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View Full Version : trans id + need a clutch

usp55
06-21-2009, 10:55 AM
71 firebird that came with a 3speed. before I pu the trans back in i want to put in a new clutch. These are the casting i was able to pull of the trans, can anyone tell me what i have.

gm34
3925647
1817 1

886m
38782888

also i have never dealt with a manual trans nor buying a clutch. if anyone can point me in the right direction i would really appreciate it.
Featherburner
06-21-2009, 02:05 PM
I don't know which it is but it should be either a Muncie M12 or M13.
BonzoHansen
06-21-2009, 08:00 PM
Dr Google tells me 3925647 is a Saginaw 3-Spd

A stock replacement clutch is probably fine. I see Delco kits around $110. Looks like there are some variations so I hope you still have your old stuff.
usp55
06-21-2009, 09:02 PM
I don't know which it is but it should be either a Muncie M12 or M13.

should be but its not, upgrade sometime in the future but for now it will do just fine.


thanks bonzo, just wanted to make sure. Yea i do have my old clutch. Can u post where or pm me where u are looking.
BonzoHansen
06-21-2009, 09:06 PM
I just looked it up at rockauto.com
usp55
06-21-2009, 09:19 PM
I just looked it up at rockauto.com

thanks. and the what should i look at from my old clutch to make sur ei get the correct one. It was just a plate and two disks, what should i measure. Sorry if these questions seem really basic info to u guys but i have never dealt with clutches so im trying to learn somethings from scratch.
BonzoHansen
06-21-2009, 09:34 PM
I'm not 100% sure the difference between Raised Diaphragm and Flat Diaphragm. Someone smarter then I in these things will probably pipe in. Maybe Josh.

Buy it local, maybe at your local Napa, that way if it is wrong returning it is easier.
BonzoHansen
06-23-2009, 08:14 PM
On the Luk site, I see this:

LuK RepSet 04-002
Application 1971 Pontiac Firebird - 8 Cylinder, 350"
Description 3-Spd, 2Bbl
Disc Specifications
Outside Diameter 10 3/8"
Spline 1 1/8"
Teeth 10
Flywheel Type - Flat

http://catalog.schaeffler-aftermarket.us/detail.phtml?make=Pontiac&model=Firebird&year=1971&engine=350%22&repset=04-002&id=854825&query_displacement=350%22&qualfier=
usp55
06-24-2009, 06:51 AM
Im just gona go up to napa on saturday and bring my old one like u said. engine is out of a 73 (400) trany is from who know when or where, but is a saginaw 3 speed. hopefully they can match it up. thanks for the help
WildBillyT
06-24-2009, 07:54 AM
If it has all 3 "tabs" on the side cover then it's a Saginaw.