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06-04-2009, 02:50 AM
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#1 |
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Registered User
Join Date: Jan 2009
Location: Athens
Posts: 10
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Axle swap?
Alright guys, so I have an 86 K10, running 33's with stock 3.08 gear ratio
 and being pushed by the stock 305/new 700r4. A buddy of mine is getting rid of his half tons out of his 86 blazer (got himself a 14 bolt  ) and is willing to sell them to me for around $500. They're not too old on the rebuild and have 4.56s with Detroit lockers. I'm not the most knowledgeable on all this and would really appreciate any help. Budgets an issue for me so I'm wondering how this will drive and if Ill suck down too much gas. I'm mostly country roads but do the occasional highway cruising and offroading. I plan on going to 35s when Ive saved up for them, but if anyone could tell me how this and my future set up would be I'd be very appreciative 
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Big Red '86 Silverado K10 305/700r4, 4" Suspension, 35" Toyo MTs, 4.56s Old Blue '84 GMC Sierra 2WD, long bed, worn out 305 Not a looker but it'll get the job done |
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06-04-2009, 07:29 AM
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#2 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: Axle swap?
Well...I wouldn`t want 3.08s & o/d,even with stock sized tires,and especially with a 305.How does it drive now with 33s?On country roads,do you evn run in o/d?My`90 Blazer had 33s,350,and 3.08s.It was a 4spd manual and it was like having o/d.I used granny more than I ever would if it had lower gearing.
I`d want those axles for $500 if I had your truck.It would probably make more sense with 4.10s.But,with 35" tires and 4.56s you`ll be at about a 4.10 final ratio.Add in the o/d and you`re doing pretty good.There`s the weight and added rolling resistance to figure in compared to cars.So,you need some kind of grunt in the gears or the taller ratio will cost you in gas/wear`n`tear just getting going.Especially with a not-so-torquey motor.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-04-2009, 08:00 AM
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#3 |
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Registered User
Join Date: Feb 2000
Location: Modesto, CA
Posts: 1,842
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Re: Axle swap?
your 86 rear is probly a 10bolt, yes?
So your buddy is getting a 14bolt and selling his "1/2ton" ? do you know what they are? Sounds like you need a 14bolt too   
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1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks
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06-04-2009, 11:28 AM
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#4 |
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Registered User
Join Date: Jan 2009
Location: Athens
Posts: 10
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Re: Axle swap?
Special-K:
The 33s with the 3.08 is not by any means desired but isn't that horrible, she's by no means quick on takeoff but once you get her going she cruises very well. I usually will use o/d unless the road is pretty hilly. Yeah had I not found this deal from him 4.10s probably would have been my first choice to pair with the 35s. Ive heard of a few folks running 4.56s with them and not many complaints. Thanks for the help though, I'm leaning more towards doing it now Burt4x4: Yes, I've got 10 bolt front and rear and these axles are as well. He's turning his blazer into a rock crawler and wanted to go big or go home I guess hah. I would love to get ahold of a 14 bolt rear and a Dana 60 front but moneys too big a constraint for me.
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Big Red '86 Silverado K10 305/700r4, 4" Suspension, 35" Toyo MTs, 4.56s Old Blue '84 GMC Sierra 2WD, long bed, worn out 305 Not a looker but it'll get the job done |
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06-04-2009, 01:35 PM
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#5 |
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Registered User
Join Date: Feb 2000
Location: Modesto, CA
Posts: 1,842
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Re: Axle swap?
Well I would getum then and run the higher gears, get some power back to the tires&ground. Plus your current axels will be a source for parts
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1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks
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06-05-2009, 10:23 PM
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#6 | |
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Registered User
 Join Date: May 2009
Location: Bel Air Md
Posts: 39
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Re: Axle swap?
Quote:
Id buy them for $500 bucks its a steal.... Just figure: ring and pinion $200 a set/ youll need two sets... Install kits area $100 you need two.. figure a guy that knows what he's doin setting a rear up will want $400 a rear... I raen 4:56 in a truck i had I had 42's under for a while it was too mych tire for the gear.. Then I went back to a 35 for a while, it was a torque(y) set up... I then put a 39.5 Irok radial on and it was dead nut.. Youll be very happy with the 4:56's..... Last edited by silverpete; 06-05-2009 at 10:23 PM. |
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