Thread: tips on replacing C4 front pump

Tweet

well i tried it with the pan on but its in there tight. I pulled the pan and valve body tried to pry up on drum its in there real tight. I tried some heat lightly around the case but with no luck . I'm starting to soak it now with some penetrating oil maybe try it again in a few days after it soaks in a bit .

Denny there are no jacking screw locations would be nice though . The idea of the upside down wood tap might work , but will that disturb the inner drum and band enough to create a pain putting new pump back in .

hmmmm. Throw it all away and put in a 5 speed???? Sorry, don't know poop about automatics!!!!

Denny bell is off but this being what looks like the original pump its really tight in the case . May be seized to the aluminum

Dave the only 5spd i have is allready mounted in the 31 . Since this mustang is going to a new home it will stay auto.

its been soaking in pen oil 2 days . yep i read it it will be a attempt if need be.

Denny the tapping of holes hit me when i took pic i'm going to give that a try with the hose clamps to keep it even . Good ideas and maybe i'll heat the case abit to help relieve some of the pressure . Thank you but please stay tuned if i need a bigger hammer .

Denny Thanks again i'll post up in next couple days as to the out come .

something may have to die in the effort .. as a last resort put the input shaft back in and flail it side to side with a big hammer .. may damage a plastic washer or brash bushing but it may break the pump loose .. and the front clutch drum will no doubt come out with it ..

Right out of my C4 manual - I hope you can read it, if not PM me with your email and we can try that way. I can also copy and snail mail the entire manual or if you can find one, they are in most Ford shop manuals up to about '78(I have forgotten when they phased out C4s)

Denny idea of threading works great . I brought home a 7/16 tap gave me deep enough thread to hold bolt securely. Quickly fabbed a end for the puller to grab head of bolt and with in a couple minutes it was out .

Ireland i tried the pry and this pump was stuck . I didnt want to bring out anything else since i have no knowledge of getting it back in .

Hoss its not a big block LOL only small hammers for this C4

Some pics of process.

Many Thanks again to everyone

Got lucky and didnt loosen or change the band , after i clean up gasket surface i'll get to putting new one in . I see the little rings do look touchy i will go at them slowly . Vasaline will break down easier then a grease should i use a little of that.

Denny this is a remanned trans pump i hope they specked it out and replaced any worn out bushings . I have a new front seal so thats ok for sure . I give the bushing a good look over though just to be sure .

I'll be back double reading this to to make sure i follow thru

Good job - looks like a bit of rust from the pump casting was the culprit. And yes, Vaseline works well. Give a shout if you need anything from my C4 book

Ireland thats remnants of the gasket material but that and a tight fit is what needed some persuasion . There was a little oxidizing going on from alum and steel together but the soaking in pen oil i think helped that out to release some..

well got 3 out of the four little rings off pump and back on successfull but snapped the retainer end on one . (&^%*^&% they are some very small clips that hold them together .. im going to try a little trick soon and hope i get the pump slide back in .