Looking for some recommendations on a rear end. On the fence on a 9in or S60. Spool

[Camaro96]

Running 385 Ltx block with sold roller with 650 in of lift, ported polished AFR 227 with lt-4 intake ported to match, mono blade TB, D1SC with 3.4 pulley, 12 rib. Intercooled, bult 4L60E w brake. Looking to run 28 10.5 drag radial tire. Just want to get the built rear to handle abuse.

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[popo8]

I had a 385 with 227 eliminator afrs and a p1sc doing about 10 lbs of boost thru a built 6spd.

Loved my 9"... 35sline axels with locker.

Locker is a bit annoying with a stick, but "racecar stuff..."

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[Brandon++S]

Stock 10 bolt can't handle that??....lol

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[Camaro96]

Stock 10 bolt can't handle that??....lol

Sent from my SM-G930V using TapatalkYa I wish. It won't handle the mild built 383 on stick tire

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[1QUICKZ28]

Strange S60 here. 4:10’s, 35 spline axles and the true trac spiral gear locker, Strange Ultimate cover, and running ET Pro Drag Radials. Takes one hell of a beating. Like Popo8 mentioned, locker in a stick can be annoying at times. Why? Because race car. LOL. Here’s how I would rate the rears offered for our cars. This is just my opinion. Don’t forget a good yoke, u-joint and a good drive shaft.

1. Nine inch.
2. Strange S60
3. 12 Bolt / 8.8


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[shownomercy]

The more important question is how fast you want to spin the motor, and how fast you plan on trapping.

S60 is limited to 3.54s whereas a 9 inch can basically have whatever you want in it. I semi regret going S60 in that light.

[gunters96lt1]

I have a Trick Chassis 9"....still have to get it in the car, but its stout!

[shadowbandit]

i have a strange s60 i love it but some days i wish i had a 9" so i can have to centers that i can swap out for what ever im doing that day

[Cathead]

I have a S60 and no regrets. I wasn't ready to go 9 inch four letter f-word.

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[Mystery Bird]

I just received my S60 for my Camaro with 4:10 gears, 35 spline axles, 1/2" studs and so on. Very nice quality and price for what you get. You just missed the 10% off and free shipping sale.

I have a Moser 12 bolt in my Firebird. It is nice heavy duty with 3:90 gears but they starting to whine just a bit, I drag race it and street beat it for about 6-7 years now, that is why I went with an S60 this time for the Camaro, plus the sale and free shipping.

[Mystery Bird]

The more important question is how fast you want to spin the motor, and how fast you plan on trapping.

S60 is limited to 3.54s whereas a 9 inch can basically have whatever you want in it. I semi regret going S60 in that light.

I don't understand why you're limited to 3:45's?

[shownomercy]

I don't understand why you're limited to 3:45's?

A S60 can only go down to 3.54 gear set. In my car, 373s limit me to 140 trap with current redline.

A turbo car could go even lower and negate the need to have OD trans.

[Mystery Bird]

A S60 can only go down to 3.54 gear set. In my car, 373s limit me to 140 trap with current redline.

A turbo car could go even lower and negate the need to have OD trans.

Ahhh, lowest, I was thinking highest.

[Camaro96]

The more important question is how fast you want to spin the motor, and how fast you plan on trapping.

S60 is limited to 3.54s whereas a 9 inch can basically have whatever you want in it. I semi regret going S60 in that light.Plan on spinning motor 6500- 7000 the limit to stock PCM.

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[Camaro96]

I just received my S60 for my Camaro with 4:10 gears, 35 spline axles, 1/2" studs and so on. Very nice quality and price for what you get. You just missed the 10% off and free shipping sale.

I have a Moser 12 bolt in my Firebird. It is nice heavy duty with 3:90 gears but they starting to whine just a bit, I drag race it and street beat it for about 6-7 years now, that is why I went with an S60 this time for the Camaro, plus the sale and free shipping.The limit to the 12 bolt is limited ability to take abuse. The S60 is it's inability to go beyond 3.54 gears limited trap speed to 140. 9in has a wide gamit of gear selection and strength.

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[Injuneer]

S60 carries a 25# weight penalty over the 12-bolt, but has lower (5%) power losses than the 12-bolt (7%). 9-inch pushes the power loss to 10%. Doesn't the S60 require a shorter driveshaft?

My 12-bolt received very limited wear and tear. But when the car still had the T56 and a McLeod Street Twin, and I was doing 5,000+ RPM dumps on sticky tires, there always seemed to be a subtle change in the sound of the gears after a day at the track. I would say limit the 12-bolt to 750 HP behind a standard trans. With the TH400 it seems much more tolerant of abuse.

As far as swapping center sections with the 9-inch, the torque arm mount, at least with Moser's design, complicates things, particularly if you are try to do the swap in a rush at the track.

[Camaro96]

S60 carries a 25# weight penalty over the 12-bolt, but has lower (5%) power losses than the 12-bolt (7%). 9-inch pushes the power loss to 10%. Doesn't the S60 require a shorter driveshaft?

My 12-bolt received very limited wear and tear. But when the car still had the T56 and a McLeod Street Twin, and I was doing 5,000+ RPM dumps on sticky tires, there always seemed to be a subtle change in the sound of the gears after a day at the track. I would say limit the 12-bolt to 750 HP behind a standard trans. With the TH400 it seems much more tolerant of abuse.

As far as swapping center sections with the 9-inch, the torque arm mount, at least with Moser's design, complicates things, particularly if you are try to do the swap in a rush at the track.Thank you for your insight and opinion as always you bring light to the situation.

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[Stormyweather]

Can't you just use a shorter tire with the S60 to help with the ratio issue?

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[Injuneer]

Taller tire.... with a 140 MPH trap speed/red line limit, going from a 26" --> 28" tire would add about 10 MPH. Or 28" --> 30", but that requires fender mods.

[Sahara54]

Quick Performance 9", Moser 31 Spline axles, Strange S Case, 4.11's w/ factory tracklok.

[Camaro96]

Quick Performance 9", Moser 31 Spline axles, Strange S Case, 4.11's w/ factory tracklok. Sahara54 you like yours? I have a couple questions. What's your trap speed with the 411s? What's the advantage of tracklok over a spool?

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[Stormyweather]

I found a calculator that said 140 but I can't find the web address history on my tab

It's not how fast you mow. It's how you mow fast.

[Sahara54]

Sahara54 you like yours? I have a couple questions. What's your trap speed with the 411s? What's the advantage of tracklok over a spool?

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Have no clue on trap speed. It's never been to the track with the rear under it. The 4.11 made the car sooooo much more enjoyable to drive on the street. Overall I love it, I will say you will need to massage the tunnel where the torque arm is and when i bolted my OEM 2K C5's to the back they were slammed into the rear tubs, I'm running a 1" hubcentric spacer to flush the wheels.

Tracklok is the factory Ford LSD, nice and quiet on sharp turns but still locks up like a champ when I need it too.

[Stormyweather]

Found it! Summit has a https://www.summitracing.com/popup/calcsandtools/gear-ratio-calculator

It's not how fast you mow. It's how you mow fast.

[agenthol302]

not sure how I missed this party but im +1 on 9in

however injuneer brings up a great point that the whole easy center section swap can be a pain in the ass if your not set up for it!

personally id rock the shit outta the 10 bolt till she blows. we do have a friend up here who ran low 9s on his 10 bolt for a year and couldn't blow it up. he had the fab 9in sitting in his garage waiting but never was able to grenade it.