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#1 |
Senior Member
Join Date: Feb 2003
Location: Wichita KS
Posts: 610
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I need a HUGE favor
can someone who's got their wheels off their truck already do a little measuring for me? I'm almost sure that the 10 bolt and the 12 bolt are the same width, but mine's a 12 bolt.
I need these measurements. 1) overall width of the rearend, So I'm sure that it's the same as mine. 2) Then I need the distance from the outside of the drum (surface that the wheel is bolted to) to the inside of the fender lip in the top center of the opening. Basically, I've gotta narrow my rearend for the 28X 14.5's and I don't have a box together to measure. If I could get a good accurate measurement from one (preferably more of you that come up with the SAME numbers ![]() Thanks a million in advance
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~Steve~
Friesen High Performance Auto and Graphics Toy: 87 Shortwide, 406 smallblock with a little boost My 87 buildup Daily Driver: 99 Sierra SLE 4X4. Black on Black and harder than hell to keep clean. ![]() |
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#2 |
www.73-87chevytrucks.com
![]() Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: I need a HUGE favor
All of the rear diffs 10bolt vs 12bolt are the same dimensions. It should be 62.5" if memory serves correct. I can confirm that when I get to the garage. As for box measurements, I can't get those for you, since my be isn't on/near.
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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#3 | |
Senior Member
Join Date: Feb 2003
Location: Wichita KS
Posts: 610
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Re: I need a HUGE favor
Quote:
Thanks for that info anyways. As you can imagine, I'm just trying to get a number as accurate as possible, because I DONT want to have to narrow or widen this thing later if it doesn't fit ![]()
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~Steve~
Friesen High Performance Auto and Graphics Toy: 87 Shortwide, 406 smallblock with a little boost My 87 buildup Daily Driver: 99 Sierra SLE 4X4. Black on Black and harder than hell to keep clean. ![]() |
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#4 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: I need a HUGE favor
I changed the rear ends in one of the trucks (86 Chevy shortbed) that I have here and the 10 bolt and the 12 bolt were the same length. The difference is the input shaft for the differential is a little shorter than a 10 bolt and the driveline may not be exactly right after a change.
By the way anyone need a complete 10 bolt (3.08) rear end. Brake drums and all. It is in good shape, I removed it to go to the 12 bolt posi unit and it is just sitting here in the middle of Knasas. Last edited by piecesparts; 11-11-2005 at 06:44 PM. |
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#5 |
yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,826
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Re: I need a HUGE favor
Steven, I just went out and measured my 12 bolt, it measured EXACTLY 64" from outside of each drum to the actual wheel mating surface, not the bumps outs that are on the outside lip of the drum (that don't actually touch the wheel).
I measured 56 3/4" to the inside of each drum, and 3 5/8" for each drum thickness. I can't do a box measurement either since my bed is off as well.
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Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale Last edited by bigblock73; 11-11-2005 at 10:55 PM. |
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#6 |
Until Seventy Times Seven
Join Date: Feb 2005
Location: Rocky Mountain Front Range
Posts: 1,301
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Re: I need a HUGE favor
87Shortwide-
It's been a while since I measured it, but the last time I checked, the distance between the mounting surface on the drum and the inside of the fender lip was/is 6 3/4". I didn't measure both sides, but I assume the axle is sitting centered under the frame/box (shortwide).
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boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin... |
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#7 |
Senior Member
Join Date: Feb 2003
Location: Wichita KS
Posts: 610
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Re: I need a HUGE favor
Well, I ended up going off of wheel spacing instead. I measured from the drum-mating surface of each set of wheels (old and new) to the front of the rim, then subracted the difference.
Dropped the rear off today, it'll be done next week sometime. Heres the lowdown on it. -GM 12 bolt w/ 3.43 gears -Narrowed 5" overall (2.5 from each side) -Getting a set of Strange hardened axles -it's already got a Powertrax locker in it, that'll stay until I grenade it -New axle tube ends (use the ford 9" bearings instead of C-clip eliminators, but these aftermarket tube ends also allow chevrolet brakes to bolt up) -3" studs All together the the narrowing, new bearings, axles, and studs all together come up to about 500$ give or take, but it'll be a nice stout 12 bolt when it's done, and the gears will be right where I want them with the turbo motor. Also done today: -Installed all the poly A-arm bushings in the A-arms -Purchased: Brake pads,new calipers, Hardware, some lines, front rotors, and front wheel bearings. I won't get the frame finished this weekend like I wanted, but I'll get it all together next weekend at the latest I hope, and it sure as hell should be nice!
__________________
~Steve~
Friesen High Performance Auto and Graphics Toy: 87 Shortwide, 406 smallblock with a little boost My 87 buildup Daily Driver: 99 Sierra SLE 4X4. Black on Black and harder than hell to keep clean. ![]() Last edited by 1987 Shortwide; 11-12-2005 at 02:06 AM. |
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