Paul, I have purchased a transGo 40-2 rebuild/shift kit. I know I have the "B" valve body, but it is missing the Trottle Pressure Limit Valve & Spring In your article on hotroding c4's you say to set this asside I'm assumeing for re-installation. I skimmed the article, but didn't see the re-instalation of this item. Doesn't mean I didn't miss it. At any rate, what exactly does the TPLV&S do, why does it do it, do I need it, were can I get a new one? Thanks Lou
The valve and spring keep you from killing the tranny by putting too much pressure to it. Thay are necessary - If you don't install them your tranny will not run at all. You can get them at any transmission parts house. I will look at my instructions and see if I lefy a step out but I think it is included in the torquing process of the valve body. edit: You are right - I had left the step out! It is there now, thank you for finding it!
Well now I now why my tranny went to sh**!!! When I first got the car, I commenced to do some maintenance, not all of which I was knowledgable enough to conduct, (ie. changed the tranny filter without realizing there was a valve and spring being held in by it. I could probably get a metle detector out in the drive and find it if I was so inclined. I think not!!! After the fluid change, the tranny just slowly went down hill until it would bearly pull the car around the drive. That is what prompted the rebuild in the first place. Of course I knew I was not qualified to do a rebuild, so I started doing research, your posts, peoples questions, tech manuals, etc. It was only after your last post that I started to come to the conclussion that I was probably the cause of my own heartach. To make a short story longer, I am still no tranny expert, but have learned, and continue to learn more and more about the c4. Even though I am useing the old school of hard knocks to get my education, I'm glad that I am going through the process. Thanks for all your patient assistance to all like me who jump into the deep end of the pool only to have to get pulled out. Lou
Lou, The C4 is a good tranny to learn with because it is pretty basic. The few sticking points are that you have to put all the necessary parts back in! :^) lol The pert# is K26909 or Ford# D5AZ-7E368-A for the kit which contains the valve and spring. The valve has a small shaft that goes into the spring and it goes into the valve body with the valve first and then the spring. The filter compresses the spring to the correct length when it is installed.
Paul, My old High School shop teacher used to say; "If you have any parts left over put 'em in the gas tank!! That way if the customer asks if everything went back in o.k., you can honestly say it's all in there!!!" I guese you got to know what all came out before you can put the spare stuff in the tank Lou
The nice thing about the C4 is that all the parts are in neet little assemblies that are rebuilt one at a time. Then you put them back in that tranny and they just go together like you pulled them out. If you disassemble it using something to record all the information - step by step - then you know exactly what you need to do to make it perfect when you are done with it. BTW I am waiting for that email....
Refresh my memory, what was I supposed to send??? And yes, once I finnaly got the courage to dive into the tranny, I have been very carfull not to tear anything apart that I am not ready to put back together...1st is the valve body. Once that is all tiedied up I will put the tranny on its tail and start dissasembly, inspection, reaseembly. Is there anything I should look for when inspecting the bands. Are these items typically good for reinstalation? I forgot to ask! When I put the valve body back together, should I use any locktight on the bolts, or just clean them up real well and torch to the proper speck? I had another quesiton, but I forgot what it was!!! Thanks again Lou
Just torque them to between 18 and 20 INCH pounds. There is no need for any chemicals. Make sure you have the shuttle balls in the right place and your mods are completely done.
The rear band, low / reverse band, as long as there is no black on it can be reused. Throw the intermediate (second gear) band away and install a new one make sure it is a flex band. Look at the ends where they are spot welded on to the band. There should be at least seven spot welds on the attaching points. If there are only two or three buy one from somewhere else. Sand the drum that the intermediate band rides on with 120 or 220 grit sandpaper. You don't want to polish it but you do want a slightly sanded finish. If it has a mirror finish it will slip and if it is too rough it will wear the band too quickly. If the drum is scored from contact with the metal of the band you will need to replace the drum. Most tranny shops have used drums that they will sell for a decent price.
Thanks again Paul. hope to start in again this weekend. I just had a thought--They are few and far between, and usually cause pain. I have access to a donner transmission in a 77 granada that I was going to take the floor shift out of. I should probably give the guy 50$ and take the entire thing. Just to let folks know, I am not above hearing advice from other folks. I'm just not going to take it if Paul says not to Additionally, I you are new to the tranny world and you want to temporarily hi-jack this thread--feel free. Lou
A spare tranny is always a good thing! $50 is about the right price in my area. Cores run from $50 - $75 for C4 and C5 trannys. You can learn a lot with your old tranny before it is broken to the point where it isn't usable; come to think of it as long as the case is in one piece it is always rebuildable so you can have the spare in case yours begins to act up. rebuild the spare and do the exchange and then you have another spare. Don't build the tranny and let it sit on the shelf - the clutches and bands will "dry out" and they won't work well whe installed. Just clean it tear it down and make the mods you need and then put it together as needed. You could also trade a rebuilt spare for another better tranny if a friend needs one. You end up with a better core and your friend has a better tranny than he had at the time.
