Rear axle questions

Paint Guy · 07-01-2009, 09:33 AM

Hi all,

Hoping for expert help here. I am putting about 450 to 500 hp into my s10 extended cab for drag racing. I know I will buy a Street Fighter T-350 transmission or similar for it, but I need to know what the rear axle will handle. The guy I bought it from had 456 gears and a mini spool installed in the stock rear-end and was running low 13s with a warmed over 350. The rear end looks small to me,though ( I think about 7 1/2"), and if this will not handle the torque, then I am wondering if there is a bolt-in that will work from another vehicle or if I would need to have one custom narrowed (not cheap, nothing is here in OKC) . Any help would be appreciated.

ls1s10onair · 07-01-2009, 09:45 AM

with an automatic, and good driving, the 7.5 will handle a lot..... otherwise, you can get an 8.5 from a 2nd gen (they aren't too common, but they're out there)... thats 100% bolt on, tho in some cases, the driveshaft needs to be shortened. you can also get a for 8.8, with few mods to fit, but its wider than an s10 rear

Formulakid1 · 07-01-2009, 10:26 AM

I went 10.50's on my 7.5" rear, but now I have a 9".

Paint Guy · 07-01-2009, 10:29 AM

So you think the 7.5 will handle running 11.70 1/4 mile times with 10"X 28" slicks?

Paint Guy · 07-01-2009, 10:31 AM

Quote: Originally Posted by Formulakid1

I went 10.50's on my 7.5" rear, but now I have a 9".

Why did you go with the 9" if the 7.5 was handling it? Just for safety reasons? Should I invest in a set of Strange or Moser axles for the 7.5 , or should I just wait until I can get something bigger?

dre0227 · 07-01-2009, 01:00 PM

Its about the 8.8 explorer rearend. The best bang for your buck.
http://v8s10.org/forum/viewtopic.php?f=19&t=10989

Paint Guy · 07-02-2009, 01:13 AM

Quote: Originally Posted by dre0227

Its about the 8.8 explorer rearend. The best bang for your buck.
http://v8s10.org/forum/viewtopic.php?f=19&t=10989

Why wouldn't an 8.8 out of a Mustang work? Has anyone tried it?

Formulakid1 · 07-02-2009, 01:16 AM

Quote: Originally Posted by Paint Guy

Why wouldn't an 8.8 out of a Mustang work? Has anyone tried it?

Because the Mustang rear is not set up for leaf springs and the Exploder rear is almost a bolt in.

Formulakid1 · 07-02-2009, 01:22 AM

Quote: Originally Posted by Paint Guy

Why did you go with the 9" if the 7.5 was handling it? Just for safety reasons? Should I invest in a set of Strange or Moser axles for the 7.5 , or should I just wait until I can get something bigger?

I made well over 200 runs in the mid 11's on the stocker(stock axels with a Zexel unit from a Camaro)

But you let the motor have one hiccup on the starting line with nitrous and BAMMMM!!!!....it's time for an upgrade

The runs before the carnage were 10.50's with 1.4?'s(maybe 1.5?'s....don't remember) 60' times.

Either way.....if it's a NA application with an auto, the 7.5 will live almost forever.

C-Bo · 07-02-2009, 02:02 AM

I've been told the issue with our stock rearend isn't the axles, it's the pinion that can't handle the shock.. I am not sure on this so any one can chime in on that with experience.. hopefully it will help both of our concerns!

Formulakid1 · 07-02-2009, 02:35 AM

Quote: Originally Posted by C-Bo

I've been told the issue with our stock rearend isn't the axles, it's the pinion that can't handle the shock.. I am not sure on this so any one can chime in on that with experience.. hopefully it will help both of our concerns!

See post 9.

If you have a stick and some sticky tires....the 7.5 will die a gruesome death.
The ring gear and pinion will impersonate a hand grenade.

If you have an auto(no trans brakes....treat as manual) and you preload the suspension at the line....it will live a very long time.

It'll even live on the spray......until it stumbles off of the line....unloads the suspension...and then comes back to life before you can even think to lift, thus ripping the front tires away from the clutches of gravity.

BTW, this stunt resulted in the death of my 7.5 and 700R4 instantaneously.

Formulakid1 · 07-02-2009, 02:36 AM

BTW, preloading the suspension will greatly reduce the amount of shock to the ring gear and pinion, and rear tires...thus(in my experience)making it easier to hook.

