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Top Sellers

55-62 Chevy Bellhousing Cover Set (R)
55-62 Chevy Bellhousing Cover Set (R)
$61.92
55-62 Chevy Bellhousing Pan
55-62 Chevy Bellhousing Pan
$90.00
#3734908 Starter Shield (NOS)
#3734908 Starter Shield (NOS)
$80.00
55-72 Chevy Truck Bellhousing Cover Set
55-72 Chevy Truck Bellhousing Cover Set
$100.00
Chevy Engine Bellhousing Cover Bolt Kit (Slotted)
Chevy Engine Bellhousing Cover Bolt Kit (Slotted)
$2.50

New Releases

1965-66 GTO  Shifter Assembly
1965-66 GTO Shifter Assembly
$550.00
(NOS) GM #9795915 Shift Cable Bracket
(NOS) GM #9795915 Shift Cable Bracket
$25.00
65-66 Pontiac B Body 4 Speed Steering Column
65-66 Pontiac B Body 4 Speed Steering Column
$185.00
  1. Home
  2. GM PARTS SEARCH
  3. Inspection Plates
  4. 3704923 55-64 Chevy Engine 2 Piece Underpan

3704923 55-64 Chevy Engine 2 Piece Underpan



General Motors Part Number 3704923 Underpan


The Chevrolet and GMC part number 3704923 is
the lower cover or pan of the two piece clutch
bell housing cover.


Reproduction Car Set
The Part # 3704923 is the cover at the top in
picture above. The "923" fits both early car and
truck bellhousings.


Outside
This is the outside of a new GM part. The paint is
shinier than the aftermarket part.


Inside
In this view you can see the drain hole at the bottom
and get a sense of the depth needed to inclose the
flywheel and clutch assembly.


Part #3704923
The example I have has the part number sticker
the inside.


On "553"
 In this picture I have a reproduction pan mounted
on a part # 3779533 aluminum bellhousing. This
is a "true" inspection plate as it can be removed
by loosening  four (4) bolts and removing one (1).



I have personally tried this cover on the following bellhousings.
3704922
3779553


Clutch cover applications should be used as a guide to the type of bellhousing used originally used on a vehicle.
Covers should be bought to fit the bellhousing you have.
 

Applications
3704923
0.679 UNDERPAN, Clutch flywheel (15 1/2" O.L.) (Note 1)
55-62 Pass., Corvette (8 cyl.) (exc. A.T.) (Chevy parts books)
63      Pass. (409) (Chevy parts books)
64      Taxi (230)(2nd Design) (Chevy parts books)
Note 1: Has two indented throughs on surface, trim excess metal to fit as necessary.



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!


Parts For Sale [6]

55-62 Chevy Bellhousing Cover Set (R)
55-62 Chevy Bellhousing Cover Set (R)
In Stock
$61.92
Add To Cart
55-64 Chevy Starter Shield (R)
55-64 Chevy Starter Shield (R)
Sold Out
$25.50
55-62 Chevy Bellhousing Pan
55-62 Chevy Bellhousing Pan
Sold
$90.00
55-72 Chevy Truck Bellhousing Cover Set
55-72 Chevy Truck Bellhousing Cover Set
Sold
$100.00
Chevy Engine Bellhousing Cover Bolt Kit (Slotted)
Chevy Engine Bellhousing Cover Bolt Kit (Slotted)
Sold Out
$2.50
#3734908 Starter Shield (NOS)
#3734908 Starter Shield (NOS)
In Stock
$80.00
Add To Cart
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