I've having a lot of trouble getting the splines of the transmission to mate with the clutch. Is there any tricks to make this easier? I've done this job before (on this Fiero, and on other cars) and never had much issue. It seems the new clutch I bought fits a bit "tighter" on the transmission input shaft.

I've made a couple alignment pins from bolts to help guide the transmission into place but still cannot get the two to mate.

Thanks all. 3500 V6 + 5-speed Getrag.

the clutch centered with the plastic/dumbie inpit shaft??
did you check the clutch to make sure it slide onto the input shaft?? just because it was in a box with a part # for that app. doesn't mean it was the correct part..

Yeah I used the clutch alignment tool, and I did remove the clutch disc and make sure it slides onto the input shaft.

It fits, but is pretty tight. has to be lined up just perfect, much more so than my old clutch disc.

I have run into that before, had to VERY lightly file the splines on the disk to get it to slide smooth on the input shaft.

I did what you suggested and lightly filed the splines on the clutch. It went together on the first try in literally less than 5 minutes.

Thanks for the tip!

For others, it helped a lot to make some guide pins out of M12 bolts. I cut the heads off with a band saw and threaded a couple into the engine, so when the transmission is being pushed into place, its not just hanging off of the clutch splines.