C-Bo · 07-02-2009, 02:41 AM

will a ladder bar setup hurt or help with the shock?

Paint Guy · 07-02-2009, 09:22 AM

Mine is set up with slide-a-lock traction bars. I do not intend at this point to use nitrous for bracket racing (just another thing to worry about). Hopefully this rear end will hold up long enough to enjoy it before back-halfing, probably after next season.

Formulakid1 · 07-03-2009, 02:10 AM

Quote: Originally Posted by C-Bo

will a ladder bar setup hurt or help with the shock?

I don't think that would change.

wolf36520 · 07-07-2009, 12:42 AM

Quote: Originally Posted by Paint Guy

So you think the 7.5 will handle running 11.70 1/4 mile times with 10"X 28" slicks?

mine runs 11.60s in the 1/4 pushing 450 hp with the stock 7.5 i beefed it up with a set of mosser axles,3.73 richmond gear and a minni spool running m/t e/t drags 15 26 10 and have never had a problem with it not being able to handle the power

firstgenon24s · 07-10-2009, 04:31 PM

Hey Fix Yo Door! lol jk

07-01-2009, 09:33 AM	#1
Paint Guy Registered User Join Date: Jun 2009 Posts: 28 Location: OKC User is: OffLine	Rear axle questions Hi all, Hoping for expert help here. I am putting about 450 to 500 hp into my s10 extended cab for drag racing. I know I will buy a Street Fighter T-350 transmission or similar for it, but I need to know what the rear axle will handle. The guy I bought it from had 456 gears and a mini spool installed in the stock rear-end and was running low 13s with a warmed over 350. The rear end looks small to me,though ( I think about 7 1/2"), and if this will not handle the torque, then I am wondering if there is a bolt-in that will work from another vehicle or if I would need to have one custom narrowed (not cheap, nothing is here in OKC) . Any help would be appreciated.
	[Reply w/Quote]

07-01-2009, 09:45 AM	#2
ls1s10onair Local Tech Age: 26 Join Date: Jan 2008 Posts: 3,175 Location: westwood, nj User is: OffLine	Re: Rear axle questions with an automatic, and good driving, the 7.5 will handle a lot..... otherwise, you can get an 8.5 from a 2nd gen (they aren't too common, but they're out there)... thats 100% bolt on, tho in some cases, the driveshaft needs to be shortened. you can also get a for 8.8, with few mods to fit, but its wider than an s10 rear
	[Reply w/Quote]

07-01-2009, 10:26 AM	#3
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions I went 10.50's on my 7.5" rear, but now I have a 9".
	[Reply w/Quote]

07-01-2009, 10:29 AM	#4
Paint Guy Registered User Join Date: Jun 2009 Posts: 28 Location: OKC User is: OffLine	Re: Rear axle questions So you think the 7.5 will handle running 11.70 1/4 mile times with 10"X 28" slicks?
	[Reply w/Quote]

07-01-2009, 10:31 AM	#5
Paint Guy Registered User Join Date: Jun 2009 Posts: 28 Location: OKC User is: OffLine	Re: Rear axle questions Quote: Originally Posted by Formulakid1 I went 10.50's on my 7.5" rear, but now I have a 9". Why did you go with the 9" if the 7.5 was handling it? Just for safety reasons? Should I invest in a set of Strange or Moser axles for the 7.5 , or should I just wait until I can get something bigger?
	[Reply w/Quote]

07-01-2009, 01:00 PM	#6
dre0227 It is what it is bitch... Join Date: May 2007 Posts: 1,915 Location: MN User is: OffLine	Re: Rear axle questions Its about the 8.8 explorer rearend. The best bang for your buck. http://v8s10.org/forum/viewtopic.php?f=19&t=10989
	[Reply w/Quote]

07-02-2009, 01:13 AM	#7
Paint Guy Registered User Join Date: Jun 2009 Posts: 28 Location: OKC User is: OffLine	Re: Rear axle questions Quote: Originally Posted by dre0227 Its about the 8.8 explorer rearend. The best bang for your buck. http://v8s10.org/forum/viewtopic.php?f=19&t=10989 Why wouldn't an 8.8 out of a Mustang work? Has anyone tried it?
	[Reply w/Quote]

