How to engage throwout fork to throwout bearing when installing Porsche 915 trans

[Diggem]

I am working on a 1977 Porsche 911S. I already have my flywheel, clutch,ring gear and throwout bearing installed on the engine. How do you make sure the throwout fork engages the throwout bearing correctly when you are installing the Porsche 915 transaxle?

Never installed a 915 transaxle before.

[Nditiz1]

Originally Posted by Diggem

I am working on a 1977 Porsche 911S. I already have my flywheel, clutch,ring gear and throwout bearing installed on the engine. How do you make sure the throwout fork engages the throwout bearing correctly when you are installing the Porsche 915 transaxle?

Never installed a 915 transaxle before.

You should be able to see it from the crack above between the mateing surfaces.

Take it slow and you can use a thin screw driver if you need to move it until you get to the channel.

[john walker's workshop]

Hole in the back of the bellhousing.

[Diggem]

How should the fork be positioned when sliding the input shaft into the clutch? Is the fork supposed to be positioned in a certain way before I try to install the transaxle?

Should the fork be positioned parallel to the throw out bearing before installing the transaxle or should it be perpendicular to the throw out bearing before trying to slide the trans on?

[Nditiz1]

Originally Posted by Diggem

How should the fork be positioned when sliding the input shaft into the clutch? Is the fork supposed to be positioned in a certain way before I try to install the transaxle?

About a 45 angle maybe a little more towards the outside. You need to get the bearing close enough that you can get the fork into the channel. Once in place if you slide the trans and engine close you will see the fork move more into the channel. At that point your are probably ok to mate the two flush.

[Diggem]

So I should just focus on getting the input shaft splines inside of the clutch plate and the clutch fork will just push itself into position over the throwout bearing?


I shouldnt have to try and move the clutch fork around through the starter hole?

[walt]

It won't push itself in you need to guide it. Just hold the shaft and turn slightly as you push the transmission on. Very easy just watch thru the port on the top side. Use just a slight amount of grease on the tips of the fork. If you pulled your clutch did you use an alignment tool to center the clutch disc..

[Diggem]

Originally Posted by walt

It won't push itself in you need to guide it. Just hold the shaft and turn slightly as you push the transmission on. Very easy just watch thru the port on the top side. Use just a slight amount of grease on the tips of the fork. If you pulled your clutch did you use an alignment tool to center the clutch disc..

Definitely used a alignment tool and that is not a concern as the tool slides in perfectly. I am just wondering how that fork gets on the throwout bearing.

[47silver]

I removed the clutch lever. Slowly slid transmission onto engine. At a certain point the pins on the fork start to line up with the throw out bearing. Look in hole on top on top of transmission to verify pins are on bearing. Mine lined ip and i mated them together.