#15990013
General Motors Clutch Housing Casting #15990013
Used OEM
Pictures, descriptions and measurements are from
an original used GM part.
Bottom
In this picture you can see the ridge that identifies
this as a 168 tooth flywheel housing that accepts a
12" clutch assembly. You can also see the clutch
fork ball stud grease fitting, and the two M10 x 1.5
threaded castings for bracing.
Passenger Side
The squared off casting to the left is for the clutch
release fork. The hole at the top of the casting is
used as a weep hole for clutch fluid.
Top
The top of this housing looks typical of Chevy
aluminum clutch housings.
Driver Side
Transmission Mounting
The four holes are threaded M12 1.75 with the
top two holes 10" apart, the bottom holes down
4 3/4" and 10 5/8" apart.*
The center hole is about 5 1/8".*
*Measurements were taken with a measuring tape
and are therefore approximate.
Inside
Closeup Inside
Casting Number
Casting Number
Applications
15990013
0.683 HOUSING, Clutch
I don't have any parts books that list this number.
Disclaimer:
Most parts that I describe and picture, have identification on or with them, others I can identify from other sources and deduction (educated guess).
Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Applications are for replacement parts that were available at the time of parts book printing, and when possible model specific assembly manuals.
My observations come from the parts I have in my collection or other reliable sources your parts may differ.
If Factory correctness is your goal, do more research, join car clubs, forums and buy an assembly manual if one is available for your Project Car (you wont be sorry).
This is a fun and interesting part of the hobby!