07-02-2009, 01:16 AM	#8
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions Quote: Originally Posted by Paint Guy Why wouldn't an 8.8 out of a Mustang work? Has anyone tried it? Because the Mustang rear is not set up for leaf springs and the Exploder rear is almost a bolt in.
	[Reply w/Quote]

07-02-2009, 01:22 AM	#9
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions Quote: Originally Posted by Paint Guy Why did you go with the 9" if the 7.5 was handling it? Just for safety reasons? Should I invest in a set of Strange or Moser axles for the 7.5 , or should I just wait until I can get something bigger? I made well over 200 runs in the mid 11's on the stocker(stock axels with a Zexel unit from a Camaro) But you let the motor have one hiccup on the starting line with nitrous and BAMMMM!!!!....it's time for an upgrade The runs before the carnage were 10.50's with 1.4?'s(maybe 1.5?'s....don't remember) 60' times. Either way.....if it's a NA application with an auto, the 7.5 will live almost forever.
	[Reply w/Quote]

07-02-2009, 02:02 AM	#10
C-Bo RecklessPerformance Age: 22 Join Date: Jun 2009 Posts: 178 Location: The Fort, Ar User is: OffLine	Re: Rear axle questions I've been told the issue with our stock rearend isn't the axles, it's the pinion that can't handle the shock.. I am not sure on this so any one can chime in on that with experience.. hopefully it will help both of our concerns!
	[Reply w/Quote]

07-02-2009, 02:35 AM	#11
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions Quote: Originally Posted by C-Bo I've been told the issue with our stock rearend isn't the axles, it's the pinion that can't handle the shock.. I am not sure on this so any one can chime in on that with experience.. hopefully it will help both of our concerns! See post 9. If you have a stick and some sticky tires....the 7.5 will die a gruesome death. The ring gear and pinion will impersonate a hand grenade. If you have an auto(no trans brakes....treat as manual) and you preload the suspension at the line....it will live a very long time. It'll even live on the spray......until it stumbles off of the line....unloads the suspension...and then comes back to life before you can even think to lift, thus ripping the front tires away from the clutches of gravity. BTW, this stunt resulted in the death of my 7.5 and 700R4 instantaneously.
	[Reply w/Quote]

07-02-2009, 02:36 AM	#12
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions BTW, preloading the suspension will greatly reduce the amount of shock to the ring gear and pinion, and rear tires...thus(in my experience)making it easier to hook.
	[Reply w/Quote]

07-02-2009, 02:41 AM	#13
C-Bo RecklessPerformance Age: 22 Join Date: Jun 2009 Posts: 178 Location: The Fort, Ar User is: OffLine	Re: Rear axle questions will a ladder bar setup hurt or help with the shock?
	[Reply w/Quote]

07-02-2009, 09:22 AM	#14
Paint Guy Registered User Join Date: Jun 2009 Posts: 28 Location: OKC User is: OffLine	Re: Rear axle questions Mine is set up with slide-a-lock traction bars. I do not intend at this point to use nitrous for bracket racing (just another thing to worry about). Hopefully this rear end will hold up long enough to enjoy it before back-halfing, probably after next season.
	[Reply w/Quote]

07-03-2009, 02:10 AM	#15
Formulakid1 10 sec. street truck!!! Age: 33 Join Date: Jul 2002 Posts: 1,437 Location: Mississippi User is: OffLine	Re: Rear axle questions Quote: Originally Posted by C-Bo will a ladder bar setup hurt or help with the shock? I don't think that would change.
	[Reply w/Quote]

07-07-2009, 12:42 AM	#16
wolf36520 s10 junky Age: 31 Join Date: Sep 2008 Posts: 29 Location: tucson, az User is: OffLine	Re: Rear axle questions Quote: Originally Posted by Paint Guy So you think the 7.5 will handle running 11.70 1/4 mile times with 10"X 28" slicks? mine runs 11.60s in the 1/4 pushing 450 hp with the stock 7.5 i beefed it up with a set of mosser axles,3.73 richmond gear and a minni spool running m/t e/t drags 15 26 10 and have never had a problem with it not being able to handle the power
	[Reply w/Quote]

07-10-2009, 04:31 PM	#17
firstgenon24s Registered User Age: 21 Join Date: Nov 2007 Posts: 1,635 Location: User is: OffLine	Re: Rear axle questions Hey Fix Yo Door! lol jk
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