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06-23-2009, 09:25 PM | #1 |
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Join Date: Feb 2008
Location: Florala, AL
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89 Chevy rear end width
Does anyone know if the 10 or 12 bolt rearends under the 73-87 chevy trucks are narrower or are the mounting pads just differenet? I am looking for a rearend for my 89, that would be around 2 in narrower, so that I can pull my 295/50 R15 deeper into the fender wells so when I drop it on down there won't be clearnce issues.. just want to avoid floppin down a grand or two just for shortening my factory housing and axles.. or would something like a ford explorer rear work? I am going to wind up loading the housing with Detroit True Trac and 4.11.. to wake up my 383 tbi I have built. but I want it LOW lol
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06-23-2009, 09:55 PM | #2 |
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Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
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Re: 89 Chevy rear end width
You want it low, huh? How much lower in Alabama can you get and not be in Florida. I went thru your town, once.
If you don't get an answer pretty soon, I can move this to the engine/drivetrain forum. There's some knowledgeable folks over there, too. Only thing is, they're oriented toward drivetrains.
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06-24-2009, 11:44 AM | #3 |
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Re: 89 Chevy rear end width
yea man.. like 8-9 inch of drop over the rear and tuck those fat tires. thats the look I want. sorta a pro street look. loud, wide, and nasty. yea thats me, smallville Alabama lol. how do you move the post? that would be helpful
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06-24-2009, 11:00 PM | #4 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
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Re: 89 Chevy rear end width
The '73-'87's are a couple of inches narrower than the '88 and up differentials. I have the exact measurements at the shop. I can look it up tomorrow and let you know.
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06-25-2009, 11:19 AM | #5 |
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Re: 89 Chevy rear end width
sweet!! thanks! I was wondering that. I knew some of the 73-87 I have had tucked 10 in wheels in the back with no issue. I just wanted to be able to tuck my 8 in wheels
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06-26-2009, 11:57 AM | #6 |
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Re: 89 Chevy rear end width
I measured my rearends. I have a 81 C10 2wd and a 89 C1500 2wd. the inside width, measured between the insides of the brake drums appears about a inch narrower on the c10. has anyone changed the rear out of an 89 in favor of the 12 bolt C10? I need it a little narrower so I can squeeze those 295/50 R15 up in the rear fender well.. any help would be appretiated
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06-26-2009, 10:57 PM | #7 | |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
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Re: 89 Chevy rear end width
Quote:
The 10 bolt in my '90 C1500 measures 64 3/4" WMS to WMS The 12 bolts in the '70-'80 C10's measure 63 1/2" WMS to WMS The 12 bolts in the '63-'70 C10's (6 lug)measure 62 1/8" WMS to WMS The '81-'87 10 bolts should be the same width as the '70-'80 12 bolts, but I haven't measures one to verify that. So there is a little info for you to work with to see what will work for your truck.
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06-27-2009, 02:50 AM | #8 |
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Re: 89 Chevy rear end width
hmm.. I have a 70 out in my pile of stuff.. but I guess I would have to get 5 lug axles beings its 6 lug. that sounds like it would be just right to tuck those tires like I want too. I'd have to change mount and all too.. but that's no biggie. I plan on flipping it to the top of the leafs anyways to make my drop. that would eliminate the need to purchase a flip "kit". just relocate my factory mount pads.. anyone done this? does it seem worth it? If I could find a custom offset wheel all this could be avoided. thats my whole issue. I am running a 15x8.5 wheel. I don't know what the backspacing is. it's a Ultra brand wheel, polished aluminum. looks like a rip off of the old Cragar Street star. I just love the look of those 295/50 under the back.. plus with my little stroker I built I need the meats along with a locker lol
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08-31-2018, 03:28 PM | #9 |
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Join Date: Dec 2017
Location: Oak Park, MI
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Re: 89 Chevy rear end width
Hi,
I have a 65 C20, and was thinking about swapping the Eaton semi floater out in favor of a Full Floater from a 2013 Chevy Duramax Silverado. I know the rear track of my Eaton, but not so sure about the 2013 full floater, and cant seem to find it on the internet. Does anyone know, by chance? |
08-31-2018, 07:00 PM | #10 |
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Join Date: May 2004
Location: Binghamton, NY
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Re: 89 Chevy rear end width
9 year old thread, nice. It's wider, like 69".
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08-31-2018, 07:29 PM | #11 |
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Join Date: Dec 2017
Location: Oak Park, MI
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Re: 89 Chevy rear end width
yes, I know it's an old thread, but it seems to be relevant to my question so I figured it was as good of a place to post as any. That said, the rear track of my 65 C20 is 67 in, so if the other axle is 69, that's pretty close, I think. Anyone disagree?⅝
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01-28-2021, 11:29 PM | #12 |
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Join Date: Jan 2013
Location: Alberta, Canada
Posts: 7
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Re: 89 Chevy rear end width
I know this is an old thread but I am interested in this topic. Have been looking and measuring and I swear the the 73-80 12 bolt is narrower than the 81-87 10 bolt. As far as I can tell the 73-80 12 bolt is 63.5" axle to axle or 63.75" WMS to WMS. The 81-87 seems like it is a little wider at 64.25" axle to axle or 64.5" WMS to WMS. I have measure my 78, but I don't have a square eye square body to compare to. I am building my own 15x11 rally wheels and fitment and backspacing choice is crucial. It looks to me that you would need different offset as they are different by 3/8" per side.
Anyone else have verified 81-87 2wd 10 bolt rear axle widths? |
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