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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: stretch86 on June 11, 2015, 08:26:19 pm

Title: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 11, 2015, 08:26:19 pm
I have a 86 c10 suburban  and the rear end is junk im rebuilding it as i go. I was wondering if anyone knows the width (wms-wms) of the 10b,12, 14b sf and 14b ff for each set of years. I know ill have to move modify spring perches and shock mounts. I know where i can get a 00 chevy 1500 rear end its a 8.6 10b with disc brakes and was wondering how much wider it is. Only thing ive found is that the 88-98 is wider then 73-87 years and the 99-06 is wider then 88-98. I also found out that the 2wd are narrower then the 4x4.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: zieg85 on June 11, 2015, 09:25:02 pm
Don't rule out full sized GM Caprice if you can do the welding.  I've heard they will work as well.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 11, 2015, 09:59:52 pm
I cant weld but know people that can its just i cant find a rear end for truck thats usable and bolts in
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: zieg85 on June 11, 2015, 11:44:59 pm
I have one if your around Chicagoland, NW Indiana.  It is from a 86 C10 I parted out.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: blazer74 on June 12, 2015, 12:25:55 am
You should have a 10b, you can measure,  12 bolt approx 63,  14sf 6 lug 2wd approx 65,  4wd    approx 68,             14sf 8lug ?,  14 ff ?


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Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 12, 2015, 06:45:18 am
Are those widths for 73-87
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 12, 2015, 10:24:52 am
What id really like to know is how wide the 88-98 14b sf is both 2wd and 4x4 if anyone has one that they can measure
Title: rear end help. 73-87 88-99 99-06 widths
Post by: blazer74 on June 13, 2015, 12:20:42 am
What id really like to know is how wide the 88-98 14b sf is both 2wd and 4x4 if anyone has one that they can measure
that would be 65" for 2wd and 68" for 4wd. I have both and have measured them both wms to wms. You will need to move the spring perches to match yours.
You will want the 2wd version.


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Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: blazer74 on June 13, 2015, 12:24:29 am
The 14sf also have 1350 u joints. You will need a conversion u joint and also I believe the 14 sf is about an inch longer at the yoke iirc, so you may or may not run in to drive shaft length trouble.


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Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 13, 2015, 07:18:09 am
Ill be getting some measurements of mine. I was thinking about measuring yoke to axle center yesterday as i had almost forgot that itd be different. I know i have two drive shafts but does anyone know if the rear one on rear end is a slip shaft
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: blazer74 on June 13, 2015, 04:11:25 pm
SF also has larger studs on the axles,  14 mm.


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Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: Stewart G Griffin on June 14, 2015, 12:42:47 am
How much are you willing to spend and how far are you from Pennsylvania?
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 14, 2015, 07:04:13 am
Im in nh
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: Stewart G Griffin on June 14, 2015, 08:00:19 am
Well,
https://colemans.com/shop/military-vehicles/rear-axle-assembly-chevy-gmc-u-s-g-i/

Brand new!
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: Stewart G Griffin on June 14, 2015, 08:03:44 am
BTW, i think there is one in Weare for $150.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 14, 2015, 02:16:29 pm
Weare is a hike for me im in the south west corner of nh near vt and mass
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 14, 2015, 06:07:04 pm
I checked out a rear end outta a 2000 4x4 1500 and overall width with tires is 75" but was more beat up then mine. I did however find one thatll bolt up. Its a 14b ff outta a 4x4 and hes asking 180. Only thing is hes lil over hour away
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: fitz on June 17, 2015, 12:21:02 pm
Come to Mass and I will give you a 10 bolt/6 lug rear end.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 17, 2015, 01:41:28 pm
where in mass and im assuming its prob a 88-98
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: fitz on June 17, 2015, 02:27:27 pm
30 minutes south of Boston.
Your right about the years. Its from a 91 full size Blazer.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on June 17, 2015, 04:02:04 pm
Thatd bolt right up though to bad your 2.5 hours away though
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: fitz on June 17, 2015, 05:04:46 pm
Thank you anyway for letting me offer to help.

Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on July 28, 2015, 12:01:11 pm
Did the 73-87 14bsf have 6 lugs or just 8. Cause i know the 88-98 models do but couldnt fjnd anything on these
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: Jason S on July 28, 2015, 12:58:59 pm
Did the 73-87 14bsf have 6 lugs or just 8. Cause i know the 88-98 models do but couldnt fjnd anything on these

Semi-float 14 bolts are 8 lug and were under 80's model 3/4 tons. 

Are you looking for something specific or just anything that will fit? 

That was a very generous offer from Fitz. I'd be inclined to spend the drive time versus searching through salvage yards and advertisements.
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on July 28, 2015, 04:01:51 pm
I plan on tebuilding truck as i go and might build a 454 with a mild cam and dont know how long a 10b would up. My plan is to make a show/towing truck outta it
Title: Re: rear end help. 73-87 88-99 99-06 widths
Post by: stretch86 on July 28, 2015, 04:03:58 pm
Only reason i was asking abot the lug pattern is cause i know the 88-98 style have either 6 or 8 lug 14sf and i can get 6 lug conversion rotors for my c10. Unless i find a 454ss rear end cause thats a 14bsf with 5x5 pattern but seeings how rare those are i dont see it happening