how much drop before a cnotch? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

of13swc · 11-04-2014, 03:24 PM

How far can I drop my rear end before I need a cnotch? I want to drop 5" but do not want to notch it.

**Clyde65** · 11-04-2014, 03:50 PM

kinda depends on your tire size, leaf or coil and fleet or step.

rule of thumb is 4-5".

Mikes66ChevyC10 · 11-04-2014, 08:42 PM

Quote:

Originally Posted by Clyde65

kinda depends on your tire size, leaf or coil and fleet or step.

rule of thumb is 4-5".

Forgive me if this is a stupid question but why does it matter if it's a fleet or step? Can one be lowered more than the other? Just curious because I have a step with coils.

duallyjams · 11-04-2014, 09:26 PM

5" rear empty no problem but I use as a truck had to add c-notch, axle was hitting the frame.

donthekawguy · 11-04-2014, 07:24 PM

I have 4 inch springs and have no problem.

LVPhotos · 11-04-2014, 09:58 PM

Go bags and you can adjust. My 62 went at least 5" without issues. Put the springs in look for issues then decide.

**Clyde65** · 11-05-2014, 09:05 AM

It doesnt really, was just asking for a mental picture along with what tire size you are running.

Nacho_Paras N.L. · 11-06-2014, 12:30 PM

I have a 66" stepside on cpp 4" drop springs and 2" lowering blocks with no c-notch. Does not bottom out. Fuel cell is located in the rear. I never have any load in it, but I'm pretty sure if I were to put load in it, rearend will bump the bump stop.

4mulaSvaliant · 11-06-2014, 12:50 PM

I just did 5" rear drop (Coil springs) and dont see that Ill need a C. Though I plan to USE... my truck, so I may find a heavier load may warrant a c-notch eventually.

I dont happen to have a picture of the room between the bump stops and axle now, but it was a good 3-4" still. I figured with no heavy load and not hauling stuff in the back on a daily basis that it will be enough for the occasional pothole travel needed.

of13swc · 11-07-2014, 08:14 PM

Thank you for all the replies. I have decided to go ahead and put one in. Just in case later I want to lower it more. thank you all again.

11-04-2014, 03:24 PM	#1
of13swc Registered User Join Date: Sep 2011 Location: Ocean Springs, ms Posts: 204	how much drop before a cnotch? How far can I drop my rear end before I need a cnotch? I want to drop 5" but do not want to notch it.

11-04-2014, 03:50 PM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: how much drop before a cnotch? kinda depends on your tire size, leaf or coil and fleet or step. rule of thumb is 4-5". __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

11-04-2014, 09:26 PM	#4
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: how much drop before a cnotch? 5" rear empty no problem but I use as a truck had to add c-notch, axle was hitting the frame. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

11-04-2014, 07:24 PM	#5
donthekawguy Registered User Join Date: Aug 2012 Location: Rathdrum ID Posts: 1,129	Re: how much drop before a cnotch? I have 4 inch springs and have no problem. __________________ 66 shorty

11-04-2014, 09:58 PM	#6
LVPhotos Registered User Join Date: Jan 2013 Location: Las Vegas, NV Posts: 1,857	Re: how much drop before a cnotch? Go bags and you can adjust. My 62 went at least 5" without issues. Put the springs in look for issues then decide. __________________ 1962 shortbed 408cui small block, TKO 600 5-speed, bagged Porterbuilt suspension. 18" Salt Flats http://www.cardomain.com/ride/332579...t-c-k-pick-up/ http://67-72chevytrucks.com/vboard/s...d.php?t=560081

11-05-2014, 09:05 AM	#7
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: how much drop before a cnotch? It doesnt really, was just asking for a mental picture along with what tire size you are running. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

11-06-2014, 12:30 PM	#8
Nacho_Paras N.L. Registered User Join Date: Oct 2014 Location: Houston, TX Posts: 45	Re: how much drop before a cnotch? I have a 66" stepside on cpp 4" drop springs and 2" lowering blocks with no c-notch. Does not bottom out. Fuel cell is located in the rear. I never have any load in it, but I'm pretty sure if I were to put load in it, rearend will bump the bump stop.

11-06-2014, 12:50 PM	#9
4mulaSvaliant Registered User Join Date: Oct 2014 Location: VIRGINIA BEACH Posts: 140	Re: how much drop before a cnotch? I just did 5" rear drop (Coil springs) and dont see that Ill need a C. Though I plan to USE... my truck, so I may find a heavier load may warrant a c-notch eventually. I dont happen to have a picture of the room between the bump stops and axle now, but it was a good 3-4" still. I figured with no heavy load and not hauling stuff in the back on a daily basis that it will be enough for the occasional pothole travel needed.

11-07-2014, 08:14 PM	#10
of13swc Registered User Join Date: Sep 2011 Location: Ocean Springs, ms Posts: 204	Re: how much drop before a cnotch? Thank you for all the replies. I have decided to go ahead and put one in. Just in case later I want to lower it more. thank you all again.



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