C-Notch question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jcentsr6 · 09-30-2007, 09:28 PM

If I install a C-notch how much lower can I go before rear tires/rear diff hit the bed. I dont want to cut a hole in the rear bed....but I want to go lower in the rear. I have airbags touching the rear bumpstops right now....thinking of installing a c-notch. Is it worth installing with out cutting the bed?? Thanks in advance guys.

FlatBrokeRacing · 09-30-2007, 10:45 PM

A bolt in notch is well worth the money.

Jcentsr6 · 09-30-2007, 10:55 PM

I dont mind cutting the frame for a c-notch...but dont want a big hold in my bed.

PrerunnerRob · 09-30-2007, 11:02 PM

It has to do with the tire overall diamater as to how much you have to cut, so the bigger the diamater, the more that needs to be removed.

**SactoJim** · 09-30-2007, 11:19 PM

How much further can the axle tube go past the bottom of the frame rail (into a "C" notch) before the top of the diff section hits the bottom of the bed floor?

Jcentsr6 · 09-30-2007, 11:57 PM

I have 295/45/20 rear tires.

Slammed67 · 10-01-2007, 12:39 PM

If I recall correctly, if you use the rubber bumpers that are supplied with the notch, the diff won't hit the bed floor. However, if you remove them, you will have clearance issues.

Jcentsr6 · 10-01-2007, 04:06 PM

Quote:

Originally Posted by Slammed67

If I recall correctly, if you use the rubber bumpers that are supplied with the notch, the diff won't hit the bed floor. However, if you remove them, you will have clearance issues.

I was not aware of the bumpers came with a notch kit. Thanks.

see ten · 10-01-2007, 05:42 PM

My truck only has about an inch difference between the distance from the frame to the axle and the diff to the floor. So in reality I could only gain another inch of clearance before hitting the floor by adding a notch. I've seen lot's of 4x4 guys shave the bottom of the diff for more ground clearance. I don't see why it couldn't be done to the top of a diff to give you more clearance for the bed floor.

SCOTI · 10-01-2007, 06:19 PM

The bolt-in style c-notches come w/bumpstops.

If you install the bumpstops, the rear pumpkin won't hit the bedfloor. Install the c-notch w/o the bumpstop....the pumpkin will hit the floor. The bolt-in c-notch has a 3" depth & the urethane bump-stop is 1.5". If your current frame is not cut, you would gain approx 1.5" + the height of the current bump-stop & bracket (I don't have one so I can't get that measurement for you).

Hope this helps..... Scot.

*Shane* · 10-01-2007, 07:35 PM

My ECE bumpstop is only about 1/2" - 3/4" thick ... small saucer shaped stop.

SCOTI · 10-01-2007, 07:43 PM

Quote:

Originally Posted by Shane

My ECE bumpstop is only about 1/2" - 3/4" thick ... small saucer shaped stop.

Mine currently doesn't have a floor above the rear-end so I can't say for sure but I know my pumpkin hit the old wood floor w/o the axle housing ever bottoming in the c-notch. I didn't have any stops.... I used what was left of the original wood.

*Shane* · 10-01-2007, 11:11 PM

Just read what I typed ... it's NOT a ECE ... it is CPP that i have and the bump stops that came with bolt in notch ...they are the thin type.

I have no bed floor in either and it's hard to tell on a wood floor when its NOT THERE

... if your's hit, then that pretty much seals the deal with mine hitting ... dang it.

Alvin · 10-02-2007, 02:21 PM

I purchased 1/4" taller bumpstops through Summit (Energy Suspension pieces, I can get the part no. later), and as far as I can tell, my diff clears the floor now edit: I have a steel floor(I have CPP bolt-in notch). However, I may be singing a different tune once I get the bed off the rubber pads so the body lines match up.

09-30-2007, 09:28 PM	#1
Jcentsr6 Junior Member Join Date: Jul 2007 Location: Odenton, Md Posts: 552	C-Notch question. If I install a C-notch how much lower can I go before rear tires/rear diff hit the bed. I dont want to cut a hole in the rear bed....but I want to go lower in the rear. I have airbags touching the rear bumpstops right now....thinking of installing a c-notch. Is it worth installing with out cutting the bed?? Thanks in advance guys. __________________ going to sell this one...looking for a SWB project next.

