#1
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rear end brace?
ok i was talking to a friend about my noise my rear has been making since day one. After talking to him he told me it sounds like my brace needed to be adjusted to hold the pinion angle better. I said what brace and so he sent me a picture
i said i have those in a box of parts but i have no idea where it goes. He told me he is not sure but it helps hold the rear in place so the pinion doesn't get out of wack. any truth to that? and where does it go on my 69 chevelle?
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2005 dodge magnum daily driver 1988 mazda rx7 LS6 swap 1969 SS work in progress |
#2
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They go from the lower control arm to the chassis. It's a brace meant to help stiffen the mounting point and reduce flex. I believe it was first introduced on 66' SS 396 cars.
Strangely enough... my 72' which was a factory 350 2bbl/TH350, has them. My 69' factory 300 HP 350 4 speed car does not have them. (I intended to add them) Here are some pictures... http://www.66ss396.com/rearend/
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#3
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They won't help the pinion angle. If you are getting noise most likely something in the rearend.
Here's where they go.
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Ray 1970 SS Chevelle Van Nuys Built |
#4
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thanks for the info. I guess when i take my rear off to take it to the shop to be over hauled i will add it then
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2005 dodge magnum daily driver 1988 mazda rx7 LS6 swap 1969 SS work in progress |
#5
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I'm betting the '72 is an ATL built factory A/C car. I have yet to see an ATL Chevelle with A/C that didn't have the braces...regardless of drive train.
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2017 Camaro RS -217 cu in 365 HP w/8 speed auto 1967 Camaro SS -5.3L LS w/4L60E & 4.11 12 bolt 2019 Cadillac XT5 3.6L V6 w/310 HP & 8 speed AWD |
#6
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Baltimore built, didn't have AC, I added it. Had power drum brakes and manual steering.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi |
#7
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I agree with Ray, just put a good set of Monroe shocks on it. Shocks with springs are good for towing package. If you put those on for normal driving it will be a stiff ride.
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huawei honor |
#8
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I put a new set of those on my 71 Malibu now that it has a 396 in it. I read where they were put in the cars to help stiffen up the rear crossmember because the cars with bigger horsepower motors in them were breaking the welds on that crossmember.
Last edited by hkalin; 05-21-2015 at 03:45 PM. |
#9
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That's my understanding of why they were added. The upper arms pull on the cross member during acceleration causing it to flex and possibly break welds. Putting them on won't chance the pinion angle put will help it from changing during acceleration. Adjustable upper arms or changing rear ride height are the way to change pinion angle.
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#10
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Like I mentioned...from my personal experience...including 4dr models.
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2017 Camaro RS -217 cu in 365 HP w/8 speed auto 1967 Camaro SS -5.3L LS w/4L60E & 4.11 12 bolt 2019 Cadillac XT5 3.6L V6 w/310 HP & 8 speed AWD |
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