what rear should i used wiht a 355

[Duckmobile94]

i have a 94 s-10 with a 355 that has 450Hp at the flywheel and i have a th350 tans what rear should i use to put all 450Hp to the ground<A HREF="mailto:null">null</A>

[schitthedd]

Damn! im jealous, you\'re not still runnin leaf springs are ya? you should probably convert to coil overs er something. anywells, i guess the good ol\' ford 9\" would probably get her done.

[badass10]

nice..well id say a ford 9 too but there pretty expensive if you can even find one.

id say go with a standard gm 12 bolt, with 4:10\'s, or even 4:56\'s depending on whether or not this a street vehicle..if it is your gonna be crusin at 60 mph at like 5000 rpm, its not gonna be comfortable and its gonna guzzle gas, id go with the 410s.

[knudsonm]

The 8.5\" out of the 4.3HO 5spd s-10\'s is more than strong enough to take the power. The only problem is that most came with 3.08 gears.

[4more]

i have seen s10s with stock leaf spring setup in the 11s in the 1/4 .also the ford 9 in will take a few tenths off your 1/4 mile time the take more torque to run.but they are stronger

[ZZ4Blazer]

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On 2002-06-15 17:30, knudsonm wrote:

The 8.5\" out of the 4.3HO 5spd s-10\'s is more than strong enough to take the power. The only problem is that most came with 3.08 gears.

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Those also came with a factory locker too, so no need for a separate posi unit. I wouldn\'t go over 4.10\'s for gears if you drive that on the street.

[franksandbeans]

get a 9 inch. if you cant find one you need to see an eye doctor. i have a half dozen of them my self, and my dad has about a dozen or so. they are good for future projects or to sell to others. if you are willing to pay the shipping ill hook you up. open with drum brakes, posi with discs, i can find it.

[BNKRPT]

I got a 350 trans with 3.73s in the rear and i cruise 55-60mph @ 3,000 rpm.

[kevster]

maybe i am just missing something here all together. I have a 7.5/8 rear in my truck and i am gonna run it. I have no doubts in my mind either. Heres my .02. F-body come with the same rear axel setup for the most part yes/no I have a buddy that we been workin on his car pushin an easy 600hp and he is deep in the 11\'s. The only thing holding us back is the tranny and soon as thats goin 10\'s no prob. Guess what 7.5/8 w/3.73 screw this ford 9inch crap!!! http://www.s10v8.com/images/smilies/icon_eek.gif http://www.s10v8.com/images/smilies/icon_eek.gif http://www.s10v8.com/images/smilies/icon_eek.gif

[whiner3]

i agree my buddy has a 383 stroker 225 shot of nitrous and he run\'s mid 11\'s in his trans am... gues what... it\'s a 7 5/8\'s diff just like the 88 and newer s-10\'s he\'s got a 4.11 posi, personally with the 3 speed trans i\'d probably go with about a 3.42 diff maybe a 3.73...with the voerdrive you can get away with a 4.10 no problem though... and i totally a gree if you can\'t find a ford 9\" you have to be blind i used to work in a wrecking yard and they must have had at least 100 of them.... all the ford half tons had them.. most ford fullsize cars... the fullsize vans hell almost every ford out there had a 9\" in it

[BadBowtie]

Im still using the original axle ans leaf springs on my 1987 s10 4x4 with a 355 and 700r4 with 3.73 gears fron and back.

The suspension was lifted a 4.5\" in the back with a 1.5\" body lift.

The only problem i have is i still do some street racing (yes street racing a lifted s10, i love the look on those stupid imports when i smoke their ass!) and have broken a leafs on either side, no problem wen to a spring shop the and swaped out the broken leaf, well no i have another broken leaf on either side. Im guessing from too much axle wrap on hard launches!!!!

[whiner3]

slap a srt of traction bars on... it should stop your leafs from breakin... only problem is it\'ll look kinda stupid on a lifted 4x4

[basementdweller]

Ya, Ford 9\'s are WAY OVERRATED!A Rear is only as strong as the parts you put in it. My buddies regal has a 12 bolt and it runs 8s PERIOD!

[xtreme_won]

what rear end you are going to use all depends on how you will be driving the vehicle. If it is gonna be for a dialy driver and just to have some fun the your stock rear end is just fine. You might want to look into an auburn posi or a locker of some sort. If you plan on pushing some wild amounts of power 500+ and will be drag racing it alot then I would look into a stronger rear end like the bigger 8.5 GM 10 bolt, ford 8.8, gm 12 bolt, ford 9 and the gm 14 bolt. The later two don\'t even need to be used unless your gonna be pushing like 1000+ and plan on punching it whenever you take off. There really is no need for a rear end that big on a street driven vehicle. Only reason for a having a rear end of that magnitude is if you got plenty of torque. Don\'t overlook the axles and driveshafts when looking at that strong of a rear end.



