Eaton 5.13 thirds - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wrangler94 · 08-04-2008, 10:44 PM

Hey guys. I'm looking for an Eaton HO52 or 72 third with 5.13 gears. I keep finding eaton thirds and learning things I would have never guessed about them, but I can't find what I'm looking for, at least not yet. What's the best trucks to find 5.13 gears in?

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**special-K** · 08-04-2008, 10:50 PM

I have that ratio in my C/30 wrecker.I`m trying to sell the truck,but would like to keep(ever been there?).I`d trade 3rds if it doesn`t sell at Carlisle Trucks this weekend.Kinda nice that they can be swapped right out and back,huh?What ratios(s) do you have?

BobS · 08-04-2008, 11:03 PM

You'd find 5.13s mostly in 1-tons and the older, the better.

Bob

69TowRig · 08-04-2008, 11:45 PM

Well since I am now dragging your butt to Carlisle this weekend why don't you talk it over with Tim then. Tim what kind of beer should he bring to work you over with?

I wish they made 5.38:1 ratios for them, I'd run one on my wheelin' rig.

wrangler94 · 08-05-2008, 07:50 PM

Quote:

Originally Posted by special-K

I have that ratio in my C/30 wrecker.I`m trying to sell the truck,but would like to keep(ever been there?).I`d trade 3rds if it doesn`t sell at Carlisle Trucks this weekend.Kinda nice that they can be swapped right out and back,huh?What ratios(s) do you have?

I'm 99% sure i've got 4.56 but I'll try to find out before i leave for carlisle. I know what you mean about wanting to keep and wanting to sell. I had my hands on 3 different eatons saturday but I don't think any have 5.13 gears.

**special-K** · 08-05-2008, 06:53 AM

Answer:Wet and cold.
I just read that no glass containers were allowed.Nobody stopped my Corona consumption last year.Didn`t break any either.I drink that Mexican water when I`m having more than a couple few.

See ya there.

**Joesjunk** · 08-05-2008, 05:58 PM

I have one with 55K original miles on it. Shipping might kill you though!!!

wrangler94 · 08-05-2008, 07:51 PM

Quote:

Originally Posted by Joesjunk

I have one with 55K original miles on it. Shipping might kill you though!!!

well shipping a 5.13 third is cheaper than buying a 14 bolt and gearing it 5.13 i'm sure. well...I hope

**Joesjunk** · 08-07-2008, 06:50 PM

If you want a shipping quote I need your zip code.

**Joesjunk** · 08-07-2008, 06:52 PM

You should joint the board before you make any purchases!! Its well worth it!

wrangler94 · 08-10-2008, 11:36 PM

Quote:

Originally Posted by wrangler94

Hey guys. I'm looking for an Eaton HO52 or 72 third with 5.13 gears. I keep finding eaton thirds and learning things I would have never guessed about them, but I can't find what I'm looking for, at least not yet. What's the best trucks to find 5.13 gears in?

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Please consider joining.

Sorry about that Longhair. I didn't really intend for it to turn into a WTB thread but I guess it worked out that way. I was registered as 69GMCtowrig about a year ago but lost my login information. Mostly I wanted to know what trucks to look in to find what I needed since info is so scarce on these axles.

thirdstreettito · 08-11-2008, 11:57 AM

Did the 60-66 C-40-60's have em? There is one a a yard by me, I might be able to get it for ya. Dont know if its a 2-speed though.

wrangler94 · 08-11-2008, 03:44 PM

Quote:

Originally Posted by thirdstreettito

Did the 60-66 C-40-60's have em? There is one a a yard by me, I might be able to get it for ya. Dont know if its a 2-speed though.

I don't know much (well anything) about the 60-66 trucks. I know Eatons were in the older trucks but I don't know the designations on the older ones. It's smaller than what you'd find in a 2 ton truck like a grain hauler or whatever. If it is a 2 speed rear it's definitely not an Eaton HO 52 or 72. If it looks like a mini dump truck axle or a ford 9 inch though it probably is.

**special-K** · 08-12-2008, 06:51 AM

The HO52s were 20 series and HO72s were 30 series,onlly light trucks.Over 30 seies jumps into the medium duty world and the rears get alot bigger.Very little swappable parts between MD and LT.

wrangler94 · 08-12-2008, 07:31 PM

Quote:

Originally Posted by special-K

The HO52s were 20 series and HO72s were 30 series,onlly light trucks.Over 30 seies jumps into the medium duty world and the rears get alot bigger.Very little swappable parts between MD and LT.

