Which rear end is the best rear end? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluec10 · 11-17-2003, 10:24 PM

I can't remember if I posted this quesion before, but humour me.

I'm installing a front crossmember and spindles from a '84 Chevy into my '68. I'll need a new rear end so that I've got 5 bolt rims all around. My goal is to run a 400 SB with 425 HP with a 700R4 behind it. Which rear end would be a good swap-in?

*rage'nrat638* · 11-17-2003, 10:39 PM

WELL....blasted my 12 bolt truck rear end right out of my 85

had to do a 4800.00 fab 9...now i blasted 2nd gear out of the th400 w/2800.00 invested in that

850h.p. to much????? i don't think so....it sure is fun

*67Fleetsidedream* · 11-17-2003, 11:04 PM

Depends on what the truck will be used for?

bluec10 · 11-17-2003, 11:16 PM

I'm not going to race the truck, but that doesn't mean that I wont' get leadfootitis from time to time. Mostly cruising?

Glen · 11-17-2003, 11:49 PM

Are you asking for strength or ease of swap? You will blow the 700r4 long before you waste any truck rear end.

gonebad2 · 11-17-2003, 11:57 PM

They are very rare but I once parted out a 69 longbed 1/2 ton. With a Dana 60. It had non-full floating axles and it was a posi. That is the only one I have ever seen. One of the axles was bent at the flange because the truck had rolled. Moser made me another one. Has any other members ever run into one of these rearends? It also had the provision for the panhard bar cast into the housing. Used it on a 69 GMC shortfleet with a 396 and a 700R4. That was one beefy differential.

Scrub · 11-18-2003, 12:00 AM

I kinda like Julia Roberts rearend myself

gonebad2 · 11-18-2003, 12:06 AM

Quote:

Originally posted by Scrub
I kinda like Julia Roberts rearend myself

Jamie Presley does it for me.

lukecp · 11-18-2003, 12:19 AM

I think a 12-bolt truck rear would work fine...i have heard they are as strong stock as a Ford 9". Should bolt right in with the correct conversion U joint too

Ackattack · 11-18-2003, 12:30 AM

Couldn't you just swap 5 lug axles into it?

Longhorn Man · 11-18-2003, 12:38 AM

Just get a 5 lug 71/72 rear.
Bolts in, no fabbing, and you know it'll fit.

11-17-2003, 10:24 PM	#1
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Which rear end is the best rear end? I can't remember if I posted this quesion before, but humour me. I'm installing a front crossmember and spindles from a '84 Chevy into my '68. I'll need a new rear end so that I've got 5 bolt rims all around. My goal is to run a 400 SB with 425 HP with a 700R4 behind it. Which rear end would be a good swap-in? __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

11-17-2003, 11:16 PM	#4
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	I'm not going to race the truck, but that doesn't mean that I wont' get leadfootitis from time to time. Mostly cruising? __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

11-17-2003, 11:57 PM	#6
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	They are very rare but I once parted out a 69 longbed 1/2 ton. With a Dana 60. It had non-full floating axles and it was a posi. That is the only one I have ever seen. One of the axles was bent at the flange because the truck had rolled. Moser made me another one. Has any other members ever run into one of these rearends? It also had the provision for the panhard bar cast into the housing. Used it on a 69 GMC shortfleet with a 396 and a 700R4. That was one beefy differential. __________________ Your Bought And Sold....I Got Your Soul!

11-18-2003, 12:00 AM	#7
Scrub Collector of rusty Items Join Date: Dec 2001 Location: Sisters,Oregon USA Posts: 731	I kinda like Julia Roberts rearend myself __________________ Scrub Sisters, Oregon - Home of the Sisters Rodeo. 70 GMC 1,000,000 + miles 72 K-20 project, 456 Dana60 front, Corp14 rear w/locker, 265R19.5 tires 20-ply. Warn 12k winches both ends, Cross-over steering with raised tie-rod, Powerbox steering, 4500 watt 120-AC power, Air, Hydraulic aux power, 4 inch lift, 5000 lb air-bags both ends.

11-18-2003, 12:19 AM	#9
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	I think a 12-bolt truck rear would work fine...i have heard they are as strong stock as a Ford 9". Should bolt right in with the correct conversion U joint too __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

11-17-2003, 10:39 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	WELL....blasted my 12 bolt truck rear end right out of my 85 had to do a 4800.00 fab 9...now i blasted 2nd gear out of the th400 w/2800.00 invested in that 850h.p. to much????? i don't think so....it sure is fun

11-17-2003, 11:04 PM	#3
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	Depends on what the truck will be used for?

11-17-2003, 11:49 PM	#5
Glen Registered User Join Date: Jan 2003 Location: Chandler, AZ Posts: 189	Are you asking for strength or ease of swap? You will blow the 700r4 long before you waste any truck rear end.

11-18-2003, 12:30 AM	#10
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Couldn't you just swap 5 lug axles into it? __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

11-18-2003, 12:38 AM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Just get a 5 lug 71/72 rear. Bolts in, no fabbing, and you know it'll fit.



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