rear axle width question - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Chevy
Notices

Reply
 
Share Thread Tools Display Modes
Old 07-16-2007, 10:49 PM   #1 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
rear axle width question

ive got a few simple (hopefully) to awnser questions.

what is the width of a 14bolt in a 1986 3/4 4x2 pickup, and a 1989 suburban.

i know the suburban (88+pu) is wider but isnt it just wheel backspacing? also is there a difference in spring perch spacing?

the carrier split in my suburban when i was going down the freeway a few weeks ago, ive got it all tore apart ready to get a new carrier and gears but i know i can get a 14 bolt from a 86 3/4 pretty cheap (9.5 or 10.5 he hasnt brought me pictures yet) either one should be a upgrade for my suburban.

do i need to move the spring perches (not hard to do at all)? i know i will need to use a different u joint and what not but can i use the stock 3/4 wheels on my suburban with no ill effects?
mrbigshot is offline   Reply With Quote
Old 07-17-2007, 01:11 AM   #2 (permalink)
Registered User
 
GMCTruxrule's Avatar
 
Join Date: Aug 2005
Member # 51243
Location: Tropical Paradise
Posts: 3,437
Not quite sure where you are going with this, but which 14 bolt do you currently have? and why are you not just replacing the carrier instead of replacing the whole damn axle?
And a 14 bolt SF is not an upgrade, sorry. And remember, they come in two different lug versions, 6 and 8, so don't buy something sight unseen.
__________________
[COLOR="Lime"][B]1999 Chevy K3500, 5.7/4L80E/14FF/stock/stock/stock[/B][/COLOR]
GMCTruxrule is offline   Reply With Quote
Sponsored Links
Old 07-17-2007, 06:50 AM   #3 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
a 14sf is much stronger than the 10 bolt the truck has. its 8 lug but that fine with me. i want to know if the spring pad distance is the same between 87 and older trucks and 88 and newer. i want to move to a dana 60 in the front some time in the future so 8 lug is great.

if i were running a light weight truck a 10 bolt would survive, its a big heavy truck on 35's.

no yards have a 88+10 bolt with 3:73's around here. even if they did it would be between $400 (open) and $550 (posi). a 10 bolt isnt worth much more than a $100 complete to me. its cheaper for me to install a new carrier and gears (200-250) than to buy a complete rearend from a yard. who knows mabey it will go 3 month and go like the old one. i hate the though of putting even 250 into it knowing it basically living on borrowed time anyways.

i will find out if its a 14sf or a 14ff axle when he takes pictures later this week. im hoping its a ff but being a 4x2 its prob the sf.

Last edited by mrbigshot; 07-17-2007 at 06:51 AM.
mrbigshot is offline   Reply With Quote
Old 07-18-2007, 06:37 PM   #4 (permalink)
Granite Guru
 
44boggers's Avatar
 
Join Date: Feb 2006
Member # 67299
Location: Vermont
Posts: 722
I am not sure about the 10 bolt pad width but for a sf 9.5 inch the pad width is 42.5 inches and a ff 10.5 inch is 40.5 inches. i am guessing it will be the sf in that 86 4x2. my 3/4 ton 86 4x4 had a 95 inch sf and i just swapped it with a ff and had to cut and move the perches in.
44boggers is offline   Reply With Quote
Old 07-18-2007, 06:52 PM   #5 (permalink)
Oilfield Trash
 
Red Chevy's Avatar
 
Join Date: Jan 2006
Member # 64526
Location: Many, Louisiana
Posts: 1,536
The ff probably came out of a 1 ton with the narrower pad width.
__________________
'94 k1500, 1-ton SAS 44" boggers
'97 tj, 2.5/auto, rubi 44/5.13/spartan, 8.8/5.13/spool,
38.5/11/16 boggers, awaiting 5.3 swap.
Red Chevy is offline   Reply With Quote
Old 07-18-2007, 08:32 PM   #6 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
moving the perches wouldnt be to much of a problem. im just going to redo the 10 bolt for now. ill get a 3/4 parts truck some day and get the 14ff/60 combo from that.
mrbigshot is offline   Reply With Quote
Old 07-18-2007, 08:33 PM   #7 (permalink)
Registered User
 
Join Date: Mar 2006
Member # 68512
Location: Springfield, OR
Posts: 1,158
Quote:
Originally Posted by mrbigshot View Post
no yards have a 88+10 bolt with 3:73's around here.
you need to broaden your horizons. look for any 73-91 front 1/2t axle with 3.73's
__________________
89 s10, flogged regularly
94 burb, tow rig

Last edited by Donahue; 07-18-2007 at 08:34 PM.
Donahue is offline   Reply With Quote
Old 07-18-2007, 09:45 PM   #8 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
73-87 axles are 28 spline (so i cant change the carrier) and 5 inches narrower.
mrbigshot is offline   Reply With Quote
Old 07-19-2007, 10:03 AM   #9 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95794
Location: sudbury ontario
Posts: 1
I am surprised that no one has mentioned this but the body style change over for the suburban wasnt in 88 like with the pickups but in 92. So axle width should be the same as the pickups till 87.
va3gjs is offline   Reply With Quote
Old 07-19-2007, 03:48 PM   #10 (permalink)
Registered User
 
