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Top Sellers

(R) 3993851 Clutch Fork Boot
(R) 3993851 Clutch Fork Boot
$9.75
(New OEM) 14007355 Fork Boot
(New OEM) 14007355 Fork Boot
$14.33
Transmission to Bellhousing Bolts
Transmission to Bellhousing Bolts
$4.99
Bellhousing to Engine Bolts
Bellhousing to Engine Bolts "M" Head (R)
$7.95
(R) 14007355 Fork Boot
(R) 14007355 Fork Boot
$8.00

New Releases

(NOS) GM #9795915 Shift Cable Bracket
(NOS) GM #9795915 Shift Cable Bracket
$25.00
55 Chevy Clutch Fork Push Rod Kit (OEM)
55 Chevy Clutch Fork Push Rod Kit (OEM)
$80.00
62-63 Impala Clutch Fork Push Rod
62-63 Impala Clutch Fork Push Rod
$75.00
  1. Home
  2. GM PARTS SEARCH
  3. Clutch Housings
  4. Buick, Olds, Pontiac Engines
  5. 547975 3 Versions

547975 3 Versions


General Motors Casting Number 54975 Bellhousing


  The "975" is an aluminum bellhousing for B.O.P.
(Buick, Olds and Pontiac) engines.

 Warning : I have found at least 3 different versions
of casting #547975 clutch housing.
 I have one version that is identical 
(except for the casting number)
to the 9785581 and 977822 clutch housings.

Another version has the "peanut" ball stud boss
with the upper area tapped (standard B.O.P.).

And yet another version has the "peanut stud boss
tapped in the lower area (78-87 A & G Body)

 

     Transmission View
    In this picture you can see the two starter housing (ears),
 which allows it to fit Buick, Pontiac and Oldsmobile
engines. And the extra holes for Ford transmissions.
.

     Part # 1
    Some versions have the casting number that is cast
into the drivers side starter "ear".

Part # 2
Some versions have the casting number that is cast
into the drivers side, under the z bar mounting
bracket holes.


     Top
    The "V" at the top of the casting is another B.O.P.
identifier.


   Fork side
The fork hole is the standard (Approximatly 3" x 2 1/4")
size.


  Bottom
    This bell takes the same type of,
 one piece sheet metal clutch inspection cover as
the "581" and "882" clutch covers,
that is held in place by three 5/16"-18 bolts.


      Passenger Side View


     Clutch Side Version 1
    Here you can see the two starter "ears" and the
engine mounting flange, with six clearance holes
for bolts and two dowel holes.


    Inside View Version 1
    This picture reveals the fork mounting stud location
and beefy reinforcements around all mounting holes.
Notice: The single stud mounting boss.

Clutch Side Version 2
All mounting holes are the same for all three
versions.

Inside View Version 2
This version has the double stud boss with the
tapped hole in the upper area. This makes it a
replacement for casting #9785581.




Quick Reference
Size: 166 tooth flywheel
Engine Bolt Pattern: Buick, Olds, Pontiac
Transmission Bolt Pattern: GM and Ford
Transmission to Bellhousing Threads: 1/2"-13
Center Hole Size: 4 5/8"
Ballstud Threads: 13/16"-16
Inspection Plate Bolt Threads: 5/16"-18
Face to Face Measurement: 6 5/16"
Starter Mounted: No
Starter Nose: Dual
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, 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 [20]

Pontiac Bellhousing Kit
Pontiac Bellhousing Kit
Sold
$215.00
Black Clutch Bellousing to Engine Bolts
Black Clutch Bellousing to Engine Bolts
Sold Out
$11.95
(OEM) 64-81 B.O.P. Bellhousing
(OEM) 64-81 B.O.P. Bellhousing
Sold
$190.00
BOP G Body Bellhousing
BOP G Body Bellhousing
Sold
$195.00
(R) 3993851 Clutch Fork Boot
(R) 3993851 Clutch Fork Boot
In Stock
$9.75
Add To Cart
(New OEM) 14007355 Fork Boot
(New OEM) 14007355 Fork Boot
Sold Out
$14.33
(R) 14007355 Fork Boot
(R) 14007355 Fork Boot
Sold Out
$8.00
Pontiac / Olds Bellhousing Inspection Plate
Pontiac / Olds Bellhousing Inspection Plate
Sold Out
$35.00
Buick Inspection Plate (R)
Buick Inspection Plate (R)
Sold Out
$41.00
BOP Bellhousing Inspection Plate Bolt Kit
BOP Bellhousing Inspection Plate Bolt Kit
In Stock
$4.50
Add To Cart
BOP Bellhousing Dust Plugs
BOP Bellhousing Dust Plugs
Sold Out
$2.99
#3729000 Ball Stud (New OEM)
#3729000 Ball Stud (New OEM)
Sold Out
$8.75
Adjustable Fork Ball Stud
Adjustable Fork Ball Stud
Sold Out
$23.98
Bellhousing to Engine Bolts
Bellhousing to Engine Bolts "M" Head (R)
Sold Out
$7.95
Bellhousing to Engine Bolts
Bellhousing to Engine Bolts "A" Head (R)
Sold Out
$10.50
Transmission to Bellhousing Bolts
Transmission to Bellhousing Bolts
Sold Out
$4.99
(OEM) #9787069
(OEM) #9787069
Sold
$100.00
(R) #9787069 Clutch Release Fork
(R) #9787069 Clutch Release Fork
Sold Out
$62.50
(R) #3892632 Clutch Fork
(R) #3892632 Clutch Fork
Sold Out
$59.95
(New OEM) 3892632 Clutch Release Fork
(New OEM) 3892632 Clutch Release Fork
Out of Stock
$52.00
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