Casting #3858403 153 Tooth Chevy
The Chevrolet Part 3858403 # Clutch Housing
The Chevy "403" is an aluminum 153 tooth bell
housing with a 4 5/8" center hole. This makes it
compatible with all GM car 4 speeds (Muncie,Saginaw,T-10),
except the truck SM 465 and the 1963 small bearing
retainer transmissions. According to the 1967-75
Chevrolet Parts Catalog this is the only Clutch housing
listed for the 302 cubic inch engine (69 Z-28 Camaro).
Yet the I.D. number is 3840383.
Front View
This example has the Z Bar stud bosses molded in
on both sides with the drivers side drilled and tapped.
Part # and Engineering Codes
The part number 3858403 and engineering codes
are on the unused clutch fork knock out.
Clutch Fork Hole Side
This example has a z-bar stud boss on drivers and
passenger sides with the drivers side drilled and
taped and a stud in it. I've had "403"s with the stud
boss on the driver's side only.
Starter Side
The above view shows the passenger side Z-bar
stud boss and the straight starter side typical of
153 tooth flywheel Bells.
See Chevy Bellhousings
Inside View
This casting could be used on right or left hand
drive vehicles.
The Chevrolet parts manuals that I have are dated after 1980 and ALL 3858403 part numbers are followed by this notation ( IDENT. NO. 3840383 ). I was under the impression that the "383" bellhousing was the earlier model. To add to the confusion, the bell 462606 has 383 cast on the clutch fork ball stud boss of some bells.
Applications per the 1967-1975,1976-1981(July 1986) Chevrolet parts catalogs and 1953-1981(Nov.1981) Corvette parts catalog.
0.683 Housing Assy., clutch (ident.No. 3840383) (note 1)
note 1 : Less ball stud
69 | Chevy,Chevelle,Camaro w/ reg. fuel(350) | |
69 | Pas.(350 w/ reg. fuel)(exc. Taxi,Police,H.D, clutch) | |
69 | Chevy,Chevelle,Camaro w/ reg. fuel(327) | |
67-68 | Camaro(327) | |
65-68 | Chevelle(327)(exc. H.D. clutch) | |
64-69 | Pass. w/ reg.fuel (327)(exc.Taxi.Police,H.D. clutch) | |
70-73 | All(307) | |
68 | Chevy(307) | |
68 | Chevelle(307)(exc,H.D. clutch) | |
68 | Pass.(307)(exc. Taxi,Police,H.D. clutch) | |
67-69 | All(302) | I.D, #3840383 |
65-67 | Chevelle (283)(exc. H.D. clutch) | |
64-67 | Pass.(283)(exc. Taxi.Police,H.D. clutch) | |
75 | Nova(262) | |
73-75 | All (6 cyl.) | |
70-72 | All (6 cyl.)(exc. Taxi, Police) | |
69 | Chevy, Chevelle, Camaro(230.250) | |
68 | Chevy(6 cyl.) | |
64-68 | Chevelle, Camaro,(6 cyl.) | |
64-69 | Pass. (230.250)( exc. Taxi, Police, H.D. clutch) | |
69 | Pass. (350 w/reg. fuel) (exc.Taxi, Police, H.D. Clutch) | |
69 | Chevy, Chevelle, Camaro w/reg. fuel (350) | |
76-77 | A (250) W/M.T. | |
76-79 | F (250) W/M.T. | |
77-79 | B (250) W/M.T. | |
78-78 | X (250) W/M.T. | |
80-81 | F (229) W/M.T. | |
64-68 | Y (327,396) | |
66 | Y (427) W/SP. H/PER. | |
67-69 | Y (427) W/H.D., AL.CYL. and Case | |
68-70 | All(153) |
A= Malibu
B= Fullsize
F= 67-81Camaro, 69-72 Nova
X= Nova
Y= Corvette
Pass.= Fullsize
Chevy= 62-68 Chevy II / Nova
* This catalog can be confusing. All = all cars with that engine available and all vehicles covered by this catalog.
Applications per the Thru 1975 Oldsmobile Parts Catalog
(*1) NOTE : When installing this housing also order one 3729000 stud listed in Group 0.796.
66-74 | L6 S.T. (*1) |
75 | All X S.T. |
Applications per the Thru 1975 Buick Parts Catalog
68-71 | L-6 Eng. C.T. |
Applications per the Thru 1975 Pontiac Parts Catalog
70-74 | All 250M |
71-72 | X/307 |
75 | All 250 3 spd.-M.T. |
Applications per the1976-81 Oldsmobile Parts Catalog Effective July,1987
76 | ALL(250) W/3 SPD |
Applications per the 1973-78 Truck Parts Catalog, Effective February,1985
73 | G-1,2 (exc.H.D. Clutch) |
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!