Topic: 5.71 life span

[dune_it86]

I know every one hate 5.71 gears but u am getting an awsome deal on an 84 toyota with 38x14.50x16 toyo's and 16x10 weld wheels with 5.71's in it already, it will get a lot of street use as it will be my DD  I like the power that it has for the tires should i leave them and they'll be fine or sould i sell them and sacrifice the power and go with 5.29 gears tell me lif expectance on these 5.71 gears if i am nice to them. is offroad an option with 5.71, my friend that i am buying the truck from used to wheel the truck and had no problem let me kno thanks

[1Bad4Runner]

I think if it is a DD and you will not be wheeling it much it should be fine. Just my 

[dune_it86 [OP]]

I would like to think of my self as some what experenced, because sinci have had my license when i was 16 i have had 4wd's and I have a sensible foot heavy at times but mostly light and usable amount of power so hopefully they will last as you can see from my spelling i spent too much time in the woods and not enough time in school   

[MiniSimp]

as you can see from my spelling i spent too much time in the woods and not enough time in school   

Noticed that.
You don't have to be smart to wheel, you just have to wheel smart.

[blackdiamond]

Noticed that.
You don't have to be smart to wheel, you just have to wheel smart.

Educated  and Smart    (i.e. Intelligence) are two entirely different things...it does intelligence to wheel well (pun intended) in my opinion.  Sometimes changing the line by a couple of inches makes all the difference in the world.

Most I.Q. tests are a load of crap in my opinion, and don't provide a true indicator of intelligence.  I have taken some of the online ones and scored extrememly high, but it is a direct result of my engineering education and not a true reflection of my intelligence.  I have actually had classes that taught me how to do many of the things that are on the test.

As for the question posted on this thread, I don't think that breaking the 5.71 will hurt much of anything else, so run it until it breaks and then install 5.29s.
 

[BLACKDOG]

I've never wheeled with 5.71s, but I used to have 5.29s with 37"s.  They wheeled fine, so I doubt if you'd see much preformance loss if you drop to 5.29s.  You may want to consider that, simply because if you sell the 5.71s, you've got extra cash to buy 5.29s with.

Also, you are more likely to break on the trail, but don't count out on the street either. I blew up my rear end in my college parking lot, driving over their dual speedbumps.   I do havem y doubts on the set up as well, but thats where they blew, was on pavement

[unclejpl4x4]

so what dose this mall crawler look like ?

 



J/K

[IronClad]

run them. they are plenty strong.  while they have a smaller pinion  that is not the problem.. the ring gear deflects and causes the failure. the 5.71 set  has a wayyy thick ring gear  and the deflection is minimal.

[yotaboy79]

you might as well run them till they break cus your gunna have a hard time trying to find some one to buy a used set of 5:71's or even a new set

[Willy Mammoth]

Are they in a 4 cyl or V6 diff? That will most likley make the most differance. But if they are already installed, leave them and see what happens. I think for street use with biger tires you will have the advantage, because you will gain some rpm at hwy speeds.

I run 38's with 5.29's and a 65 hp engine. I can go faster in 3rd gear than in 4th gear. For me the 5.71's may be a better choice. We will soon see.

[sdiker]

This is always an interesting topic, but here is an article from someone who seems to know his stuff:

http://www.gearinstalls.com/410suck.htm

[blackdiamond]

This is always an interesting topic, but here is an article from someone who seems to know his stuff:

http://www.gearinstalls.com/410suck.htm

I am no expert, but it seems that the article over-simplified things a bit.  The angles that the teeth contact matters, plus isn't it a historical/statistical fact that people with 5.29/5.71 ring and pinion see more failures than with the stock 4.10 or even 4.88 gears?

   Why would a gear manufacture tell the customer that their low gear sets were weaker than stock?

[alwayzbroken]

If you do decide to sell the 5.71's I wouldn't waste your time trying to peddle them on any bulletin boards. Put them on Ebay first and they will sell. I was in the same situation as you. I bought my truck with 38s and 5.71s. I took out the 5.71s and couldn't sell them for the life of me until I posted them on ebay. The first day I received 7 emails and stopped the auction early. I ultimately got 600$ for them. I sold both carriers which consisted of a 8" rear third with a Detroit locker, and the front carrier was a 7.5" Ifs. I couldn't get 250$ for them previously. The previous owner told me he spent 1500$ on the gears with full rebuilds, but since I never paid anything for them I would have been happy with a lot less than 6 bills. There are plenty of uninformed people on ebay that will buy anything. But you also need to consider what the cost of replacement will be for 5.29s. The truck drove excellent with the 5.71s however, and in my opinion are a good street gear for driveability with that size of tire.

[ZUK]

I know every one hate 5.71 gears but u am getting an awsome deal on an 84 toyota with 38x14.50x16 toyo's and 16x10 weld wheels with 5.71's in it already, it will get a lot of street use as it will be my DD  I like the power that it has for the tires should i leave them and they'll be fine or sould i sell them and sacrifice the power and go with 5.29 gears tell me lif expectance on these 5.71 gears if i am nice to them. is offroad an option with 5.71, my friend that i am buying the truck from used to wheel the truck and had no problem let me kno thanks

Hey Dune...you still there?  You want to know if they will last? Key to lasting is a good gear install....sounds kinda over-simplified but that's about it. Oh ya, and stay away from low qual gears too.
Something that can be done with your abilities to possibly get the strength way up there....and that involves CBPL Carrier Bearing Pre-Load. You can do this yourself here http://www.gearinstalls.com/freshen.htm
38" tires are perfect for 571. 529 is almost as good   To put it in a nutshell, if 571 gears are installed on a pro level....then it won't be the weak link. ZUK

[dune_it86 [OP]]

my friend is going to keep the truck and he is going to run the gears so thanks for the help but now i am no longer getting the truck

[ZUK]

cool