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anyone ever run these axle ratios

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1BAD88

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I just rescently fried my rear end in my blazer .I looked into a rebuild and it is way to much money for me right now so I bought a used axle and put it in my truck .But now my front axle is 3.42 and the rear is 3.73 .is this combo within a reasonable difference? has anyone run these ratios without transfer case detonation?what problems can this cause? thanks for any info...................running 33's on stock lift

1988 k-5 blazer 5.7
 
BIG difference.

Even offroad your rear wheels will be spinning more than the front making 4WD kinda pointless.

Probably should not use 4WD at all IMHO.

Dave

Rehab is for quitters.
<a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>91 Blazer and Toys</a>
 
I say play in 2 wheel, you get almost stuck drop it in 4 and dig out, when you hit solid ground again back into 2. If ya really gotta play. Definitely stay out of 4 on any solid ground. Just my opinion.

Pics at <a target="_blank" href=http://community.webshots.com/user/jlblmkh>http://community.webshots.com/user/jlblmkh</a>

(Formerly heaj1)
Swimmin like a rock, slingin like a stock, but not for long.
 
i agree. i ran the same way for a few months and did not have any problems cause i stayed in 2wd until almost stuck, then right back to 2wd.
if you try to run in 4wd any distance at all on hard ground your gonna kill something real fast
chris

It needs a bigger motor.
what's in it now?
doen't matter it NEEDS A BIGGER MOTOR
89 350tbi/700r4h/np208/4.11's
 
Well you could always run your 33"s in the back and 30" tires on the front
smile.gif


But seriously. The difference between the front and rear ratios should be less than 10%

<a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

<font color=blue>Nevada... Where the pavement ends and the west begins
 
I once ran 3.23 up front and 4.10 in the back. I played in 2wd till I got stuck and if that was the case it was slick enough then that who cares if you spins faster, at least they spin. Only 2 times I put in 4wd to play, once in 2 feet deep snow to see how far we could go and once on really loose dirt hills.

'86 GMC shortbox 3/4 ton
<a target="_blank" href=http://www.picturetrail.com/mnorby>www.picturetrail.com/mnorby</a>
 
No, I think everyone is correct. That is too big of a difference.

On another note, I know some mud racers use lower gears in the front and higher gears in teh rear. This causes the front tires to spin faster, thus improved steering in mud and the front tires will pull slightly. Pretty cool huh?

My Truck <a target="_blank" href=http://www.community.webshots.com/user/nicksm79>http://www.community.webshots.com/user/nicksm79</a>
 
Actually 3.42 and 3.73 are within 10% (3.42x1.1=3.762) ... I thought the diff was suppose to be more like 1 or 2%. Ten just sounds way too high to me.
 
Yeah, 10% is way too much. Even uneven treadwear front and rear will make it run like crap on the road.

But how about using a 203 T-case and just never put it in "lock"? Think about that for a while...

<font color=green>Want to see a happy guy? Look at me as soon as my new wheels and tires arrive!</font color=green>
 
Yup 3.42 and 3.73 are within 10%
I have always been told you can get away with 10% between axles if you keep it in the dirt. Wont work on the street.
Mudders do it all time.

<a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

<font color=blue>Nevada... Where the pavement ends and the west begins
 
Put 32s up front and it will put it real close to the same effective ratio.

86Jimmy 4"&35"s,87Burb 4"&33"s,69Firebird 525 hp,and 70GTO, 65 Howard V-drive PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My toys</a>
 
thanks for all the info I think I will run it like this for a while till I get my front ring-pinion to match .I really like the 3.73 compared to the 3.42 my truck launches off the line now and is great on the highway and improved gas mileage too......

1988 k-5 blazer 5.7
 
i got a set of 3.73 gears for the front if he is interested.
D44. i would have to pull them but i can do that.
e-mail or pm me if he is interested.
Grant

take me drunk, i am home
www.geocities.com/seventy4blazer/parts4sale.html
 
Rear wheels will spin SLOWER with lower gears, not faster.

I would not lock it in 4 hi unless absolutely necessary. I had 4.10s in back and 3.08s up front and locked it in once because I was really really buried.

Axles must match within 2%.

Tim
'84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
 
I had 2.73 front and 3.73 rear and in 4hi it would just bind up. I have a friend who had the 3.42 front and 3.73 rear and a 203 w/ part time kit he said his truck never climbed as well and really liked that setup.
 
True dat. My bad.

Dave

Rehab is for quitters.
<a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>91 Blazer and Toys</a>
 
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