Rear End Purchase! - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

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post #1 of 34 (permalink) Old Nov 17th, 19, 9:18 AM Thread Starter
Eric
 
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Rear End Purchase!

Looking for thoughts/opinions on replacing my 10 Bolt in my 72 Chevelle. What manufacture do you like? 12 bolt or 9"? As of right now I have a 350 and 4 speed. I will be adding a Big Block of LS one day.

Added some pics of the car as it sits...

I've looked at the Currie, Moser and Strange set ups but have no experience with any certain brand. Thanks
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post #2 of 34 (permalink) Old Nov 17th, 19, 9:25 AM
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Bill
 
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Re: Rear End Purchase!

That is a sharp ride. Those are all good choices. Unless you are going to put slicks on it at the drag strip, I would just stay with a stock 12 bolt Chevy.

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post #3 of 34 (permalink) Old Nov 17th, 19, 9:33 AM
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Marcus
 
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Re: Rear End Purchase!

Nice car!

Personally if I was looking for a new rearend I would go with a moser 12 bolt or if you can stand the look a quick time performance 9” rearend.

Or if you can live with a used rebuilt 12 bolt contact member lionel-n-chevelles he rebuilds and sell 12 bolts.
https://www.chevelles.com/forums/mem...chevelles.html
Or tom TRRC
https://www.chevelles.com/forums/mem...4775-trrc.html
Or Jim monzaz
https://www.chevelles.com/forums/mem...06-monzaz.html
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Chevelle Malibu ss 64
489 BB with parts from Lewis racing
Alumitech radiator with dual spals
Th 400 Edge 9.5" converter
57 3/4” wide 12 bolt: Eaton posi, Us gear 3.31, Toms KA 33 splines axles
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post #4 of 34 (permalink) Old Nov 17th, 19, 10:29 AM
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Re: Rear End Purchase!

What do you plan to do with your vehicle? 12. Lots are pretty stout unless you are pushing a lot of torque and you get your tires to plant.

I’m jonesing for a Strange S60, which is Strange’s version of the Dana 60. I put a bit of cash and work I to my 12 bolt, axels, new Eaton Tru Trac, C5 disc brakes, but I fear my 12bolt will be working overtime trying to keep up with the rest of my drive train.

Joe
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post #5 of 34 (permalink) Old Nov 17th, 19, 10:58 AM
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Re: Rear End Purchase!

I bought and installed the Strange Engineering "S-60" Dana 60 rear set-up for GM A-body cars in my Chevelle. But that's for an 800 HP car. So I wanted to have the 9.75" diameter ring gear and beefier pinion that the Dana 60 uses. But you wouldn't need a Dana 60 unless you're shooting for 700+ HP under the hood. Two cool things about the Strange S-60 rear is that it comes standard package with 35 spline axles, and it also comes with the carrier spanner nuts just like 9" rears have to adjust the back lash, and to install and remove the carrier without any wrestling match nor case spreader tool to wedge shim packs in there. Simply use a spanner wrench on the spanner nuts.

The 12 bolt Moser rears look nice, but it would be nice for easier ring and pinion gear swaps if you had a 9" rear since they have the third member which allows you to remove it from the pumpkin and set it on your workbench to perform the gear swap. It's all about pros and cons and trade-offs, and it depends what you plan to do with this car as far as power level goes. I'm guessing with those wheels and tires you have, you won't be taking it to the drag strip very often, if at all.

Keep in mind that with Dana 60 rears, and most , if not all 9" rears, they employ a 1350 series pinion yoke, which will require you to purchase a 1350 series transmission slip yoke, and 1350 U-joints along with a driveshaft with the 1350 yokes. As far as I know, even the aftermarket 12 bolt rears give you a choice to remain with the stock 1310 U-joints, or upgrade to the bigger 1350
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post #6 of 34 (permalink) Old Nov 17th, 19, 11:54 AM
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Greg.
 
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Re: Rear End Purchase!

