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5.71's or 5.29's with 39.5 iroks

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Old 08-24-2010, 09:48 PM
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5.71's or 5.29's with 39.5 iroks

I have a 2002 s10 with 24" lift. it has the 4.3L vortec and an auto 4L60 trans. im runnin 39.5's with 5.29 gears on toyota axles. ive noticed the truck doesnt like goin 60. should i waste my time and try 5.71 gears instead? any help would be nice. thanks

Last edited by aj200x; 08-24-2010 at 09:59 PM.
Old 08-25-2010, 04:30 AM
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Take about 20" of lift off.

Old 08-25-2010, 07:44 AM
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Originally Posted by aj200x
should i waste my time and try 5.71 gears instead?




V6 chunks, Longfields and 5:71's FWIW....


I have a 1984 toy truck, I was running a 350 .60 over sbc last year and the front end held togather. Now going with a 400sbc. The motor builder says 600hp. How long will the front end hold up? Will longfields hold up? Will the rear hold up to?

Last edited by tried4x2signN; 08-25-2010 at 07:46 AM.
Old 08-25-2010, 09:38 AM
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That does not look like a toyota. I agree take some lift.
Old 08-25-2010, 09:39 AM
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kinda hard for him to take out lift with that link setup he's got.
Old 08-25-2010, 10:54 AM
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i wouldnt suggest 5.71s. I had a set on an old toy i had on 44s and i couldnt keep a pinion in it because theres only one tooth at a time on the pinion grabbing the ring gear which makes it really weak.
Old 08-25-2010, 11:46 AM
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What diff did you have? IFS, 4 or V6?
Old 08-25-2010, 11:48 AM
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Originally Posted by aj200x
[IMG]I have a 2002 s10 with 24" lift. it has the 4.3L vortec and an auto 4L60 trans. im runnin 39.5's with 5.29 gears on toyota axles. ive noticed the truck doesnt like goin 60. should i waste my time and try 5.71 gears instead? any help would be nice. thanks

You don't have Toyota trans gearing, but have a 200hp V6, and it doesn't like 60?

"Power output of the new LU3/LG3 engines is 180 hp (130 kW) to 200 hp (150 kW) and 245 lb·ft (332 N·m) to 260 lb·ft (353 N·m)."


Is it over revving? Revs too low?

Last edited by tried4x2signN; 08-25-2010 at 11:50 AM.
Old 08-25-2010, 12:12 PM
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couldn't ya run some different coil-overs? to lose a little lift i mean...not suggesting it...just asking

i've heard that 5.71's aren't any weaker than 5.29's...
Old 08-25-2010, 12:22 PM
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Well you've already wasted tons of money. Might as well give the 5.71's a try.
Old 08-25-2010, 12:24 PM
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I was joking. That big of a lift makes those tires look small.
Old 08-25-2010, 12:25 PM
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5.71's are weak and youll break them if you wheel it. the pinion gear is just too small.
Old 08-25-2010, 12:34 PM
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do your research...lots of people wheel on 5.71's.


if you're not sure, then have them chryo'd
Old 08-25-2010, 04:50 PM
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Originally Posted by blake.nemitz
5.71's are weak and youll break them if you wheel it. the pinion gear is just too small.



ARE 571 GEARS REALLY THAT WEAK?



Again, for what diff? The 7.5... The 4cyl, or the V6...?
Old 08-25-2010, 04:56 PM
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^^ zuk is the master..

@87yota, if you break the pinion and not the ring, more than likely something is setup wrong. the ring gear has the smaller/weaker teeth. a proper setup up is where you get your durability.
Old 08-25-2010, 05:00 PM
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or not knowing how to use the skinny pedal correctly.
Old 08-25-2010, 05:02 PM
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meh, thats helps too. although a good install and quality gears will take hundreds of revlimiter clutch dumps with no probs. ask me how i know
Old 08-26-2010, 06:11 AM
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Originally Posted by tried4x2signN
ARE 571 GEARS REALLY THAT WEAK?



Again, for what diff? The 7.5... The 4cyl, or the V6...?
yes they are that weak, you only have one tooth on the oinion engaging the ring gear at a time compared 2-3 from the 4.10, so even though the teeth are a little beefier, it doesnt matter if it can only grab one at a time, ive seen plenty break my buddies broke 3 sets then went back to 5.29 and stopped breaking them.
Old 08-26-2010, 06:14 AM
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D60 with 5.13's
Old 08-26-2010, 08:37 AM
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Originally Posted by blake.nemitz
yes they are that weak,
You know that was a link, don't you?


Originally Posted by ocdropzone
D60 with 5.13's

IIRC, the lowest a set of 60's can get is @ 7:?? something

That's Portal axle low, w/o the portal though...


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