Now onto the gearing this is the engine rpm for given road speed of 55mph with a 26\" tall tire and a transmission gear ratio (overdrive) of .700



3.05 1500

3.23 1600

3.42 1700

3.73 1900

4.10 2000

4.56 2300



So by those numbers you should be able to pick out the final gear ratio of your rear end all dependant on how you will be driving. A good posi or locker will always help also. wo will stringer internal gears

[rudedogg]

maybe i like livin on the edge but a heavy 9\" rearend is overkill for that hp level.my old 77 camaro had a pretty nasty rat in it it ran 12.20s with 308s,no posi,8.5 original rear axle,i installed 4.11s gm posi,and goodyear eagles,slicks,it ran 11.30s,put moseur axles with eliminators,changed the cam and went to a dominator added more stall 4800 and went10.23 @136.plenty tq and hp

[Zack]

If you\'re making 450 horse at the flywheel, it don\'t matter what rear you use, you\'re never going to get all 450 horse to the ground.

[xtreme_won]

getting that power to the ground is only part of the issue. The other more important part is a having a rear end that will not break. Rear end meaning everything like the center, gears, bearings, posi/locker, axles, and things of that nature

[Bustinwood]

you can do a 9 inch cheaper then a 7 5/8 to bullet proof a 7 5/8 the axles are like 250 then the c clip eliminators are another 150 and then the support cover is 150.00 hell i bought my 31 spline nine inch for 60 bucks with drums and all but if you do a nine inch you have to make a lot of mods if it come out of a truck or van because the axle tube are 3 1/4 all the traction bars that every one make are for 3\'\' dia housings so its good to know a machinest

[spacecadet]

My favorite gear w/sbc is 3:73\'s! They provide good power to the ground with a higher rpm range, yet are still very streetable. My big block RA TA has a 12 bolt w/3:55\'s which helps keep the rr\'s down a little bit. My first sv8 I had put the 4:11\'s w/ lincoln locker. 0 to 70 was amazing!!! but @ 75 it sounded like the motor was going to hmmm right out of the truck!!! FL tire was the only tire that seemed to last. Maybe it was because it didn\'t touch the ground as often. - I wish I could have seen my own truck pull the wheel but I was to nervous that a friend would \'blow up\' my motor showing me.



An s10 rear if you plan on it as a dailey driver, 12 bolt would be better, but cost and avaliblity would be a question and if you plan to race, then 9\" ford. The center section is real easy to swap if neccassary. Or have a center w/ street gears and one for the track only. Its up to you how you plan on using it.

[td_iwhs]

just stick with your stock rear end and dont worry about blowing all that money on a different one. Buy yourself a good posi or locker for a couple hundred bucks install it and call it a day. Why waste them money and the time if you dont have to?

[fastw23s]

If this is a street/daily driver, then buy a good posi-unit.get the 28 spline axles if you don\'t have them now. And buy a girdle /cover for your rearend. This will hold you to about 550ft lbs and a decent sticky tire, not slicks.

[350-s-10]

i agree with everyone that said not to get a new rear end, i have well over 400 hp to the rear tires and i cant get the traction down to the ground to break the damn rear! i have been trying really hard to break it and it wont go! o and by the way, its only a 7.5\" 26 spline 10 bolt! the only mod i did was a strip eaton posi unit! best $250 i spent! to get traction now i am gonna tub it out..... check out my vids thats only with 3 lbs of boost and with my street tires! with slicks and a launch it would do high 11\'s and with my other pulley! man i dont know maybe close to 10\'s! i think i am gonna get a 8.5\" from a newer s-10 though for that..... maybe a 12 bolt but we will see!

[s10spd-racer]

What rear came in a 97? I believe it is a 7.5 with 28 spline axles from factory. I know my 89 had a 7.5 with 26 spine axles and was up graded to 28 spline. That truck would leave hard with an 8\" slick under it and never had a problem with it. I think the stock rear would hold up just fine unless its getting hit with a tranny brake or good standard trans leaving with rpm. That abrupt shock is what would break the rear, I don\'t think you\'ll have any issues, plus the stock rear is much lighter.

[BA]

Guys, I have an 84 with a bored 30 over 74 350 in it. I have the 3.73 with 26 spline axles. I\'m thinking of putting the 28 spline axles in or buying an 8.8 out of an Explorer with disk brakes. Does anyone know the width difference between the 10 bolt and the 8.8. And what year s10 had the 28 spline axles? Are 4x4 and 2 wheel drive axles the same width?



Thanks

BA



BA