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09-25-2006, 07:16 PM | #1 |
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Join Date: Aug 2006
Location: Portland
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does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I have a 72 1/2ton SWB, I'm planning to drop 3.5" x 5". I find mixed results in the boards about notching the frame and adding a drop crossmember. Anybody with the same ride having problems?
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09-25-2006, 08:24 PM | #2 |
sufficiently talented fool
Join Date: Jun 2006
Location: Forest Hill, MD
Posts: 2,231
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I just put 3" front and 5" rear springs in my 72. No other mods were done and the only issues I am having is the exhaust is hitting the panhard bar mount on the right side, I am going to put an adjustable panhard bar on so hopefully a shorter bar will help that. The axle is now off center by about 1/2 inch so other than the exhaust clearance, a shorter bar isn't needed, but it will correct that also. On the front I just need to shorten or remove the front lower bump stops. It rides OK, but if I fix these two things it would be better.
Bob
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09-25-2006, 10:07 PM | #3 |
BlahBlahBlah
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
Ive read on this board you can do a 4/6 drop, but if you use your truck to haul stuff around you will hit without a notch. Not true with burbs or panels because they are heavier in the rear.
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09-25-2006, 10:28 PM | #4 |
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Location: Los Angeles, Ca
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I have a 4/6 on mine that is all spring (no drop spindles). I don't have a C-notch and it works ok. I just don't have much travel in the front or back. Bottoms out very easily. I also have a 2 piece driveline. From the looks of my truck you would need a drop center cross member if you wanted to run a 1 piece. Also my driveline angles are not what they should be because of the 6 inch drop in the rear.
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1968 Chev SWB Fleet with GMC Clip and lots of 71-72 parts! |
09-27-2006, 12:31 AM | #5 | |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
Quote:
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09-27-2006, 09:23 AM | #6 |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
PO put the coils on it so unfortunately I am not sure where they came from. I would like to replace the front setup with 1" drop coils and drop spindles from Early Classic.
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1968 Chev SWB Fleet with GMC Clip and lots of 71-72 parts! |
09-26-2006, 01:25 AM | #7 |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
Thanks for the input. I'm really trying to save over $300 in parts i may not need and the labor of putting them in. I think I'll use that money towards front and rear swaybars and go without the drop center and c.
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09-26-2006, 11:10 AM | #8 |
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Location: willis tx
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I have a 3/5 drop on mine no problems with it no c-notch either
Last edited by case_bt; 09-26-2006 at 11:10 AM. Reason: typing with broke hand lol |
09-26-2006, 11:11 AM | #9 |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
here it is
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09-27-2006, 10:33 AM | #10 |
YA YA
Join Date: Aug 2004
Location: Rockledge, Fl
Posts: 1,273
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I have a question. I just installed the 3" front drop springs, if i lift the front end off the ground by the front cross member the springs are way loose and fall outta place. Is this normal? Thanks, Jim.
btw - do you happen to have a side profile photo of you truck? Looks sharp!
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Jimbo '72 SWB - 350 (frame-off resto in progress - donations accepted) '04 Chevy Avalanche '03 Cadillac CTS (wife's ride) Restoration progress - http://67-72chevytrucks.com/vboard/s...d.php?t=335707 |
09-27-2006, 01:48 PM | #11 |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
the springs getting loose doesn't seem right make sure they are seated properly
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09-27-2006, 02:22 PM | #12 |
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Location: Temecula, Ca.
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
I have a 3/4 drop on my 67 sb stepside (but would love to get a little lower) and my springs are loose or fall out of place when i jack up my front end also. The ride is fairly smooth but sometimes I forget to put the springs back in their indents. So, this is not normal?
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09-26-2006, 06:13 PM | #13 |
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Location: Portland
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
that is the exact stance i am going for. looks great.
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09-26-2006, 09:46 PM | #14 |
sufficiently talented fool
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Location: Forest Hill, MD
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
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"it's impossible to be surrounded by idiots when you are part of the circle" 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board Last edited by centsless; 10-04-2007 at 08:52 PM. |
09-27-2006, 01:32 AM | #15 | |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
Quote:
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09-27-2006, 05:44 PM | #16 |
sufficiently talented fool
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Location: Forest Hill, MD
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
Drop was done with springs only. 3" front, 5" rear. Front tires are 255/50zr17, rear tires are 255/60vr17. The color is 2006 chevrolet impala laser blue.Mine also loses the front springs when you jack it up by the crossmember. I thought it was because it is missing the rubber bump stops on the upper control arm.
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"it's impossible to be surrounded by idiots when you are part of the circle" 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board |
09-27-2006, 05:47 PM | #17 |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
took me 1.5 hours
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09-27-2006, 10:28 AM | #18 |
Like a Rock!
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Location: USA
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
[QUOTE=centsless;1814037]Nice truck case_bt !! Here is mine with 3/5 drop and 17" Impala SS wheels.
Beautiful truck but that looks more like a 2/4 drop with all that space above the tires.
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09-27-2006, 06:25 PM | #19 | |
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Re: does a 3.5 x 5 drop need a c-notch and drop center crossmember?
[QUOTE=c10crazy;1814394]
Quote:
You should have seen all the clearance before we swapped springs!!!
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The place where you made your stand never mattered. Only that you were there... and still on your feet.
Stephen King Last edited by redneckgirl; 09-27-2006 at 06:27 PM. |
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