That's what I thought. I just wasn't sure exactly what a C40 was as far as 1 ton or was it bigger.

1969 GMC · 08-13-2008, 01:22 AM

If I had a choice of eatons, i'd take the newest one i could find. i have 2 eaton thirds, one is a 4.57 from a 60-66 c20 with a no-spin, the other is an open 5.14 from a '68 c30 cab and chassis (motor home). the newer third has what appears to be an extra channel cast into the third for additional oil to the pinion bearings. i think this is an age thing.

just something i have observed after doing a little research on this axle.

**special-K** · 08-13-2008, 07:37 AM

I`m not too sure about the C/40s.They were built on the light truck platform and I guess they all have the 5 & 10 lug pattern.I`m not sure if they`d have the biggerrear or an HO72.But,up front they`d still have the A-arm suspension.So,I`m not sure where the parts were heavied up.Possibly just at the wheal bearings and brakes.

08-04-2008, 10:44 PM	#1
wrangler94 Registered User Join Date: Jul 2008 Location: Washington, NC Posts: 93	Eaton 5.13 thirds Hey guys. I'm looking for an Eaton HO52 or 72 third with 5.13 gears. I keep finding eaton thirds and learning things I would have never guessed about them, but I can't find what I'm looking for, at least not yet. What's the best trucks to find 5.13 gears in? You must be a subscribing member to post WTB threads. Please consider joining. Last edited by LONGHAIR; 08-07-2008 at 08:17 PM.

08-04-2008, 10:50 PM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Eaton 5.13 thirds I have that ratio in my C/30 wrecker.I`m trying to sell the truck,but would like to keep(ever been there?).I`d trade 3rds if it doesn`t sell at Carlisle Trucks this weekend.Kinda nice that they can be swapped right out and back,huh?What ratios(s) do you have? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-04-2008, 11:03 PM	#3
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: Eaton 5.13 thirds You'd find 5.13s mostly in 1-tons and the older, the better. Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

08-04-2008, 11:45 PM	#4
69TowRig Senior Member Join Date: Jan 2005 Location: Raleigh, NC Posts: 894	Re: Eaton 5.13 thirds Well since I am now dragging your butt to Carlisle this weekend why don't you talk it over with Tim then. Tim what kind of beer should he bring to work you over with? I wish they made 5.38:1 ratios for them, I'd run one on my wheelin' rig. __________________ -Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals...

08-05-2008, 06:53 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Eaton 5.13 thirds Answer:Wet and cold. I just read that no glass containers were allowed.Nobody stopped my Corona consumption last year.Didn`t break any either.I drink that Mexican water when I`m having more than a couple few. See ya there. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-05-2008, 05:58 PM	#7
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,702	Re: Eaton 5.13 thirds I have one with 55K original miles on it. Shipping might kill you though!!! __________________ 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

08-07-2008, 06:50 PM	#9
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,702	Re: Eaton 5.13 thirds If you want a shipping quote I need your zip code. __________________ 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

08-07-2008, 06:52 PM	#10
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,702	Re: Eaton 5.13 thirds You should joint the board before you make any purchases!! Its well worth it! __________________ 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

08-11-2008, 11:57 AM	#12
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: Eaton 5.13 thirds Did the 60-66 C-40-60's have em? There is one a a yard by me, I might be able to get it for ya. Dont know if its a 2-speed though. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck Last edited by thirdstreettito; 08-11-2008 at 12:05 PM.

08-12-2008, 06:51 AM	#14
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Eaton 5.13 thirds The HO52s were 20 series and HO72s were 30 series,onlly light trucks.Over 30 seies jumps into the medium duty world and the rears get alot bigger.Very little swappable parts between MD and LT. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-13-2008, 01:22 AM	#16
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Re: Eaton 5.13 thirds If I had a choice of eatons, i'd take the newest one i could find. i have 2 eaton thirds, one is a 4.57 from a 60-66 c20 with a no-spin, the other is an open 5.14 from a '68 c30 cab and chassis (motor home). the newer third has what appears to be an extra channel cast into the third for additional oil to the pinion bearings. i think this is an age thing. just something i have observed after doing a little research on this axle. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

08-13-2008, 07:37 AM	#17
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Eaton 5.13 thirds I`m not too sure about the C/40s.They were built on the light truck platform and I guess they all have the 5 & 10 lug pattern.I`m not sure if they`d have the biggerrear or an HO72.But,up front they`d still have the A-arm suspension.So,I`m not sure where the parts were heavied up.Possibly just at the wheal bearings and brakes. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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