Join Date: Mar 2006
Member # 68512
Location: Springfield, OR
Posts: 1,158
Quote:
Originally Posted by mrbigshot View Post
73-87 axles are 28 spline (so i cant change the carrier) and 5 inches narrower.
oh, i was thinking you were talking about front axles.
__________________
89 s10, flogged regularly
94 burb, tow rig
Donahue is offline   Reply With Quote
Old 07-19-2007, 08:55 PM   #11 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
Quote:
Originally Posted by va3gjs View Post
I am surprised that no one has mentioned this but the body style change over for the suburban wasnt in 88 like with the pickups but in 92. So axle width should be the same as the pickups till 87.
i origionally thought that as well but i checked at work (car quest) and the sub and c/k series pickups all changed in 88. i also have 30 spline axles, that was never offered in a 1/2 prior to 88. the axles grew but im fairly certon it was only a backspace issue. you look as the ifs pickups with the wheels that dont fit and poke real bad, they fit fine on a 87 and older. people ordered the wrong wheels.
mrbigshot is offline   Reply With Quote
Old 07-19-2007, 09:51 PM   #12 (permalink)
Registered User
 
odin544's Avatar
 
Join Date: Apr 2004
Member # 29622
Location: Kennewick, Washington
Posts: 1,788
Quote:
Originally Posted by mrbigshot View Post
moving the perches wouldnt be to much of a problem. im just going to redo the 10 bolt for now. ill get a 3/4 parts truck some day and get the 14ff/60 combo from that.
D60 never came in a 3/4ton. and if you want 14 bolt info refer to the 14 bolt bible. http://pirate4x4.com/tech/billavista...ble/index.html
odin544 is offline   Reply With Quote
Old 07-20-2007, 08:17 AM   #13 (permalink)
Registered User
 
Join Date: Mar 2005
Member # 44659
Location: Mtn Home, Idaho
Posts: 1,247
Ok. so I am super confused.

10 bolt rears are 30 spline. They were in Blazers and Suburbans from the 81ish to 91.

Only the half tons and 3/4 tons changed in 88. Some one tons in 89 were the NBS, but some stayed till 91, specifically the k30 four doors for sure.

Any rear axle from a 73 to 91 full size k5 or Suburban will work for you, as well as 73 to 87 K10 or K20. One tons have narrower spring perches so they are not a direct bolt in.

And I am really confused by the "5 inch narrower" statement.
__________________
88K5 14b/d60 Self destruct mode switched to on! 97 Xcab Dodge crawler in the works. 77fj40/94fzj80
lumpdog is offline   Reply With Quote
Old 07-20-2007, 08:49 AM   #14 (permalink)
Oilfield Trash
 
Red Chevy's Avatar
 
Join Date: Jan 2006
Member # 64526
Location: Many, Louisiana
Posts: 1,536
The 5" narrower would most probably be refering to the spring pad width.
__________________
'94 k1500, 1-ton SAS 44" boggers
'97 tj, 2.5/auto, rubi 44/5.13/spartan, 8.8/5.13/spool,
38.5/11/16 boggers, awaiting 5.3 swap.
Red Chevy is offline   Reply With Quote
Old 07-20-2007, 04:18 PM   #15 (permalink)
Registered User
 
Join Date: Jul 2007
Member # 95575
Posts: 44
the overall axle width changed. ive been down that road when i went to the yard looking for a rear end. the 87 and older were narrower overall. i found one for $85 but it was narrower than my current 10 bolt. once i seen it was narrower i didnt bother checking pad mounting location. with my wheels on the narrow rear i would have had to cut the wheel tubs out for the tires to clear.

the 87 and older 10 bolts in blazers, suburbans, and pickups were 28 spline.

i origionally thought they were all the same, if they were i wouldnt be where i am now.

Last edited by mrbigshot; 07-20-2007 at 04:18 PM.
mrbigshot is offline   Reply With Quote
Old 07-20-2007, 04:47 PM   #16 (permalink)
Registered User
 
Join Date: Mar 2006
Member # 68512
Location: Springfield, OR
Posts: 1,158
Quote:
Originally Posted by mrbigshot View Post
the overall axle width changed. ive been down that road when i went to the yard looking for a rear end. the 87 and older were narrower overall. i found one for $85 but it was narrower than my current 10 bolt. once i seen it was narrower i didnt bother checking pad mounting location. with my wheels on the narrow rear i would have had to cut the wheel tubs out for the tires to clear.

the 87 and older 10 bolts in blazers, suburbans, and pickups were 28 spline.

i origionally thought they were all the same, if they were i wouldnt be where i am now.
i ran into a similar problem with my s10 axle stuff when i was looking for spare shafts. it seems that the 4x4's have wider axles than the 2wd ones, and from what i can tell, it is because of the huge offset of the factory rims. one could make the assumption that when the full size's went to IFS, they also went to those huge offset rims, and a wider rear to compensate. just a thought.

also, k30's were not known as k30's past the mid 80's, but that is a moot point. the only solid axle trucks were k5, burbs, and 3+3's (crew cabs) past 87. however, that does not account for fleet, or special order stuff. and i know for sure that burbs would have been 1/2t or 3/4t through 91.

and a 10b rear has no place in a full size period. at least get a 6 lug sf14.
__________________
89 s10, flogged regularly
94 burb, tow rig
Donahue is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 06:46 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.