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#1 |
Registered User
Join Date: Mar 2013
Location: Washington
Posts: 238
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I have a 3/4 ton front Axle with locking hubs. It has an 8 Lug, The Back Axle as I know is a GM Corporate 14 Bolt with a 3.73 Gear Ratio and is a 1/2 ton, Like I have said this rig has never been off road, However, I don't know what any of this really means, A friend of mine has said that having a 1/2 ton axle is the way to go, but I am not sure how to come about this. Is there anyway I could Have some Help to figure this stuff out?
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RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying ![]() |
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#2 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
Quote:
8 Lugs are 3/4 or one ton. I wouldn't recommend putting 1/2 ton axles in your 3/4 ton truck and I don't know why your buddy would recommend it either. Makes zero sense. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#3 |
Registered User
Join Date: Mar 2013
Location: Washington
Posts: 238
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
I have a 1979 GMC Jimmy High Sierra, with a Corporate 14 Bolt 3/4 ton back axle.
It has a 1/2 ton Front Original Corporate 10 Bolt 1/2 ton Front axle, I am guessing the guy I bought my Jimmy Full Sized from converted the 10 Bolt axle from a 6 Lug to a 8 Lug, because It does have other parts on it. Not to mention a 1987 Chevy Suburban Front Hood, Fenders and Bow-tie Grill. I previous owner of My Rig also removed the original Transmission which was Automatic, And is now a 4 Speed with a 205 Transfer Case. This Rig has been identified as a K5 Blazer, But On my Registration it States a 1979 Jimmy High Sierra. ![]() ![]() ![]()
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RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying ![]() |
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#4 |
Registered User
Join Date: Sep 2009
Location: Beaverton, OR from WA State
Posts: 1,515
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
It is quite the mutt. As you pointed out, you have an 81+ front end (hood, fenders, core support), with at least an 83+ grille. Axles swap in and out of these with ease...the Corporate 10 bolt front could be original, but it has had at least the 6-lug hubs swapped for 8-lug ones. You still have the '79 front bumper.
If your registration says it's a GMC Jimmy then it is a GMC Jimmy. Same thing is the K5 Blazer, just better looking (I'm biased, I like the three letters). What do YOU want to do with it, is the question? You expressed concern about the axles, why? Your friend who talked about axles is a little off the mark... Your front end has two more lug studs on each side over the stock 1/2 ton axles, think of that as irrelevant. Your rear axle though, tremendous upgrade over the original 1/2 ton axle. It is much stronger, has much better brakes, and is often times the most preferred upgrade for these trucks.
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Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96 |
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#5 |
Registered User
Join Date: Mar 2013
Location: Washington
Posts: 238
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
I am figuring to replace the whole front back to a 73 GMC Jimmy just because I love the round halogen bulbs. not to mention it looks cooler then the slanted 87 Suburban. I want a full original High Sierra Jimmy from 1979, when they rolled off the assembly line.
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RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying ![]() |
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#6 | |
Registered User
Join Date: Sep 2009
Location: Beaverton, OR from WA State
Posts: 1,515
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
Quote:
Posted via Mobile Device
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Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96 |
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#7 |
Registered User
Join Date: Mar 2013
Location: Washington
Posts: 238
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Re: Question's About Axle Size, Ratio's, And What Should Be Where.
Thank You Devin, I figured that its gonna cost me around $15,000 to get the rig to the way it used to look like, but it being a 79 High Sierra Jimmy, I prefer the look from the 73 Jimmy more.
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RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying ![]() |
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