C-4 transmission holding fixture

[Mario428]

Been rolling my C-4's around on the bench for years and it is a major PITA so since I have time now I decided to build a holding fixture. Had to clamp onto the case so that I had access to 3 sides of the ******. There are 4 lugs on the case so I decided to use them. Try # 1 was such a disaster I refuse to show any pics of it. LOL

This is try # 2

Hooks into 3 of the lugs, one has the tailhousing bolt going thru it so not enough lug to get a hold of. So I have to drill a hole in every ****** I work on. Still lots of thread for the tailhousing bolt.

On the other 3 I slotted a pc of plate to fit inside the lug, then the nut on the threaded rod is adjusted to get the fixture tight on the ******.

I drilled a hole in the face of my bench I slide the fixture with ****** attached into. I have 3 index positions, pump up, VB up, tailshaft up.
That is a complete ****** mounted there, I gave it a good shake and it is solid as a rock.
Still needs some clean up and paint but I am a happy boy now. LOL

 

[JMLangford]

Looks like it's well thought out and designed......best get a patent on it before someone steals your design......



.

 

[Mario428]

Looks like it's well thought out and designed......best get a patent on it before someone steals your design......



.

Thank you
A patent is a ton of work and only good if you can afford to defend it.
Everyone who wants to is more than welcome to copy it, will send more pics if they want help.

 

[Provincial]

When I rebuilt the 4R100 in my 2001 F250, I built an adaptor to mount the transmission on an engine stand. I designed it to attach with the threaded holes in left the side of the transmission housing. I used 2x2x1/4 angle iron and 1/4x2 flat bar to make it. I used larger nuts as spacers in some spots. It is spaced away from the engine stand to allow the shift lever to be removed and installed.

 

[ProGun3400]

Very slick Mario! I agree 100%, rolling one around on the bench would be a royal PITA.....
Provincial, it looks good but appears us shorter fellas would have to stand on an upside down 5 gallon bucket to get down inside?
This is an OTC universal bell housing adapter, probably 30 years old. The chrome knob is spring loaded & has a pin that locks into the shaft at 4 positions, 90 degrees apart. For tear downs, we used a 30 gallon drum w/lid, 4" hole cut out of center with 1/4" holes drilled around outer inside edge of lid every "6 inches or so for fluid drainage.

 

[ProGun3400]

Here's what we used to tear down the majority of (GM) rear wheel drives. I sure wish I could figure out how to post multiple pics in the same post? If I recall correctly, the Chrysler 904/727's (like Fords) had the governor mounted to the output shaft, with governor housing that attaches to the back of the case?

 

[ProGun3400]

Here's the bench minus the sheet steel top.

 

[Provincial]

I am 5'8" tall, and for getting to the reverse clutch pack I use a 3-step ladder, but only to the second step. I could rotate the housing to get at most everything else in the back section. I was able to stand on the floor for almost everything.

If I worked on these transmissions a lot I would shorten an engine stand upright a little and take the casters off. Replacing the forward tube with two tubes at the outer ends of the crossbar would allow you to shorten the upright even more. Clearance between the tailshaft and the floor is the limiting dimension. If it is too low it is hard on my back.

 

[ms fowler]

The Factory Holding fixture used only 2 bolt holes.

I scanned the FSM, but can't find a way to attach the .pdf file.

 

[NUTTSGT]

A local guy has a similar mount for trans work albeit most of it is GM stuff.


What's with the welding around the bellhousing ?

 

[ProGun3400]

I am 5'8" tall, and for getting to the reverse clutch pack I use a 3-step ladder, but only to the second step. I could rotate the housing to get at most everything else in the back section. I was able to stand on the floor for almost everything. If I worked on these transmissions a lot I would shorten an engine stand upright a little and take the casters off. Replacing the forward tube with two tubes at the outer ends of the crossbar would allow you to shorten the upright even more. Clearance between the tailshaft and the floor is the limiting dimension. If it is too low it is hard on my back.

Understood. My brothers & I spent our summer breaks working in my dads trans shop. Many of the tools I've purchased over the years, some were inherited. I also have the trans holder that clamps into the two round bosses located on the sides of most GM RWD trannies. Still do some trans work for a few local classic car club guys near me & a brother-in-law that drag races. Mostly TH350, TH400's. If you're doing an occasional tyrannie, very expensive now to buy the tools.
My apologies to Mario, didn't mean to hijack his thread...

 

[ProGun3400]

The Factory Holding fixture used only 2 bolt holes.
I scanned the FSM, but can't find a way to attach the .pdf file.

I'm far from tech saavy, or one qualified to offer computer advice but maybe you can create, then upload it to an album on this site? I haven't posted on here in a while but years ago, I used ImageShack to host photos. Then I would copy/paste the link from ImageShack. Now I lost a bunch of pics unless I pay the ransom as they all want you to pay. I was able to upload pictures to this site via IPad & save them into several albums in my profile.

 

[Mario428]

Understood. My brothers & I spent our summer breaks working in my dads trans shop. Many of the tools I've purchased over the years, some were inherited. I also have the trans holder that clamps into the two round bosses located on the sides of most GM RWD trannies. Still do some trans work for a few local classic car club guys near me & a brother-in-law that drag races. Mostly TH350, TH400's. If you're doing an occasional tyrannie, very expensive now to buy the tools.
My apologies to Mario, didn't mean to hijack his thread...

Its all good, hopefully a few people learned something about working on transmissions.

 

[ms fowler]

I'm far from tech saavy, or one qualified to offer computer advice but maybe you can create, then upload it to an album on this site? I haven't posted on here in a while but years ago, I used ImageShack to host photos. Then I would copy/paste the link from ImageShack. Now I lost a bunch of pics unless I pay the ransom as they all want you to pay. I was able to upload pictures to this site via IPad & save them into several albums in my profile.

OK, thanks....I am surprised I can't just "attach" the file like an email, or many other sites
Neither am I very tech-savvy, but what you posted would be like the "wah, wha, wah" in a Peanuts cartoon whenever an adult was speaking...

It is surprising I can manage to find my way to work, and back home, again.....

 

[Spareparts]

Lost the bolts LOL

 

[Mario428]

What's with the welding around the bellhousing ?

I run my C-4 behind a Ford FE engine, stroked 427, same block as a 390, 428. Ford never made a C-4 bellhousing for them so I fabbed one. Cut the bellhousing off a C-6, welded a plate on it and machined the plate to suit the C-4.
C-4 is about 2 tenths quicker than a C-6 in the 1/4 mile.

 

[Capt Chrysler]

Chevy and Fords 5 gallon bucket with 2, 2x4 across the top. On the 904-727 trans the factory had a bracket that bolted to the top two bell housing bolts. This keep the valve body up. Never really liked it. As my bench and stand we're the wrong height. So I roll them with a 2x4 wedge to hold them in the position I want. Many not be right, but it worked for many years .

Capt. Chrysler