did our year of trucks come with a 10" clutch - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dubie · 11-13-2003, 06:54 PM

I'm sure my engine is stock and has a 10" clutch, but I was just told different. A guy at another parts store I just called, told me that the inline 6 in a full size half ton used 11" clutches, not 10. Can anyone comfirm that a 10" clutch is in fact stock in these trucks

*67Fleetsidedream* · 11-13-2003, 07:27 PM

I had the 327-3 on the tree in my truck and it came factory with a 11in clutch with a 12in flywheel. I wouldn't think that it would be different if the engine was a I6.

mikeoj · 11-13-2003, 08:13 PM

Just replaced my stock 10 in clutch in a 70 C10 6cyl 3spd.Napa told me 10 in cost more because everyone replaces them with 11 in.Mike

Class of 69 · 11-13-2003, 08:53 PM

Stock clutch is 10" 11" was a Heavy duty option on small V8, and standard with most 4 speeds. If the flywheel is big enough, and drilled for the 11" put it in. You will never regret it!!

TODDS 72 · 11-13-2003, 09:48 PM

i checked mine today and its a 10 inch

fast_dev · 11-13-2003, 10:53 PM

my stocker was a 10 also, replaced it with a new 10" and it lasted about a month and fell apart, replaced it with an 11", no more troubles after that.

Pont · 11-14-2003, 12:46 AM

Not sure what mine came with originally, but I would guess that it was an 11". When I recently replaced my clutch, my parts guy pulled an 11" and had it sitting on the counter when I went to pick up the new parts. However, when someone did the big block swap in my truck, they put a 12" setup in it. I'm happy with the 12".

boilrman · 11-14-2003, 04:03 AM

when I rebuilt my I6 I replaced the clutch beings it was open and accessable. It was an 11".

**'68OrangeSunshine** · 11-14-2003, 05:39 AM

My '68 C/10 stepside came optioned w/292 L6, SM465 4-speed and 11" clutch.

JJR · 11-14-2003, 09:53 AM

I know the standard clutch for a 250 is 10". My 70 C-10 with a 250 came with the heavy duty clutch option which is 11" for a 250. I was under the impression that V-8's came standard with an 11" clutch and a heavy duty clutch was a 12". As noted above if you have an 11" clutch you can upgrade to a 12" using the same flywheel. Hollanders only shows one flywheel for V-8 applications which is the 11"/12" clutch. The V-8 flywheel (used on most Chevy truck and cars to about 1985) is the same one used on the 250 with heavy duty (11") clutch.

chaptr2 · 11-14-2003, 05:38 PM

My old 71 with a 307/4-speed was 11", my 72 Blazer/4-speed is a 11", and my 70 GMC was a 11" all were factory. In 1993 I bought a lifetime warranty clutch from a national parts chain and have used the same receipt for all my trucks. They have all been the same 11 inch clutch.

dubie · 11-14-2003, 06:10 PM

FINALLY found a 10" clutch kit. I swear to god that it must be a bastard clutch size up here.

I have a clutch kit on it way over night to me, so I can install it tomorrow morning. I am using a replacement 10" to put on my 350, since it's just a summer cruising truck, i don't need anything heavy duty.
Oh and it's cost me $50 less than the 11" that I was sold

11-13-2003, 06:54 PM	#1
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	did our year of trucks come with a 10" clutch I'm sure my engine is stock and has a 10" clutch, but I was just told different. A guy at another parts store I just called, told me that the inline 6 in a full size half ton used 11" clutches, not 10. Can anyone comfirm that a 10" clutch is in fact stock in these trucks __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

11-13-2003, 08:13 PM	#3
mikeoj Senior Member Join Date: Nov 2000 Location: WI,USA Posts: 495	Just replaced my stock 10 in clutch in a 70 C10 6cyl 3spd.Napa told me 10 in cost more because everyone replaces them with 11 in.Mike __________________ 69 Lwb C-10 402/700R4 70 Lwb C-10 250/3pd Wisc.

