Seperating a 901 Transmission from Engine

[chris belyea]

Hello all

I just purchased a 1970 911E about a month ago. I dropped the engine this weekend but could not remove the transmission from the engine case. It's separated about a 1/2" from the case but seems to be caught the release fork. I can't see how to remove the release fork. I'm a missing something or is the transmission just being stubborn?

Chris

[al lkosmal]

Chris,
Right about the 1970 model year the clutch arrangement changed from a push type to a pull type. What this may mean for you is that you need to turn the flywheel until you see one of three rivet heads appear. These are threaded internally. You need to make or buy three spacers. (.50 O.D. x .25 I.D. x .25 long) Screw a M6 x 12mm long socket head screw through the spacer into the threaded rivet head. Rotate the flywheel and do all three. Tightening these screws will remove the tension on the throwout bearing. Now, take a screw driver and through the opening (right/top?) in the tranny housing rotate the throwout bearing 90 degrees, until it is free from the fork. now you can remove the tranny.

PS: before you do all this, try unscrewing the adjusting screw on the clutch release fork. This would free everything up enough on my 71E to allow me to rotate the throwout bearing.

I hope that this was clear enough to help you out.

regards,
al

[jpnovak]

Al has the procedure correct.

In my experience you can detach the throw-out bearing (TOB) using a lever device through the access hole. Just pull forward on the shift clutch fork until it bottoms on the case while simultaneously rotating the bearing using the "tang" visible from the top access port.

I have never been successful to reattach the clutch fork on the 70-71 transmission without using the built-in tension screws on the PP.

Good luck.

Jamie

[chris belyea]

I have the push type clutch so I'll give it a look and see.

Thanks for the help.

Chris

[stownsen914]

I have the 70-71 911 clutch setup on my 914/6 track car. I've separated the trans from the engine a number of times without having to use the screws to relieve tension on the clutch first. It's been no trouble getting to the T/O bearing to turn it using a long screwdriver through the opening in the bell housing. Then the trans pulls away easily.

Scott

[chris belyea]

I got it separated this weekend. Once I relieved the tension from the clutch fork on the throwout bearing, I was able to rotate the throwout bearing 90 degrees and the transition came off without a problem.

Thanks

[tom1394racing]

Chris

I just did this today.

You need to rotate the crank/flywheel until you see the threaded holes in the flywheel through the starter opening. I used Allen head screws with nuts as spacers to release the pressure on throw out bearing and clutch fork.



Instead of rotating the throwout bearing as described in the workshop manual, I removed the clutch fork adjustment/attachment bolt and slipped the fork, pressure plate and release bearing off together.

[47silver]

thanks for posting the measurements for the spacer, i was searching on google for 10 minutes until i found this.

[cba4]

Chris

We had the same issue with our 1971E. With the transmission bolted to the motor pull the clutch fork toward the transmission (there is probably only about 1/4" to 1/2" till it touches the transmission case). on the top of the transmission are 2 access holes. use a long screwdriver to rotate the throughout barring roughly 90degrees. The clutch fork will drop away and you can then unbolt the transmission. Good luck!