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#1 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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71 C-10 Rear Differential problems??
I am having rear diff problems. Looks like I am going to need spider gears, axle gears, possibly a carrier. I may just buy a whole rear end. I am just looking at my options and I am not sure what years fit. Can I use the carrier out of a later model leaf spring rear? Can I use an older 6 lug rear and use my 5 lug axles?
71 C-10 12 bolt, 3.73 posi with coil springs. I am willingly to go with a non-posi and a higher gear ratio. If you have answers or parts I would appreciate any help. ![]()
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: 71 C-10 Rear Differential problems??
what problems are you having? do you have the proper lube in the rear for a posi?
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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 Last edited by cdowns; 03-29-2011 at 06:05 PM. |
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#3 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
It was loud and I am planning on riding it on the Hot Rod Power Tour, so I thought I would take a look. When I went to remove the pin to get the axles out, it was stuck. We had to cut it out, it had welded itself to the gears. It is the wrong carrier for the 3.73, it had over 1/2" of shims on one side to move the ring gear closer to the pinon. It was full of lube and it actually looked clean, but who knows what it is. It was in there when I bought it a year ago.
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#4 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
I have read 12 bolt truck carriers work 67-79, can anyone confirm this?
I have found a rear end out of a 76.
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#5 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: 71 C-10 Rear Differential problems??
Hmm interesting......
Can someone confirm?..
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John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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#6 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
Anyone??
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#7 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: 71 C-10 Rear Differential problems??
i think the quickest cheapest fix is trying to find a complete rear assy and if needed weld mounting saddles and tpanhard bar mount to install
from your description i'd b afraid to reuse that housing as there might b hidden damage due to bubba engineering i'd b so disgusted at seeing something like that i'd drop off at the recycler
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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 |
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#8 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
I am still trying to determine if a later year model carrier will work. My housing looks good.
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#9 |
Registered User
![]() Join Date: Jan 2008
Location: Fort Wayne, Indiana
Posts: 197
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Re: 71 C-10 Rear Differential problems??
I was told they were the same all the way up till 86' I believe. The 76' should be the same, I had a 74' rear end and the carrier was the same as my 71'.
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#10 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: 71 C-10 Rear Differential problems??
Any "Truck" 12 bolt carrier will work. The carriers are all the same. The car 12 bolt carriers are different. There are, however, different axle widths. My advice is to find another 4 series 12 bolt truck(sometimes referred to as 12T) carrier and replace it.
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Last edited by 68Stepbed; 03-30-2011 at 03:59 PM. |
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#11 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: 71 C-10 Rear Differential problems??
If you replace the carrier you will have to set the pinion depth & tooth contact. Tuff job on that kind of trans. I'm with Downs. Get the whole rear end from a 71-72. You probably will get one with 3.08 gears to give you a good highway gear.
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#12 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
My axles are good, my housing is good with new wheel cylinders, shoes and brake lines and my truck has an overdrive tranny so I don't need a highway gear, I would rather just replace the carrier. Not many 67-72 trucks around, but I know where there are several later models.
Is a 4x4 carrier the same as long as it is a 12 bolt?
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#13 |
Registered User
Join Date: Aug 2005
Location: DFW
Posts: 268
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Re: 71 C-10 Rear Differential problems??
Reverse engineer it. Go to Jegs or Summit and see what Part nummbers fit what years. I suspect all truck 12 bolts are the same regardless of 4X4 or 4X2.
I have done the new ring gear and pinion....... not fun while still under the truck. Next time I will remove the rearend so I am not sitting under the truck for hours on end.
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1970 Custom Original 400/400 Now ZZ454/4L80E/Edelbrock Pro-Flo 4/3:73 Eaton Posi PS PB and cold factory air Early Classic 4.5/6 Front 20X8.5 Riddler 4.75 inch bs Pirelli 255/40/20 Rear 20X10 Riddler 5.5 inch bs Toyo 295/40/40 Rear end is original wide 6 lug converted to 5 lug |
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#14 | |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
Quote:
The rear is out of the truck to make life a little easier.
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#15 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: 71 C-10 Rear Differential problems??
4x4 and 4x2 are the same. All 12 bolt truck rears have the same carrier.
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#16 |
Registered User
Join Date: Aug 2005
Location: DFW
Posts: 268
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Re: 71 C-10 Rear Differential problems??
I agree.
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1970 Custom Original 400/400 Now ZZ454/4L80E/Edelbrock Pro-Flo 4/3:73 Eaton Posi PS PB and cold factory air Early Classic 4.5/6 Front 20X8.5 Riddler 4.75 inch bs Pirelli 255/40/20 Rear 20X10 Riddler 5.5 inch bs Toyo 295/40/40 Rear end is original wide 6 lug converted to 5 lug |
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#17 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
Well I found a deal on a rear today. I knew it was 1 1/2 narrower, but I was going to use my housing and axles. I ran into a snag. the axles in my truck are fine spline and the axles in the one I bought are course spline. So I either need to find some axle gears or try to put the narrower rear under my truck. It has 6 lug wheels so I would have to get the axles drilled for the 5 bolt pattern.
I have a couple of questions. 1. any idea what my new rear is out of, it is narrower, has course spline axles and the panard bar mounts differently? 2. if i put this one under my truck will the narrower width be noticable?
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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#18 |
Registered User
Join Date: Jan 2010
Location: Dublin VA
Posts: 168
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Re: 71 C-10 Rear Differential problems??
Here is a photo of the 2 axles
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73 C-10 Cheyenne Super 454 60 Impala LS powered 16 Camaro 2SS 6speed 12 Ultra Classic 71 Vega Wagon V8 4 speed |
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