Casting #464697
General Motors Casting Number 464697 Clutch Housing
The Chevy "697" is a 168 tooth aluminum bellhousing,
and like its little brother the"606", Chevrolet
manufactured 2 versions.
Version #1 as near as I can tell was a replacement
to the 3899621. In fact, "621" is cast on the clutch
fork stud boss.
Version #2 is specific to the 1978-87 A & G body,
has "697" cast into the stud boss, and can
only be used with GM part #14007356 or part
#462607 clutch release forks.
Front View
This picture looks nearly identical to the "621" and
"444" bellhousings.
Part Number Casting
The example I own has the part number is lightly
cast with the middle 4 sitting atop a bump.
Did this mold make the "469697" before being modified?
This picture also shows date code circles and mold
number 4.
Top View
GM is cast above the transmission mounting flange.
Fork Side
This is the driver-side view and shows the clutch
release fork hole.
The hole is in the same location on both versions.
Engine Stud Hole
This hole is not used on A & G Body cars. But
is present on GM Casting #3899621 housing.
Passenger Side
This view shows the starter bump that is typical of
all Chevrolet 168 tooth aluminum Bellhousings.
Inside
Here you can see that the clutch fork ball stud is
in the lower half of the stud boss.
2 TYPES
464697 (G Body) 464697 (621)
The differences between the two versions are hard to see from outside pictures. The fork ball stud on
the bellhousing to the left is lower than on the housing on the right.
Inside Part # 697 Inside Part # 621
This housing on the left is specific to 1978-87 A & G body cars. The housing on the right is the GM
replacement for part number 3899621.
Applications
464697
0.683 HOUSING, Clutch
78 A (350) W/M.T. (Chevy Parts Book)
This translates to: 1978 A bodies With 350 cubic inch Chevy engine and Manual Transmission.
Quick Reference
Size: 168 tooth flywheel
Material: Material
Engine Bolt Pattern: Chevy
Transmission Bolt Pattern: GM
Transmission to Bellhousing Threads: 1/2"-13
Center Hole Size: 4 5/8"
Fork Ball Stud Threads: 13/16"-16
Inspection Plate Bolt Threads: 1/4"-20
Face to Face Measurement: 6 5/16"
Starter Mounted: No
Starter Nose: Round
Z-bar Mount: Drilled Hole for Engine Stud (may already be tapped 1/2"-13)
Note: all measurements are approximate.
Disclaimer:
Factory correct applications are your responsibility.
GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing.
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 and 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!
