C-4 Rebuild
Just sent out a C-4 for rebuild. There are several recent threads on rebuild options, issues, and they have good information. You should research these.
Pay attention to Bronco Howies cemments in particular.
There seems to be 2 major questions you need answers for to help you choose how to rebuild you tranny.
1) How much engine do you have?
--Over 300 Hp or under
2) what is the predominant drive mission you have in mind?
--daily driver Conitinuous duty mild torque
--tow vehicle Continuous duty high torque
--drag/hill climb Short high torque
If you are 300hp or higher, a stronger rebuild might be an option, and upgrading key parts like the Planetary gear, pump, might be in order
If you plan to tow, stronger rebuild or selecting parts with higher efficiency like a low drag planetary gear might help.
If you have arun of the mill 302 and don't plan to do more than some general off-road driving then a plain old rebuild might just be the tikcket.
Our rebulder is a mustang racer, and he suggested a 6 pinion planetary gear upgrade, after calling around we found that that was frecommended for racers with 600 Hp or above, so we passed on that.
That leaves shift kits. Take your choice and chances, unless you know what you are doing, it's easy to mess up an then you are looking at buying anew valve body to correct your mistake.. All just to get a firmer(quicker) shift.
We wound up just doing a straight rebuild with new clutches, bands, and seals. The kit was $120. The rebuilder another $200 labor.
The two upgrades we chose to do over a plain rebuild was to add a B&M deep pan, mostly to keep from using the old pan that always leaked and a desire to add a tranny temp guage. It does have a drain plug with a magnet in it too..
The second upgrade (#1 on BroncoHowie's gospel) is adding an external cooler to keep temps down.
Unless you have a raging Bronco, a simple rebuild may be all you need for another 100K miles of fun..
How did this turn out for ya?
