10 splines are at least twice as deep, so the effective diameter should be comparable. Totally disagree about strength. It's virtually impossible to damage a 10 spline clutch disc once you're in them. The input shaft either moves, or it comes to a screeching halt. None of this folding and deforming of the splines that has caught me twice. I obviously respond better to thick pieces of metal, not thin. Received a flame mail that fine splines are standard issue on imports. Need I say more? BTW: I have been struggling with this transmission all by myself. People promise you the earth, moon and stars, but when time comes to lay on your back in the driveway they disappear rapidly. Don't worry -- they reappear just as quickly afterwards to press your botched clutch disc off the input shaft. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote: > I would hazard a guess that using smaller (and therefore shallower) > splines makes the effective diameter (that traced by the base of the > splines) of the shaft larger, and therefore stronger. Also, the > "strength" of each spline will be increased in proportion with the > number of splines. > > Really early DeLoreans, in the pre 1000 vin range have early 10-spline > Renault clutches. I thought the newer ones were 21 spline. Could be > wrong though, not got one to hand, and never really bothered counting them! > > Martin > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/