11-13-2003, 08:53 PM	#4
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Stock clutch is 10" 11" was a Heavy duty option on small V8, and standard with most 4 speeds. If the flywheel is big enough, and drilled for the 11" put it in. You will never regret it!! __________________ 69 GMC K10 ..some restoration required....still..

11-13-2003, 09:48 PM	#5
TODDS 72 Not the nightly winner Join Date: Jul 2002 Location: CHARLEMONT MA.USA Posts: 763	i checked mine today and its a 10 inch __________________ 72C10SWB BLUE 350/350 86K10LWB BLUE 5.7 700r4 7.5' fisher plow 93S10XCAB4X4 BLUE 4.3 4L60e 69gmc c10 v8 3 on the tree yellow 72k10 swb 350 3 on the tree green 86k15 swb5.0L 4spd brown

11-13-2003, 10:53 PM	#6
fast_dev Registered User Join Date: Dec 2000 Location: Ringtown,PA Posts: 555	my stocker was a 10 also, replaced it with a new 10" and it lasted about a month and fell apart, replaced it with an 11", no more troubles after that. __________________ 68 chevy 406 small block, budget drag racer, new best e.t 11.91 @112 67 nova numbers matching 327 4 speed 13.6 @ 102mph 70 longhorn c-30 402/4 speed 70 c-10 swb 402, muncie 4 speed 94 s-10 350/th350 3:73 posi 71 c-20 402/th400 towrig for racetruck. 72 4wd lifted on 35's 72 350/3 speed winter beater

11-13-2003, 07:27 PM	#2
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	I had the 327-3 on the tree in my truck and it came factory with a 11in clutch with a 12in flywheel. I wouldn't think that it would be different if the engine was a I6.

11-14-2003, 12:46 AM	#7
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	Not sure what mine came with originally, but I would guess that it was an 11". When I recently replaced my clutch, my parts guy pulled an 11" and had it sitting on the counter when I went to pick up the new parts. However, when someone did the big block swap in my truck, they put a 12" setup in it. I'm happy with the 12". __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"

11-14-2003, 04:03 AM	#8
boilrman 70 Chevy 3/4t Join Date: Sep 2000 Location: Kokomo,IN USA Posts: 1,230	when I rebuilt my I6 I replaced the clutch beings it was open and accessable. It was an 11". __________________ Find a job you love and you'll never have to work a day in your life. 1998 Yamaha V-Star 650 1970 Chevy 3/4t, I6 (rebuilt), 4 speed Kokomo,IN

11-14-2003, 05:39 AM	#9
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	My '68 C/10 stepside came optioned w/292 L6, SM465 4-speed and 11" clutch. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 11-14-2003 at 05:46 AM.

11-14-2003, 09:53 AM	#10
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	I know the standard clutch for a 250 is 10". My 70 C-10 with a 250 came with the heavy duty clutch option which is 11" for a 250. I was under the impression that V-8's came standard with an 11" clutch and a heavy duty clutch was a 12". As noted above if you have an 11" clutch you can upgrade to a 12" using the same flywheel. Hollanders only shows one flywheel for V-8 applications which is the 11"/12" clutch. The V-8 flywheel (used on most Chevy truck and cars to about 1985) is the same one used on the 250 with heavy duty (11") clutch. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

11-14-2003, 05:38 PM	#11
chaptr2 Registered User Join Date: Mar 2000 Location: Olalla, WA Posts: 705	My old 71 with a 307/4-speed was 11", my 72 Blazer/4-speed is a 11", and my 70 GMC was a 11" all were factory. In 1993 I bought a lifetime warranty clutch from a national parts chain and have used the same receipt for all my trucks. They have all been the same 11 inch clutch. __________________ This is only my opinion and it is subject to change. 70 GMC Short box stepside Blown 388 Stroker 72 K/5 Blazer 350/SM465/205

11-14-2003, 06:10 PM	#12
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	FINALLY found a 10" clutch kit. I swear to god that it must be a bastard clutch size up here. I have a clutch kit on it way over night to me, so I can install it tomorrow morning. I am using a replacement 10" to put on my 350, since it's just a summer cruising truck, i don't need anything heavy duty. Oh and it's cost me $50 less than the 11" that I was sold __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

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