Stock gears??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

novajess1972 · 11-13-2006, 09:19 AM

Can anyone tell me what the stock gears are in a 1972 C-10 2wd?

Huck · 11-13-2006, 11:12 AM

Rear gears were different depending on transmission, engine, and you could get optional gears. Look on glove box door--might help. A 72 C10 2wd V8 auto----would usually be 3.07 ----a 4 speed would be 3.73. Now that's the most common build. A 6cyl auto or 3 speed could be very different.

novajess1972 · 11-13-2006, 01:29 PM

Quote:

Originally Posted by Huck

Rear gears were different depending on transmission, engine, and you could get optional gears. Look on glove box door--might help. A 72 C10 2wd V8 auto----would usually be 3.07 ----a 4 speed would be 3.73. Now that's the most common build. A 6cyl auto or 3 speed could be very different.

Thanks, HUCK! It's an automatic. The gears feel more like 3.07 or 3.08, which I had in my Nova. I just wanted some confirmation.

J

shifty · 11-13-2006, 06:14 PM

I was told that L6/250 or L6/292 came with 3.73's. I always take everything with a grain of salt, but have no reason to believe otherwise on this one

JameslovesJammie · 11-13-2006, 06:40 PM

My '72 C/10 has a 350, 4 speed granny gear, and 3.07's.

70GMCer · 11-13-2006, 06:56 PM

my 70 had a 350 3spd manual and has 373 gears

CPNEJR · 11-13-2006, 06:57 PM

my original 67 had a 250 3 speed and 3.73's and the truck i'm workin on now is a 350 3 speed and 3.08's

**Joesjunk** · 11-13-2006, 07:31 PM

My books show 1971 & 1972 1/2 tons had 3:73 "standard" with 6 cyl's and 307 v-8, and 3:07 "standard" with a 350 and 402 big block. Of course either or could have been ordered. Standard gears should not be listed on the option sheet.

Longhorn Man · 11-13-2006, 07:39 PM

The standard gears would be figured with a 3 speed manual tranny.
Most 4 speeds got a 3.07, as did the automatics. (we're talking 1/2 ton here)

Mad House · 11-13-2006, 10:54 PM

Most c-10's with 283 to 350 with automatic trannys came with 3:08 gears in the rear. Trucks with v-8's with manual trannys came with 3:73's. The straght 6 equipped c-10's came with 4:10's in the rear with manual trannys. Yet to see a straight 6 with a auto tranny.

Longhorn Man · 11-13-2006, 11:19 PM

that's not acurate. All 3 speed trucks (except big block) had a base gear of 3.73
the only 4.10 gears that came standard were with the overdrive trannys which only came in trucks with 307 engines, or smaller.
3.07 gears came in all automatic trucks (again, non big block) with V8, and V8 with 4 speeds.
I am not positive of the inline gears other than 3 speed off the top of my head, but I'll seee if I can't look it up here in a bit.

71meangreenc10 · 11-13-2006, 11:36 PM

My 71 old 250/3spd had 3.73 till I changed it, my 72 has 3 spd 307 with 3.73, I dont know what the burb has yet, all the 6 cyl's 3spds had 3.73 that Ive owned, had 2 types of 3 spd tranny's,.

Smitty

**Joesjunk** · 11-13-2006, 11:56 PM

Quote:

Originally Posted by Longhorn Man

that's not acurate. All 3 speed trucks (except big block) had a base gear of 3.73
the only 4.10 gears that came standard were with the overdrive trannys which only came in trucks with 307 engines, or smaller.
3.07 gears came in all automatic trucks (again, non big block) with V8, and V8 with 4 speeds.
I am not positive of the inline gears other than 3 speed off the top of my head, but I'll seee if I can't look it up here in a bit.

Check your books again, if you look at the brochure books it was not the tranny that got you the gears, it was the motor choice. Every 350 truck I have had and parted had 3:07 gears in it, and I have had them with
3 speeds, 4 speeds and automatics. Every Big block 1/2t I have had had 3:07 gears also. The smaller engines had the steeper gear. This has been true in all the 100 or so trucks I have had. Now this is just my 2 cents worth too.

novajess1972 · 11-14-2006, 09:38 AM

Quote:

Originally Posted by Joesjunk

Check your books again, if you look at the brochure books it was not the tranny that got you the gears, it was the motor choice. Every 350 truck I have had and parted had 3:07 gears in it, and I have had them with
3 speeds, 4 speeds and automatics. Every Big block 1/2t I have had had 3:07 gears also. The smaller engines had the steeper gear. This has been true in all the 100 or so trucks I have had. Now this is just my 2 cents worth too.

