how hard are 4:10 12bolt gears to find? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MJN** · 01-24-2004, 03:26 AM

What trucks did these come in? I'm having a hard time finding 4:10 gears for a 12 bolt rear for my '72 Blazer. I just want to know what I should look for and what trucks would be the best candidates to find them in. I can't buy anything right this minute I'm just trying to find out what trucks these came in and how hard they are to find. Thanks

*1972C10* · 01-24-2004, 03:30 AM

Seems like 6cyl trucks would be more likely to have them but

You might consider aftermarket. Then you dont have to worry about being worn out or the grease not being changed frequently.

**MJN** · 01-24-2004, 03:43 AM

The only ones I've found so far are 3:73's and 3:08's, I have yet to find a 12 bolt with 4:10's. I'm not too worried about using used gears, since thats what I have in there right now. I know of a junkyard near me that would let me inspect it before I bought it. So used is no problem, and aftermarket are kinda out of my price range right now.

*1972C10* · 01-24-2004, 04:03 AM

I heard that on the new gears being pricy. Good luck might check out the glovebox doors never know you might luck out

Pont · 01-24-2004, 07:56 AM

I would think they would be fairly common in our year of trucks, at least in the 4x4's. My 67 has the factory 12 bolt with 4.10 gears in it.

cdowns · 01-24-2004, 10:36 AM

richmond gear has plenty of them on the shelf waiting to ship out

70short/step · 01-24-2004, 11:27 AM

My truck has 4:10 posi and came with a 6 cyl. But now with the 327 and auto its way too low. too bad you didnt live closer.
70short/step

Mike C · 01-24-2004, 11:28 AM

Drivetrain warehouse (now part of 4wheel parts) sells Genuine Gear with a lifetime no-question asked warranty, and last I saw they had two gear sets and two master installation kits for $400. Do both ends of your 4x4 and get gears from you and a friend 2x4.

01-24-2004, 03:26 AM	#1
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,999	how hard are 4:10 12bolt gears to find? What trucks did these come in? I'm having a hard time finding 4:10 gears for a 12 bolt rear for my '72 Blazer. I just want to know what I should look for and what trucks would be the best candidates to find them in. I can't buy anything right this minute I'm just trying to find out what trucks these came in and how hard they are to find. Thanks __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

01-24-2004, 07:56 AM	#5
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	I would think they would be fairly common in our year of trucks, at least in the 4x4's. My 67 has the factory 12 bolt with 4.10 gears in it. __________________ 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"

01-24-2004, 10:36 AM	#6
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	richmond gear has plenty of them on the shelf waiting to ship out __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-24-2004, 11:28 AM	#8
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,715	Drivetrain warehouse (now part of 4wheel parts) sells Genuine Gear with a lifetime no-question asked warranty, and last I saw they had two gear sets and two master installation kits for $400. Do both ends of your 4x4 and get gears from you and a friend 2x4. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

01-24-2004, 03:30 AM	#2
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Seems like 6cyl trucks would be more likely to have them but You might consider aftermarket. Then you dont have to worry about being worn out or the grease not being changed frequently.

01-24-2004, 03:43 AM	#3
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,999	The only ones I've found so far are 3:73's and 3:08's, I have yet to find a 12 bolt with 4:10's. I'm not too worried about using used gears, since thats what I have in there right now. I know of a junkyard near me that would let me inspect it before I bought it. So used is no problem, and aftermarket are kinda out of my price range right now.

01-24-2004, 04:03 AM	#4
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I heard that on the new gears being pricy. Good luck might check out the glovebox doors never know you might luck out

01-24-2004, 11:27 AM	#7
70short/step Registered User Join Date: Dec 2003 Location: Stockton, CA Posts: 1,579	My truck has 4:10 posi and came with a 6 cyl. But now with the 327 and auto its way too low. too bad you didnt live closer. 70short/step



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