wozzoom

I'm in the middle of a clutch job on my 89 GTUs. I'm looking at the front input shaft on the transmission and there appears to be a bit of play in the shaft. What is the allowable limit of input shaft play? Is there a bearing on the input shaft that can be easily replaced? (IE: Without rebuilding the entire transmission.)

thanks

gcooper9

I was pondering this a couple of weeks ago when I was doing a clutch job. The direct answer (as best I could determine at that time) is yes, but you need a special puller to get the old bearing out. I also notice the "play" at the end of the input shaft but then I thought this end is supported by the in the center of the eccentric shaft when the trans is installed so I decided to leave well enough alone. I did however install a new seal for the input shaft and a new seal in the rear of the trans and a new seal for the encentric shaft and a new pilot bearing and pilot bearing seal. A couple of hints if you are installing a new pilot bearing-- after forcing new grease into the cage, put the bearing in a zip lock and put it in the freezer to make the diameter smaller, this make it easer to press it int the eccentric shaft. Use the proper size deep well socket to help press it into the shaft. Use a new pilot seal. Here is something else I struggled with and what I did. I wondered how much beaing grease was enough (to much). When I put the clutch cenering tool in the pilot bearing I realized the it acted like a piston in a cylinder and I could push it in only part way and the air pressure would then push it back aout some of the way. So, I used a dremel with a cut off blade to make a shallow grove in the centering tool to allow air and EXTRA GREASE to escape. Seems to have worked well.
Did you resurface the flywheel?
I used the racing beat flywheel puller this time (last time I spent a week trying different techniques to get the flywheel off. This time, it only took about 10 minutes after I got the huge nut off.
I apologize if this is more info than you needed.
Later on,
Rick

Thaniel

There is going to be a little play in it but it should run smooth. If it runs rough it is bad. If it is bad then most of the bearings in the transmission are probably bad. But if you want to get the input shaft bearing off without opening the entire case you can. Pull the bolts that hold the cover on the front of the trans and you'll see the bearing there clear as day. Just a matter of using a bearing puller and pulling it. Putting on the new one would be much harder as you will have to press it on the input shaft and case at the same time. Now that I think about it I wouldn't recommend it. Just open the case and do it right.

wozzoom

That was the impression that I was getting from reading the shop manual. The transmission in question actually shifts very well and currently has no vibration problems. I just wanted to see if the input shaft play was normal since there is no mention of tolernaces anywhere.

Thanks for the help.