rearend pics please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

biglou55 · 08-09-2004, 09:40 AM

No not that kind of rearend. I have a 69 3/4 ton and i would like to know if it is a dana or rockwell. it is kind of a round back cover. where would i find the gear ratio on it. the glove box decal is completly faded.all help would be greatly apreciated thank,s big lou.

**53burb** · 08-09-2004, 11:57 AM

It sounds like you have an Eaton Rear. I also have a '69 3/4 ton. I believe the ratios are either 4.11 or 4.57...
Chris

**FRENCHBLUE72** · 08-09-2004, 11:58 AM

It could also be a eaton from the round cover you describe..

JimKshortstep4x4 · 08-09-2004, 12:08 PM

Does it look like any of these?

Jim

http://www.coloradok5.com/axleguide.shtml

biglou55 · 08-10-2004, 06:27 AM

Jim it does not look like any of them, dana or gm the filler hole is on the left hand side of the cover.when you are standing in the back of the truck.

biglou55 · 08-10-2004, 10:02 AM

T T T.

Fred T · 08-10-2004, 10:12 AM

Try this website to i.d. your differential.
Differential Applications

Budweis · 08-10-2004, 02:03 PM

heres my eaton

biglou55 · 08-10-2004, 02:56 PM

thank,s budweis

That,s it round cover and all do you happen to know what ratios they used. or if it is on the case anywhere. thank,s biglou.

Dean · 08-10-2004, 03:13 PM

4.10 or 4.56 most likely. Ratio not on the case. You can either pull the back cover to read it or do the old spin the wheel and watch the driveshaft routine.

biglou55 · 08-10-2004, 03:16 PM

Thank.s dean

Bram · 08-10-2004, 03:51 PM

Dang Budweis that looks good! Do you have anymore pic's?

Budweis · 08-10-2004, 07:39 PM

Quote:

Originally Posted by Bram

Dang Budweis that looks good! Do you have anymore pic's?

thanks, heres a few more but its all in pieces still right now. working on that differential i got from you and wont be long and its going in. putting new u-joints, balljoints, seals , bearings, tie rod ends etc in it then gonna put it in. just got my corvette master cylinder and proportioning valve on it today as seen in pic. gonna be nice with 4 wheel disc cant wait.

richardwilken · 08-10-2004, 11:19 PM

Budweis,
I Assume Your Truck Was Originally Drums All Around. Where Did The Discs Come From? Is There A Manufacturer Producing A Conversion Kit To Go To All Drums? Thanks

Budweis · 08-10-2004, 11:40 PM

yeah was 4 wheel drum, got the rear disc kit for the eaton at Blackbirds and for the front im using a 72 dana 44 with disc already on it i got from bram. all 4 wheels will use the same rotor calipers, and pads now which is also a bonus.

drink2mny · 08-11-2004, 12:50 AM

Quote:

Originally Posted by Budweis

yeah was 4 wheel drum, got the rear disc kit for the eaton at Blackbirds

Thanks Budweis

Bram · 08-11-2004, 09:08 AM

WOW! That looks really good. What size are those slicks

you have on there?

Budweis · 08-11-2004, 01:59 PM

thanks bram, tires are 35x14.50 on 16x10 rims. it's getting a 6" lift.

**Joesjunk** · 08-11-2004, 03:51 PM

Here is a pic of where the #'s are stamped on an Eaton rear end. Not a very good pic, but it should help. If you find the letters, I can look it up for you.

**Joesjunk** · 08-11-2004, 03:54 PM

Opps, forgot the pic,

**Joesjunk** · 08-11-2004, 03:55 PM

That pic is the top of the 3rd member. Good luck!!

biglou55 · 08-14-2004, 03:39 PM

:p Joe the # on the rearend are MU0110G there is another # lower on the drivers side also 3883379 all help is apreciated biglou.

**Joesjunk** · 08-15-2004, 11:42 PM

My book shows 1969 "MU" to be a 3:73 Locking axle for a C-20 or a
G-20? It also shows "MU" to be a 1967 C-30 5:14 Locker rear axle? Does that sound like what you have???

biglou55 · 08-16-2004, 08:35 AM

Joe i beleive it,s the mu 3-73 unit the rear hasn,t been changed acording to the p-o . is it worth anything seeing that it is a 3/4 ton locker. biglou 55 (

thank,s for your patience and help)

**Joesjunk** · 08-16-2004, 12:01 PM

If your rear axle is a Eaton, I have never seen a 3:73 ratio in one of them. You might want to double check by pulling the cover and getting the numbers off the ring gear. You might also double check the "MU" code on the rear end again. My book shows codes for trucks and vans, and I am thinking the 3:73 was a van ratio??? Having the locker makes it worth alot more.

