 better. A good Valve Body/ Transgo shift kit, Deep Pan with deep Filter to increase fluid, A good Stall converter per your application, and a good Transmission cooler. As far as internally, if you just do a good solid rebuild, using good parts from broaderperformance, hughes transmision, Performance Automatic, should make that trans last another 42 years. Badshoeproductions.com is a great source for a video on C4 rebiulding. Thats what i used for mine.

68xstang · Oct 21, 2010

mudbilly said:
put in a shift kit and a good stall converter...........i don't know any real technical details, since i had it done by a transmission shop....
but it really made a big difference in how the cars shifts

Please explain the big difference.

Wicked65 said:
The are a couple things to do to make a C4 better. A good Valve Body/ Transgo shift kit, Deep Pan with deep Filter to increase fluid, A good Stall converter per your application, and a good Transmission cooler. As far as internally, if you just do a good solid rebuild, using good parts from broaderperformance, hughes transmision, Performance Automatic, should make that trans last another 42 years. Badshoeproductions.com is a great source for a video on C4 rebiulding. Thats what i used for mine.

The cooler and deep pan are on my list already. The internals are what I am thinking about. E.g. what does the 47-2 reprogramming kit from TransGo include and what does it do?
How is the stall converter selected (what criteria)?

68xstang · Oct 21, 2010

Wicked65 said:
Badshoeproductions.com is a great source for a video on C4 rebiulding. Thats what i used for mine.

I cannot order this, since I live outside USA. Is there another place where I can get it?

palerider94 · Oct 21, 2010

Stall converter is based on cam and rear end gears. Transgo kit is has new springs for valve body and gaskets you need. Gives a little firmer shifts and allow you to manually shift thru the gears without delay. Even though not necessary a ratchet shifter to go a long with it is very sweet. call TCI and give them specs of car and they can tell what size stall to use. Also I would consider upgrading to a new trans 70+. You can get one thru TCI or others for about grand. If you will be running over 350+ HP your current trans internals will need to be upgraded. By the time you by the kit - pay for someone to rebuild cost close to the same. Plus the 70+ have stronger/larger input shafts and are more stout.

mudbilly · Oct 23, 2010

Quote:
Originally Posted by mudbilly
put in a shift kit and a good stall converter...........i don't know any real technical details, since i had it done by a transmission shop....
but it really made a big difference in how the cars shifts

68xstang said:
Please explain the big difference.

if i just drive normally, you can't tell anything except it has a little bump when it shifts...( i took this dude for a ride and he thought that i needed new universal joints...)............in fact i am usually in third gear before i know it...

.......but if i put my foot into it from a dead stop, it doesn't shift until it is revved pretty high and it'll chirp the wheels when hitting second, i have never kept my foot into it long enough (yet) to see how it handles going into third....

i have just begun experimenting with shifting it thru the gears manually.....

i know the builder had some concerns about the vacuum, because of my cam, like others mentioned, i think he did something with the regulator, or whatever that device is that linked from the intake to the tranny....

mine aleady had the cooler built into the radiator....

68xstang · Oct 25, 2010

I will go with the kit 47-2. Thanx for the posts everyone!

C4 restoration

68xstang

Member

mudbilly

Member

Wicked65

Member

68xstang

Member

68xstang

Member

palerider94

Member

mudbilly

Member

68xstang

Member

Similar threads

C4 restoration

Member

Member

Member

Member

Member

Member

Member

Member

Similar threads

Privacy & Transparency

Privacy & Transparency