If you have an S60 rearend let me know how you like it, what you like about it and what you dislike. I am on the fence between this a 9inch. Leaning more toward the S60.
Thanks

 

I have one with a spool and 4.10s and i used to daily drive it, its damn quiet since it has the street gears in it. I like it alot and it can take some real abuse, I was thinking about getting the 9 inch but dont regret having the s60 now. My s60 is made by strange btw.

 

S60 is a very good rear end, we sell a decent amount of them yearly. No real complaints from most of our customers.

Here is the down falls to them though.
They are a heavy rear end.
You still use a bulky torque arm bracket set up.

 

I have one and love it. the only cons are how loud the gears are in the rear (im sure thats because they are set wrong) and how heavy it is.

 

There like 20/25 lbs heavier then a 9"

 

The chart below is from GM High-Tech magazine. Take a look at how much less horsepower the Moser M9 uses compared to a Strange S60! Bob

TABLE OF REAR-WHEEL HORSEPOWER/TORQUE CHANGES:
Car Rear Old HP/TQ Rear New HP/TQ % Loss
Jensen Camaro Stock 3.42 412.5/390.0 Strange S60 3.73 397.9/376.0 3.5/3.6
Werner Trans Am Stock 3.42 441.2/432.3 Moser M9 3.70 436.6/428.6 1.0/0.9


Link to Moser M9 article in GM High-Tech. http://www.gmhightechperformance.com...nds/index.html

 

Im running the S60 in my M6 car and wish I wouldve gone with a 9in. Just my .02. My main thing is how heavy it is and how much power it eats up. But on the plus side if you have one they are pretty much bullet proof.

 

I have a 9inch and I love it. Just install and break in the gears correctly in whichever one you decide to go with. Good luck

 

Yeah it eats up power but I love the fact that its near bulletproof and doesnt have much gear noise. My buddy let me put my car on his mustang dyno after I installed the rear without changing anything, the numbers before with a stock 10 bolt were 426whp and 371tq. After I installed the s60 rear with the 4.10s and steel spool it made 407whp and 376tq, both runs made through the muffler.

 

I've got an S60 in my car and I have no complaints. It's pretty much the cheapest/strongest option available to us. I think there are cheaper options out there if you don't mind going with a spool, but I wanted a posi unit.

Obviously it's the heaviest, and it eats more power, but I think people have failed to mention how in most cases the car with the S60 traps a higher speed than it did with the 10bolt, even with the loss in power.

If the loss in power concerns you then clearly you don't need an S60. If you've got an M6 car and love to do high RPM clutch dumps with sticky tires and lots of torque then it's hard not to consider the S60. Look at what you're getting: 35 spline axles and a 9.75" ring gear. It's heavy because it's all freakin huge! Look where all that weight is too, right over the back tires. You don't have to spend more money to make it stronger either: No back braces, and no bearing support diff covers needed.

I spent the extra change and got a chromemoly yolk, which I guess is money spent on making it stronger... but it was a cheap upgrade.

Another thing to consider when shopping for a rear is the driveshaft. Yes, most other rears will allow you to reuse the stock shaft. The S60 requires that you get a new one, or shorten yours.

I think the shaft I got from Eric at MWC was made by PST??? Regardless of who made it it's a hell of a lot stronger than the stock steel shaft that came on my 98. In other words, getting an S60 also means beefing up the driveshaft... and the whole out-the-door price was still cheaper than any other option available, even with the new shaft. I'm sure there are a lot of guys out there who spent over $3k on a rear end and still use the stock driveshaft. The S60 is a bang-for-the-buck rear because it forces you to upgrade more than just the rear, and does it cheaper than all others.

Oh, and as for the Truetrac, it's a 35 spline unit... not a typical 28 or 31 spline unit. When I purchased mine I couldn't find a post where a truetrac broke from the user exceeding its power threshold. The only issues were most likely factory defects.

Hope that helps. Call Midwest Chassis for a good deal on S60's.

 

^ Totally agree. Just got done installing mine in the garage, and it wasn't hard as I thought it would be. Everything just bolts on. Good luck on which ever you decide on.

 

i love mine. worth every interest taxed penny. the fit was perfect and the only noise i hear is a slight whine on acceleration between 55-65. i bought mine after fixing/replacing my stock 10 bolt 4 different times. i should've bought it after the first one broke. its a must if you plan on running sticky tires and dumping the clutch.

my .02-- get a 9" for a track car and a s60 if its more of a street car.

 

Ok, so doing the math here looks like the S60 lost about 3.7% power and the M9 lost 1.2%. I don't think my backside could tell the small difference

 

I don't have one complaint about my S60..... Both gear sets are just as quiet as the 10 bolt and the True Trak has held up to 6k clutch dumps on 28'' slicks without skipping a beat.

You will have to trim your tq arm bracket if you run a UMI or BMR but if you follow the directions carefully it will fit and clear everything.

 

My torque arm just kinda made its on dent in the trans tunnel, I didnt know you had to trim them but it doesnt make any clunking sounds anymore

 

its a great street/strip year end. for a lot more money you can get a lighter trick fa9 setup. but most guys don't need that. a s60 with 70 weld on lca brakets will be great most guys, and be 1,200-2,000 dollars less

got my s60 with a truetrac, got a good deal on it a few years ago 2,100 buck. it weighed 196, my 10bolt was 150

last year went to a spool what was 33 pounds lighter then the truetrac, so its about the same as the 10bolt is that setup. -35spline axles are standard,

 

yeah I paid $2100 shipped for mine with the optional cover, steel spool, 1/2 inch studs and $250 for a driveshaft.

 

that and i have seen my car vary by 10 hp on the same dyno on the same day.... track will tell the story IMO. Dyno numbers are always changing especially between days and something as small as 5hp or 15 hp is hard to tell if its a dyno variance or an actual difference.

 

what do u guys mean by trimming ur ta bracket bc i have umi ta and lca and im thinking about getting rear thats a direct bolt in that i can use my already suspension pieces

 

It's just where some people have to trim a spot on the aftermarket torque arm to get it to line up. The UMI has two different holes to use when mounting it to the rear end. I haven't mounted my UMI on yet but suposedly part of the T/A might get in the way when trying to set it all up. Some people don't have that problem, some do. Either way it's not that big of a deal. My stock torque arm bolted up to it fine, and I'm not sure if anyone has ever had an issue with that. If I have to break out the grinder and remove part of the mount to get it in then I'm not going to worry about it.

The S60 is a monster. If you get one then you won't be unhappy. Oh, I think there's another posi unit that no one ever talks about: the Trac-Lok. I don't know anything about it but you could probably knock $300 off the total price if you opted out of the true-trac.