For Sale: N.O.S. GM 3.73 ring and pinion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*Shane* · 09-14-2003, 10:34 AM

Brand New ... Never Installed.

Bought these a year or so back for a project that got changed around, decided to use 3.08 ratio instead ... so now I don't need these.

A friend of mine who works at a local Chevy dealership found these on the shelf at another dealership thru their computer parts locator.

If no one here is interested, they will go on eBay ... but wanted to give ya'll "first dibs" on them.

$150 plus shipping.

Email or PM with any questions.

*Shane* · 09-14-2003, 10:34 AM

close-up of box

*Shane* · 09-14-2003, 10:35 AM

close -up of ring gear

*Shane* · 09-14-2003, 10:35 AM

close up of pinion and crush sleeve

Erl · 09-15-2003, 09:33 AM

Are these for a Dana 60? If they will fit my GMC 3/4 4x4, I will take them. I currently have the 4:56 ratio, and believe the 3:73 uses the same carrier.
Thanks

*Shane* · 09-15-2003, 01:35 PM

These are for the Coporate 12 bolt style rear-end.

Someone also asked if this gear set is for a 3 Series or a 4 Series carrier ... how do I tell?

**CUSTOM/10** · 09-15-2003, 01:55 PM

3.73 gears and higher go on a 4 series carrier.

mocwon · 09-15-2003, 05:31 PM

3.73 gears will also fit series 3 carrier if they are the thick gears.

**CUSTOM/10** · 09-16-2003, 08:55 AM

I wasn't aware that they made a Thick & Thin set of gears !!!!!

Was this from GM or was this difference an after market solusion to put different gears on other carriers.

mocwon · 09-16-2003, 10:24 PM

3.42 and numerically larger GM gears are for the series 4 carrier. Lower numbers than 3.42 are for the series 3 carrier. However, gears are made for a series 3 carrier that are 3.42 and numerically larger. They are thicker to compensate for the difference in size of the carrier. I have never tried to find GM gears since Richmond, Precision and others make these gears for a heck of a lot less monsy and they are just as good or better than GM gears.

72skytop · 09-30-2003, 02:44 PM

I have a 1971 Chevrolet half ton, series 10 pickup with the originally installed since brand new 3.08 posi rear end. Does anybody know if these gears will work? And what is the easiest way to find the correct speedometer gear for the 400 trans?

Thanks.

Kevin Korff

Vince M · 10-01-2003, 05:42 PM

72skytop,

You'll have to change the carrier if you want to use these gears. As stated you would need the 4 series carrier. You currently have a 3 series if you have the 3.07 rear. Hope this helps..

Shane is the set still for sale or is it spoken for..?

Thanks,

Vince

*Shane* · 10-01-2003, 06:33 PM

The set of gears is still for sale. PM or email me if interested. The email notification is not working when someone replies ...

72skytop · 10-01-2003, 09:48 PM

Thanks for the information Vince. I read through all the previous posts on this and I could not come to the conclusion.

I guess I'll just keep cruisin' with the 3.08's....yuk. I want to do a burnout! Can't with these gears. 402 big block dog.....

Thanks

09-14-2003, 10:34 AM	#1
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	For Sale: N.O.S. GM 3.73 ring and pinion Brand New ... Never Installed. Bought these a year or so back for a project that got changed around, decided to use 3.08 ratio instead ... so now I don't need these. A friend of mine who works at a local Chevy dealership found these on the shelf at another dealership thru their computer parts locator. If no one here is interested, they will go on eBay ... but wanted to give ya'll "first dibs" on them. $150 plus shipping. Email or PM with any questions. Attached Images Last edited by Shane; 09-14-2003 at 10:40 AM.

09-14-2003, 10:34 AM	#2
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	close-up of box Attached Images

09-14-2003, 10:35 AM	#3
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	close -up of ring gear Attached Images

09-14-2003, 10:35 AM	#4
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	close up of pinion and crush sleeve Attached Images

09-15-2003, 09:33 AM	#5
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Are these for a Dana 60? If they will fit my GMC 3/4 4x4, I will take them. I currently have the 4:56 ratio, and believe the 3:73 uses the same carrier. Thanks __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX Last edited by Erl; 09-15-2003 at 12:29 PM.

09-15-2003, 01:35 PM	#6
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	These are for the Coporate 12 bolt style rear-end. Someone also asked if this gear set is for a 3 Series or a 4 Series carrier ... how do I tell? Last edited by Shane; 09-15-2003 at 01:44 PM.

09-15-2003, 01:55 PM	#7
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,833	3.73 gears 3.73 gears and higher go on a 4 series carrier.

09-15-2003, 05:31 PM	#8
mocwon Keep On Truckin' Join Date: Mar 2003 Location: Buda, Texas Posts: 1,354	3.73 gears and higher go on a 4 series carrier. 3.73 gears will also fit series 3 carrier if they are the thick gears. __________________ Just Passin' Thru Some projects are like herding cats; others are like putting out fires; this one was like herding cats on fire.....

09-16-2003, 08:55 AM	#9
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,833	3.37 Thick & Thin I wasn't aware that they made a Thick & Thin set of gears !!!!! Was this from GM or was this difference an after market solusion to put different gears on other carriers.

09-16-2003, 10:24 PM	#10
mocwon Keep On Truckin' Join Date: Mar 2003 Location: Buda, Texas Posts: 1,354	I wasn't aware that they made a Thick & Thin set of gears !!!!! 3.42 and numerically larger GM gears are for the series 4 carrier. Lower numbers than 3.42 are for the series 3 carrier. However, gears are made for a series 3 carrier that are 3.42 and numerically larger. They are thicker to compensate for the difference in size of the carrier. I have never tried to find GM gears since Richmond, Precision and others make these gears for a heck of a lot less monsy and they are just as good or better than GM gears. __________________ Just Passin' Thru Some projects are like herding cats; others are like putting out fires; this one was like herding cats on fire.....

09-30-2003, 02:44 PM	#11
72skytop Registered User Join Date: May 2003 Location: Evansville, IN Posts: 147	Gears I have a 1971 Chevrolet half ton, series 10 pickup with the originally installed since brand new 3.08 posi rear end. Does anybody know if these gears will work? And what is the easiest way to find the correct speedometer gear for the 400 trans? Thanks. Kevin Korff

10-01-2003, 05:42 PM	#12
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	72skytop, You'll have to change the carrier if you want to use these gears. As stated you would need the 4 series carrier. You currently have a 3 series if you have the 3.07 rear. Hope this helps.. Shane is the set still for sale or is it spoken for..? Thanks, Vince __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

10-01-2003, 06:33 PM	#13
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	The set of gears is still for sale. PM or email me if interested. The email notification is not working when someone replies ...

10-01-2003, 09:48 PM	#14
72skytop Registered User Join Date: May 2003 Location: Evansville, IN Posts: 147	Gears Thanks for the information Vince. I read through all the previous posts on this and I could not come to the conclusion. I guess I'll just keep cruisin' with the 3.08's....yuk. I want to do a burnout! Can't with these gears. 402 big block dog..... Thanks

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