#3887177 64-81 Corvette
General Motors Part Number Clutch Release Fork
The "177" fork is a 1964-1981 Corvette lever.
The Part # 3887177 Fork is approximately 10 3/8",
from tip of bearing retainer end to center of push rod
pin hole. And has a wide beam were it passes through
the bellhousing.

I am taking measurements from a New old stock
Clutch Release Lever.

The arch is approximately 1 7/8" at it's highest point.

There is a 3/8" x1/8" slot for a return spring,
and a 1" x 1/4" slot for the lower push rod.

The spring is a standard Part # 3849698.

Push Rod Pin Hole
The corvette clutch pedal push rod is attached
using pin part number 3738054.
Applications
3887177
0.795 FORK, Clutch release
64-81 Y
Y= Corvette
History:
3844493 use 3887177 02-67
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,
forums and buy an assembly manual if one is available for your Project Car (you won’t be sorry).
This is a fun and interesting part of the hobby!
from tip of bearing retainer end to center of push rod
pin hole. And has a wide beam were it passes through
the bellhousing.
I am taking measurements from a New old stock
Clutch Release Lever.
The arch is approximately 1 7/8" at it's highest point.
There is a 3/8" x1/8" slot for a return spring,
and a 1" x 1/4" slot for the lower push rod.
The spring is a standard Part # 3849698.
Push Rod Pin Hole
The corvette clutch pedal push rod is attached
using pin part number 3738054.
Applications
3887177
0.795 FORK, Clutch release
64-81 Y
Y= Corvette
History:
3844493 use 3887177 02-67
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,
forums and buy an assembly manual if one is available for your Project Car (you won’t be sorry).
This is a fun and interesting part of the hobby!