08-09-2004, 09:40 AM	#1
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	rearend pics please No not that kind of rearend. I have a 69 3/4 ton and i would like to know if it is a dana or rockwell. it is kind of a round back cover. where would i find the gear ratio on it. the glove box decal is completly faded.all help would be greatly apreciated thank,s big lou. __________________ Certifiably crazy person

08-10-2004, 06:27 AM	#5
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Jim it does not look like any of them, dana or gm the filler hole is on the left hand side of the cover.when you are standing in the back of the truck. __________________ Certifiably crazy person

08-10-2004, 10:02 AM	#6
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	T T T. __________________ Certifiably crazy person

08-10-2004, 10:12 AM	#7
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Try this website to i.d. your differential. Differential Applications __________________ Fred There is no such thing as too much cam...just not enough engine.

08-10-2004, 02:03 PM	#8
Budweis Geared for Collision Join Date: Jan 2004 Location: St. Louis, Mo. Posts: 683	heres my eaton Attached Images __________________ MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe

08-09-2004, 11:57 AM	#2
53burb Registered User Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,004	It sounds like you have an Eaton Rear. I also have a '69 3/4 ton. I believe the ratios are either 4.11 or 4.57... Chris

08-09-2004, 11:58 AM	#3
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	It could also be a eaton from the round cover you describe..

08-09-2004, 12:08 PM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Does it look like any of these? Jim http://www.coloradok5.com/axleguide.shtml

08-10-2004, 02:56 PM	#9
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	thank,s budweis That,s it round cover and all do you happen to know what ratios they used. or if it is on the case anywhere. thank,s biglou. __________________ Certifiably crazy person

08-10-2004, 03:13 PM	#10
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	4.10 or 4.56 most likely. Ratio not on the case. You can either pull the back cover to read it or do the old spin the wheel and watch the driveshaft routine.

08-10-2004, 03:16 PM	#11
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Thank.s dean __________________ Certifiably crazy person

08-10-2004, 03:51 PM	#12
Bram Broke Join Date: Aug 2001 Location: West Plains,MO Posts: 385	Dang Budweis that looks good! Do you have anymore pic's? __________________ 72CheyenneSuper1ton4x4BigBlock

08-10-2004, 11:19 PM	#14
richardwilken Registered User Join Date: Sep 2003 Location: clifton, IL Posts: 114	Budweis, I Assume Your Truck Was Originally Drums All Around. Where Did The Discs Come From? Is There A Manufacturer Producing A Conversion Kit To Go To All Drums? Thanks __________________ 69 chevy 1/2 ton 2wd 72 GMC 1/2 ton 2wd

08-10-2004, 11:40 PM	#15
Budweis Geared for Collision Join Date: Jan 2004 Location: St. Louis, Mo. Posts: 683	yeah was 4 wheel drum, got the rear disc kit for the eaton at Blackbirds and for the front im using a 72 dana 44 with disc already on it i got from bram. all 4 wheels will use the same rotor calipers, and pads now which is also a bonus. __________________ MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe

08-11-2004, 09:08 AM	#17
Bram Broke Join Date: Aug 2001 Location: West Plains,MO Posts: 385	WOW! That looks really good. What size are those slicks you have on there? __________________ 72CheyenneSuper1ton4x4BigBlock



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08-11-2004, 01:59 PM	#18
Budweis Geared for Collision Join Date: Jan 2004 Location: St. Louis, Mo. Posts: 683	thanks bram, tires are 35x14.50 on 16x10 rims. it's getting a 6" lift. __________________ MEMBER OF THE 4 WHEEL DISK BRAKE CLUB 1970 C/K20 3/4 Ton 1996 Collectors Edition Corvette 1977 Corvette Coupe

08-11-2004, 03:51 PM	#19
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,693	Here is a pic of where the #'s are stamped on an Eaton rear end. Not a very good pic, but it should help. If you find the letters, I can look it up for you. __________________ 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

08-11-2004, 03:54 PM	#20
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,693	Opps, forgot the pic, Attached Images __________________ 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

08-11-2004, 03:55 PM	#21
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,693	That pic is the top of the 3rd member. Good luck!! __________________ 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

08-14-2004, 03:39 PM	#22
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	:p Joe the # on the rearend are MU0110G there is another # lower on the drivers side also 3883379 all help is apreciated biglou. __________________ Certifiably crazy person

08-15-2004, 11:42 PM	#23
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,693	My book shows 1969 "MU" to be a 3:73 Locking axle for a C-20 or a G-20? It also shows "MU" to be a 1967 C-30 5:14 Locker rear axle? Does that sound like what you have??? __________________ 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

08-16-2004, 08:35 AM	#24
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Joe i beleive it,s the mu 3-73 unit the rear hasn,t been changed acording to the p-o . is it worth anything seeing that it is a 3/4 ton locker. biglou 55 ( thank,s for your patience and help) __________________ Certifiably crazy person

08-16-2004, 12:01 PM	#25
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,693	If your rear axle is a Eaton, I have never seen a 3:73 ratio in one of them. You might want to double check by pulling the cover and getting the numbers off the ring gear. You might also double check the "MU" code on the rear end again. My book shows codes for trucks and vans, and I am thinking the 3:73 was a van ratio??? Having the locker makes it worth alot more. __________________ 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

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