09-30-2007, 10:45 PM	#2
FlatBrokeRacing Registered User Join Date: Mar 2007 Location: Montgomery, Al. Posts: 289	Re: C-Notch question. A bolt in notch is well worth the money.

09-30-2007, 10:55 PM	#3
Jcentsr6 Junior Member Join Date: Jul 2007 Location: Odenton, Md Posts: 552	Re: C-Notch question. I dont mind cutting the frame for a c-notch...but dont want a big hold in my bed. __________________ going to sell this one...looking for a SWB project next.

09-30-2007, 11:02 PM	#4
PrerunnerRob Registered User Join Date: Jan 2007 Location: San Jose Posts: 847	Re: C-Notch question. It has to do with the tire overall diamater as to how much you have to cut, so the bigger the diamater, the more that needs to be removed.

09-30-2007, 11:19 PM	#5
SactoJim Registered User Join Date: Oct 2005 Location: Sacramento, CA Posts: 1,970	Re: C-Notch question. How much further can the axle tube go past the bottom of the frame rail (into a "C" notch) before the top of the diff section hits the bottom of the bed floor? __________________ 72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank - My Build Thread

09-30-2007, 11:57 PM	#6
Jcentsr6 Junior Member Join Date: Jul 2007 Location: Odenton, Md Posts: 552	Re: C-Notch question. I have 295/45/20 rear tires. __________________ going to sell this one...looking for a SWB project next.

10-01-2007, 12:39 PM	#7
Slammed67 Progress = 0% Join Date: Nov 2001 Location: Kansas City, MO Posts: 2,108	Re: C-Notch question. If I recall correctly, if you use the rubber bumpers that are supplied with the notch, the diff won't hit the bed floor. However, if you remove them, you will have clearance issues. __________________ Jason - '67 GMC swb \| '57 Bel-Air 4dr hardtop \| '56 210 4dr Wagon \| 2000 GMC Sierra

10-01-2007, 05:42 PM	#9
see ten WTB this ad Join Date: Sep 2004 Location: Lafayette Georgia Posts: 5,074	Re: C-Notch question. My truck only has about an inch difference between the distance from the frame to the axle and the diff to the floor. So in reality I could only gain another inch of clearance before hitting the floor by adding a notch. I've seen lot's of 4x4 guys shave the bottom of the diff for more ground clearance. I don't see why it couldn't be done to the top of a diff to give you more clearance for the bed floor.

10-01-2007, 06:19 PM	#10
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,939	Re: C-Notch question. The bolt-in style c-notches come w/bumpstops. If you install the bumpstops, the rear pumpkin won't hit the bedfloor. Install the c-notch w/o the bumpstop....the pumpkin will hit the floor. The bolt-in c-notch has a 3" depth & the urethane bump-stop is 1.5". If your current frame is not cut, you would gain approx 1.5" + the height of the current bump-stop & bracket (I don't have one so I can't get that measurement for you). Hope this helps..... Scot. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-01-2007, 07:35 PM	#11
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: C-Notch question. My ECE bumpstop is only about 1/2" - 3/4" thick ... small saucer shaped stop.

10-01-2007, 11:11 PM	#13
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: C-Notch question. Just read what I typed ... it's NOT a ECE ... it is CPP that i have and the bump stops that came with bolt in notch ...they are the thin type. I have no bed floor in either and it's hard to tell on a wood floor when its NOT THERE ... if your's hit, then that pretty much seals the deal with mine hitting ... dang it. Last edited by Shane; 10-02-2007 at 10:03 AM.

10-02-2007, 02:21 PM	#14
Alvin Never Done? Join Date: May 2000 Location: Ohio Posts: 1,435	Re: C-Notch question. I purchased 1/4" taller bumpstops through Summit (Energy Suspension pieces, I can get the part no. later), and as far as I can tell, my diff clears the floor now edit: I have a steel floor(I have CPP bolt-in notch). However, I may be singing a different tune once I get the bed off the rubber pads so the body lines match up. __________________ Ethel - The Legend Continues... Ethel has been sold. Last edited by Alvin; 10-02-2007 at 02:21 PM.



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