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Posted by newTSIguy, Mar 1, 2009
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.
Standing procedure for replacing a clutch on a manual transmission. The input shaft of the transmission should be lubricated before installation in the vehicle. Excessive amounts of grease should not be used.
this stuff but in a 1lb can)and I use it on all my bushings, wheel bearings, axle splines and the trans shaft.
You do NOT use any sort of lubricant on the Input Shaft Splines. This can cause premature wear or spline damage. (This is what I see when I pull transmissions apart regularly).
The Factory Service Manual does recommend using a small amount of multi-purpose grease on the clutch disk splines and to use a brush and work it into the splines, then to remove any excess grease from the hub. If you use it, please, only use a very small amount.
The clutch is not going to sieze to the input shaft unless you are keeping your inspection plate off the car and going through lakes, submerging the clutch assembly in water, or driving in winter through salt and snow with the plate off.
Page 6-3 in "Lubricants" and 6-21 "Service Points of Installation" #2 of:
http://lilevo.com/mirage/89 Colt Summit Mirage Turbo Factory Manual .PDF/6 - Clutch.pdf
This is out of the manual for '89 Turbo Colts. Page 6-3 lists the lubricant used. #2 of SPOI tells the technician to lubricate the clutch disc splines and input shaft splines. Whether you lube one or the other or both the same thing is achieved: there is grease on the input shaft and clutch disc splines.
Page 6-3 in "Lubricants" and 6-18 "Application of Grease to Clutch Disc/ Clutch Cover Assembly" #1 of:
http://lilevo.com/mirage/90-91 Talon Laser Vol 1 EngChasBody Service Manual .PDF/90-91ECB.PDF
This is the ECB manual for 1g's. Page 6-3 lists the lubricant for the clutch disc splines. The other item tells the technician to brush grease onto the clutch disc splines. Now this is not the input shaft to the transmission but it would be splitting hairs to say that greasing the input shaft is incorrect because if there is grease on the clutch disc splines then it will certainly be on the input shaft.
Unfortunately lilevo's 2g manual is not complete and I cannot provide a link for scanned images of the clutch service procedure for a 2g clutch. I have a '89 Colt. The OP has a '92 Talon. According to the manuals from the factory the input shaft/clutch disc splines are to be greased on mine and the OP's vehicles.
I know Jason Tanin well, as well as his cars since he lives close by me and have been around long enough to remember the original lilevo he put together.
I will read them right now. As for the rest of the service manuals, I have many in .pdf form, so I will check. I did not have the 1989 Colt turbo FSM, so thank you!.
Yes, I can see that these FSM's tell you that, and I went back to my other FSM's concerning DSM's and they ALSO state to use a multi-purpose grease and to put a small amount on the clutch disk splines and to use a brush and work it into the complete portion of the splines. It also recommends to remove any excess grease.
Thank you for correcting me.
You can take that however you want. The sliding of a clutch disc on an input shaft is going to be the same action no matter the year of the car, there is going to be constant contact and friction between two steel surfaces. Unless I find or am shown somewhere in an FSM that we are to not grease these points of contact I am going to continue greasing them.
That is fine.
I guess that I have my transmission off the car more regularly than most DSM'ers...
Yeah. 95% of DSM'ers aren't slamming down 740whp running 9's.
This may be specific to Quartermaster twin disc clutches and it may not just sharing the info.
Running a dry shaft isnt a good thing
As this is the procedure I always follow. If you have a car with alot of HP, running a twin disk clutch, or are pulling your transmission regularly, you should have absolutely no issues with the clutch disk hub splines siezing to your input shaft. Just be sure to keep the input shaft splines clean and inspect them for wear and straightness.
If they are worn, or out of straight, they will destroy any clutch that is put on it sooner or later.