i just swaped my 91 f 250 7.3 out to a 85 6.9 . the 85 had a automatic and the 91 has a five speed. i swaped fly wheels and bought a new clutch. evertything was working out til it came time to mate them. i worked on it for three hours and cant get them to go together. the new clutch is the same as the old one i just need that speical little trick

 

Did you use a alignment tool?

 

I've had luck using long bolts threw the bellhousing to the motor to aline them. Don't force them together just to get them lined up. Then use a socket and breaker bar on the crank bolt to turn the motor over to get the splines lined up on the input shaft and clutch. Sometimes they can be a booger.

 

tow.mater81,
Welcome to FTE and the IDI diesel forum.

Did you use a clutch alignment tool when bolting the clutch together?

I am going to guess yes as the answer.

The tilt of the engine, the tilt of the transmission has to be perfect for the shaft to go in the pilot bearing.
Also the rotation of the tranny has to match the engine so the alignment dowels go into place.

My guess is the tilt of the motor does not match the tranny, a jack under the tranny can help.

I usually have two helpers if at all possible when it comes time to mate the engine with the tranny and chassis.

How close the cross member and the transmission tunnel are to the engine when it is in place don't leave you much room for adjustment, so muscle sometimes has to adjust the angles.

When everything lines up, it will slide right in place with one hand.

One trick is to get two long bolts that thread into the engine adapter plate where the transmission bolts would normally be.
Cut the heads off and use them as long alignment dowels by getting them in the correct tranny holes.
Now as you slide the engine in place all you have to do is keep the space between the engine and tranny even top and bottom as well as side to side.
If you have two bolt holes lined up, then someone looking up between the tranny and the engine mounting surfaces can get the surfaces parallel it should slide right in.

Also turning the tranny output shaft back and forth with the tranny in gear will help line the tranny input shaft splines up with the clutch disc splines.

Those are the only tricks I use when I change one.

 

yes i used the aligment tool and i will try the longer bolts tomorrow . thank you for your help

 

Hey thanks for the help it worked great.