Axle Experts....quick question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

NorthWolf33 · 02-01-2005, 01:50 AM

I was readin through the other posts and got confused on axels and numbers and stuff soooo.....

does anyone know off the top of their head the axle ratio for a 90 Blazer...700r4 trans w/350 small block? and what a good axle combo would be for it if I plan on muddin every now and then, but mostly a daily driver for now? its a beefed up 350 too so its got some rpetty good horse.

GenIIIShorty · 02-01-2005, 02:03 AM

if it's a stock, untouched axle, it should have a tag on it somewhere, telling the ratio...also, prime axle ratio depends on tire size

Americanrider · 02-02-2005, 12:37 AM

Check the glove box door tag and write down any codes that start with the letter "G" then call the chevy parts counter guy at your local dealer, I know my code on a 91 PU was GUU, it was in the high 2's .... It's been a while & I sold that truck a few years back.

alf4444 · 02-02-2005, 10:49 PM

Quote:

Originally Posted by NorthWolf33

I was readin through the other posts and got confused on axels and numbers and stuff soooo.....

does anyone know off the top of their head the axle ratio for a 90 Blazer...700r4 trans w/350 small block? and what a good axle combo would be for it if I plan on muddin every now and then, but mostly a daily driver for now? its a beefed up 350 too so its got some rpetty good horse.

We could help with a suggestion for gear ratio if we had more info like tire size

**kwmech** · 02-03-2005, 12:16 AM

About a 90 percent chance of being 3.73s

u2slow · 02-03-2005, 01:09 AM

3.42 or 3.08 are very common in these last few years of the K5 Blazer/Jimmy.

The 'G' codes from the glovebox indicate a ratio. Post the codes here for decipering our you can probably Google them up yourself.

NorthWolf33 · 02-03-2005, 02:15 AM

oh sorry tire size right now are 33's on a 4in lift

alf4444 · 02-03-2005, 10:15 AM

i think 3.73 would be fine thats what I'm running on my 97 with 33"s

784X4GUY · 02-03-2005, 11:12 AM

I have 33" on my 78 and it has 4.10's in it. It gets down pretty good when you got it in the mud...Later Mike

sleekster · 02-04-2005, 05:39 PM

if your running a 700r4 and 33" tires go with a 4.56 i had the same combo in my suburban 350/700r4/33"tires/4.56 ran like a raped ape, plus at 60mph you are only running 1950 rpm and at 75 2437rpm, you will probably get better gas mileage around town due to the mechanical advantage your gear will give you. also if you ever want to step-up to 35 or even 36 tires you will still have enough gear which is what i did.

02-01-2005, 01:50 AM	#1
NorthWolf33 Registered User Join Date: Jun 2004 Posts: 80	Axle Experts....quick question I was readin through the other posts and got confused on axels and numbers and stuff soooo..... does anyone know off the top of their head the axle ratio for a 90 Blazer...700r4 trans w/350 small block? and what a good axle combo would be for it if I plan on muddin every now and then, but mostly a daily driver for now? its a beefed up 350 too so its got some rpetty good horse.

02-01-2005, 02:03 AM	#2
GenIIIShorty JUNK COLLECTOR!!!!! Join Date: Jan 2005 Location: Spokane, WA Posts: 514	if it's a stock, untouched axle, it should have a tag on it somewhere, telling the ratio...also, prime axle ratio depends on tire size __________________ baby The dark side! 2000 XLT PSD F-250 4x4! Offroad package 1970 C10 Short-step soon to be short fleet, maybe? Corvette in truck's clothing in work! Corvette IFS, IRS, TPI and Doug Nash 4+3

02-03-2005, 01:09 AM	#6
u2slow Web Wheeler Join Date: Jan 2000 Location: BC, Canada, eh? Posts: 388	3.42 or 3.08 are very common in these last few years of the K5 Blazer/Jimmy. The 'G' codes from the glovebox indicate a ratio. Post the codes here for decipering our you can probably Google them up yourself. __________________ '66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap

02-03-2005, 10:15 AM	#8
alf4444 Registered User Join Date: Dec 2002 Location: taylorsville, UT Posts: 778	i think 3.73 would be fine thats what I'm running on my 97 with 33"s __________________ 2011 CCSB GMC 2500HD DMAX 73 GMC 3/4 ton 4x4 96 Chevy 1500 STD Cab Shortbed Z71 Owner of WickedWolfRC.com

02-03-2005, 11:12 AM	#9
784X4GUY Did someone say MUD? Join Date: Aug 2003 Location: Pullman,WA Posts: 1,089	I have 33" on my 78 and it has 4.10's in it. It gets down pretty good when you got it in the mud...Later Mike __________________ Im in the market guys...so keep ya eyes peeled -------------------- Mini trucks are for guys who cant get it up!

02-02-2005, 12:37 AM	#3
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Check the glove box door tag and write down any codes that start with the letter "G" then call the chevy parts counter guy at your local dealer, I know my code on a 91 PU was GUU, it was in the high 2's .... It's been a while & I sold that truck a few years back.

02-03-2005, 12:16 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	About a 90 percent chance of being 3.73s

02-03-2005, 02:15 AM	#7
NorthWolf33 Registered User Join Date: Jun 2004 Posts: 80	oh sorry tire size right now are 33's on a 4in lift

02-04-2005, 05:39 PM	#10
sleekster Registered User Join Date: Feb 2005 Posts: 16	if your running a 700r4 and 33" tires go with a 4.56 i had the same combo in my suburban 350/700r4/33"tires/4.56 ran like a raped ape, plus at 60mph you are only running 1950 rpm and at 75 2437rpm, you will probably get better gas mileage around town due to the mechanical advantage your gear will give you. also if you ever want to step-up to 35 or even 36 tires you will still have enough gear which is what i did.



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