After having a Shop Rebuild the Posi in the 50 yr old 12 Bolt in my 67
and then it end up going back to the Posi not working a year later
I went this route
STRANGE S60 GM A Body Bolt In
Fully Welded 360*Tubes / Mounts Installed & Raised 67 Spring Perches / Housing Ends H 1135 or H1137
/ 1350 PinionYoke / S/T Series 35 Spline Axles / ½” Studs / Axle Bearings /
/ Standard Gear Set / U 1600 Steel Pinion Yoke(1350) / ChromeCover / BreatherVent / FillerPlug / DrainPlug / LucusOil /
Gearing Ratio 3.70
T/A aluminum cover that has the bolts to keep the bearings in place
Truetrac(worm type) # OPRS02
Strange Housing Ends - H1135 Big Ford Early ½” Holes 1.300” Wide
- B1608 11” Drum for H1135 ends

Had it installed in the 67 in Oct/2013 and has been working great on the Street AND at the Track
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67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #7 of 34 (permalink) Old Nov 17th, 19, 12:10 PM
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Re: Rear End Purchase!

Strange makes the best rears.

The Dana 60 is the strongest. It's also the heaviest.

The 9 inch is next strongest.

The 12 bolt is the weakest of the three but built right it's good to about 550 HP with an automatic. Some folks have had good luck at higher power levels. It's also the lightest and most efficient of the three.
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post #8 of 34 (permalink) Old Nov 17th, 19, 12:12 PM
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Eric
 
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Re: Rear End Purchase!

I installed a Moser 12 bolt housing and axles in my 66 Chevelle when the OEM axle tube cracked. The Moser piece is a lot stronger in critical areas versus the OEM housing. Moser gave several options when ordering such as style of yoke and housing ends. I bought mine from a Moser dealer as it was cheaper than purchasing it directly from the company. My decision to go with the 12 bolt was based on the ability to buy a housing and axles from moser and re-use the gears, posi and yoke from the old housing.
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post #9 of 34 (permalink) Old Nov 17th, 19, 2:18 PM
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Steve
 
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Re: Rear End Purchase!

Moser just put up a 10% off sale through Cyber Monday.
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1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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post #10 of 34 (permalink) Old Nov 17th, 19, 4:08 PM
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Greg.
 
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Re: Rear End Purchase!

Before you go buying a 12 Bolt from Moser checkout/read this Thread and the others mentioned in it

https://www.chevelles.com/forums/33-...ems-noisy.html

NOTE Post #s 10 / 12 / 13
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67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #11 of 34 (permalink) Old Nov 17th, 19, 4:44 PM
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Drew
 
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I went with a beefed up 12 bolt with posi.
700hp boosted LS. 6spd on MT streets
And it’s been great.
Dragged it about 25 runs. No concerns.
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post #12 of 34 (permalink) Old Nov 17th, 19, 4:46 PM
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Drew
 
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Here!
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post #13 of 34 (permalink) Old Nov 17th, 19, 5:00 PM
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Steve
 
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Re: Rear End Purchase!

On the other side of that coin - I just purchased a complete 12 bolt Moser MusclePak for my '72 2 months ago with 3.73 gears, 33 spline True Trac and powder coated black. It arrived as ordered except one thing they did mess up - they gave me 1/2-20 studs instead of 7/16-20 studs.

It bolted right in and works perfectly.

Quote:
Originally Posted by Kirk's67SS View Post
Before you go buying a 12 Bolt from Moser checkout/read this Thread and the others mentioned in it

https://www.chevelles.com/forums/33-...ems-noisy.html

NOTE Post #s 10 / 12 / 13
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1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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post #14 of 34 (permalink) Old Nov 17th, 19, 7:27 PM Thread Starter
Eric
 
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Re: Rear End Purchase!

Wow, a lot of good info here. I will defiantly have to re-read these comments again. I don't see me dragging this car, looking to build a "pro touring" style car for the street. I do have a big block my buddy built that is pushing 700+ but I think I'm going to sell it and go with a less HP motor.
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post #15 of 34 (permalink) Old Nov 17th, 19, 9:15 PM
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Steve
 
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Re: Rear End Purchase!

Here's a picture of my Moser 12 bolt installed along with the UMI rear suspension and chassis mounted swaybar.


1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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