Since it seems that I more than likely have 3.07s, how is the truck gonna fare with my new 468ci BB? I intended to keep these gears in so that I can still have a bit of highway-bility (yes, i made that word up). The motor is a roller, but I'm not into dragging or taking it to the track. Compression is still a real world pump gas 10:1 to 10.5:1. I just like having a stomper under the hood and being able to grab a few tire scratches every now and then. It is mated to a rebuilt TH350 tranny with shift kit. The stall converter is 3300. And I will also be installing a LockRight so that I am not tearing up the Yokohamas.

Your opinions are welcome and appreciated.

11-13-2006, 09:19 AM	#1
novajess1972 Registered User Join Date: Sep 2006 Location: Houston, Texas Posts: 190	Stock gears??? Can anyone tell me what the stock gears are in a 1972 C-10 2wd? __________________ 1985 SWB Silverado 1/2 Ton 1972 Chevy SWB 1/2 Ton (sold) 1972 Chevy Chevelle SS (sold) 1971 Chevy Nova (sold) 1967 Chevy El Camino (sold) 2001 Mustang Bullitt (sold) 2019 Toyota Tundra Crewmax (daily)

11-13-2006, 11:12 AM	#2
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: Stock gears??? Rear gears were different depending on transmission, engine, and you could get optional gears. Look on glove box door--might help. A 72 C10 2wd V8 auto----would usually be 3.07 ----a 4 speed would be 3.73. Now that's the most common build. A 6cyl auto or 3 speed could be very different.

11-13-2006, 06:14 PM	#4
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: Stock gears??? I was told that L6/250 or L6/292 came with 3.73's. I always take everything with a grain of salt, but have no reason to believe otherwise on this one __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

11-13-2006, 06:40 PM	#5
JameslovesJammie God Bless Mr. T Join Date: Apr 2004 Location: Minot, ND Posts: 348	Re: Stock gears??? My '72 C/10 has a 350, 4 speed granny gear, and 3.07's. __________________ Like a midget at a urinal...sometimes you must stay on your toes.

11-13-2006, 06:56 PM	#6
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Stock gears??? my 70 had a 350 3spd manual and has 373 gears __________________ 1997 GMC Sierra Ext 1965 Mustang

11-13-2006, 06:57 PM	#7
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: Stock gears??? my original 67 had a 250 3 speed and 3.73's and the truck i'm workin on now is a 350 3 speed and 3.08's __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

11-13-2006, 07:31 PM	#8
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,691	Re: Stock gears??? My books show 1971 & 1972 1/2 tons had 3:73 "standard" with 6 cyl's and 307 v-8, and 3:07 "standard" with a 350 and 402 big block. Of course either or could have been ordered. Standard gears should not be listed on the option sheet. __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

11-13-2006, 07:39 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Stock gears??? The standard gears would be figured with a 3 speed manual tranny. Most 4 speeds got a 3.07, as did the automatics. (we're talking 1/2 ton here)

11-13-2006, 10:54 PM	#10
Mad House Registered User Join Date: Nov 2006 Location: Riverdale, Georgia Posts: 6	Re: Stock gears??? Most c-10's with 283 to 350 with automatic trannys came with 3:08 gears in the rear. Trucks with v-8's with manual trannys came with 3:73's. The straght 6 equipped c-10's came with 4:10's in the rear with manual trannys. Yet to see a straight 6 with a auto tranny.

11-13-2006, 11:19 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Stock gears??? that's not acurate. All 3 speed trucks (except big block) had a base gear of 3.73 the only 4.10 gears that came standard were with the overdrive trannys which only came in trucks with 307 engines, or smaller. 3.07 gears came in all automatic trucks (again, non big block) with V8, and V8 with 4 speeds. I am not positive of the inline gears other than 3 speed off the top of my head, but I'll seee if I can't look it up here in a bit.

11-13-2006, 11:36 PM	#12
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,159	Re: Stock gears??? My 71 old 250/3spd had 3.73 till I changed it, my 72 has 3 spd 307 with 3.73, I dont know what the burb has yet, all the 6 cyl's 3spds had 3.73 that Ive owned, had 2 types of 3 spd tranny's,. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time Last edited by 71meangreenc10; 11-13-2006 at 11:37 PM.



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