rear end Qs?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rin68 · 03-01-2003, 06:52 PM

Picked up a rear end core to build up today, started to strip everything down.....hit a hangup. When I went to remove the axles, I took out the lock screw but the cross shaft will not come out of the carrier. It's a stock Chevy open diff., anyone have any ideas on what could be holding it up or am I completely missing something??

Also anyone know of a 12 bolt truck specific rear end rebuild guide, I have a couple generic type things, but nothing for just the 12 bolt Thanks

crazy longhorn · 03-01-2003, 07:05 PM

The lock screw has a smooth end on it (no threads), approx 1 1/2" long..........did it all come out?

rin68 · 03-01-2003, 07:08 PM

yeah, the whole thing came out. can the cross shaft go in/out on either end of the carrier? it will wiggle front/back but not left/right (if it was installed in a truck)

TERRYP · 03-01-2003, 08:35 PM

Either end will do.

da-burb · 03-01-2003, 09:22 PM

Quote:

The lock screw has a smooth end on it (no threads), approx 1 1/2" long..........did it all come out?

double check this. The last one I had trouble with was 3/4" shorter than it should have been. The last 3/4" was still in the pin and kept it from moving more than a little bit in or out. If I had known it was in there I would have tried a magnet before I used a 2 pound hammer and a big punch. I did get it busted out of there without mashing my hand in the process.

kaycee · 03-01-2003, 09:58 PM

Also on my 70 the pin will only come out 1 way (I'm serious).This is the only 1 I have that is like that

matt67350 · 03-01-2003, 11:47 PM

Sometimes the pin varnish's up, and can be a bit tight to remove.
I'm working on a 12 bolt now that was that way, just take your time and try to clean around the pin or use brake cleaner to help
brakeup the varnish. Good luck

rin68 · 03-02-2003, 06:35 PM

thanks for all the help, I looked closer at the lock screw and it does look like some of it broke off. how far into the cross shaft does the lock screw go? now i just need to find a small enough magnet or something to dig it out of the carrier.....or just bust out the BFH to pound the cross-shaft out

crazy longhorn · 03-02-2003, 07:13 PM

Well, the hole goes all the way through the cross pin.......i havent measured the depth, but beleive the retainer bolt/pin also goes into the carrier on the other side. They can be a pain.....goood luck,crazyL

Mike C · 03-03-2003, 03:27 PM

Somebody sells a tool now for getting this out. Check with Randy's Ring and Pinion. Broken shaft screws are a PITA.

sneakysnake · 03-03-2003, 03:45 PM

if its not the bolt broke off check for a groove where the spider gears wear, makes a notch that holds the pin from sliding out

03-01-2003, 06:52 PM	#1
rin68 Senior Member Join Date: Mar 2000 Location: East Peoria, IL Posts: 600	rear end Qs?? Picked up a rear end core to build up today, started to strip everything down.....hit a hangup. When I went to remove the axles, I took out the lock screw but the cross shaft will not come out of the carrier. It's a stock Chevy open diff., anyone have any ideas on what could be holding it up or am I completely missing something?? Also anyone know of a 12 bolt truck specific rear end rebuild guide, I have a couple generic type things, but nothing for just the 12 bolt Thanks __________________ 1968 C10 - 383, non-stop project 1969 Camaro - 327, bone stock family heirloom...soon to be LS/T56, Ridetech, all the goodies

03-01-2003, 08:35 PM	#4
TERRYP GYRO GEARLOOSE Join Date: Jun 2000 Location: Nevada City, CAEverett, WA Posts: 361	Either end will do. __________________ Nevada City, CA Everett, Washington 57 3/4 rat, 235, 3spd 66 C-10 Panel, SWB. 350 from '68, 200R4 tranny, 3.07 rear ratio, restoring 68 C10 LWB 350 4spd, 4.56 rear dump runner 82 Camaro, 305, THM-200-R4 84 Monte Carlo 305 TH350, land tuna 85 Tercel SW, snow runner DISGRACED OUTLAW MEMBER OF THE DRUM BRAKE CLUB

03-01-2003, 09:58 PM	#6
kaycee Registered User Join Date: Jan 2000 Location: Wyoming USA Posts: 2,445	Same here Also on my 70 the pin will only come out 1 way (I'm serious).This is the only 1 I have that is like that __________________ 2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327

03-01-2003, 11:47 PM	#7
matt67350 Registered User Join Date: May 2001 Location: Benbrook, TX Posts: 1,060	Sometimes the pin varnish's up, and can be a bit tight to remove. I'm working on a 12 bolt now that was that way, just take your time and try to clean around the pin or use brake cleaner to help brakeup the varnish. Good luck __________________ 69 swb stepside, rebuild and upgrade in progress

03-03-2003, 03:27 PM	#10
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,715	Somebody sells a tool now for getting this out. Check with Randy's Ring and Pinion. Broken shaft screws are a PITA. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

03-01-2003, 07:05 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	The lock screw has a smooth end on it (no threads), approx 1 1/2" long..........did it all come out?

03-01-2003, 07:08 PM	#3
rin68 Senior Member Join Date: Mar 2000 Location: East Peoria, IL Posts: 600	yeah, the whole thing came out. can the cross shaft go in/out on either end of the carrier? it will wiggle front/back but not left/right (if it was installed in a truck)

03-02-2003, 06:35 PM	#8
rin68 Senior Member Join Date: Mar 2000 Location: East Peoria, IL Posts: 600	thanks for all the help, I looked closer at the lock screw and it does look like some of it broke off. how far into the cross shaft does the lock screw go? now i just need to find a small enough magnet or something to dig it out of the carrier.....or just bust out the BFH to pound the cross-shaft out

03-02-2003, 07:13 PM	#9
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Well, the hole goes all the way through the cross pin.......i havent measured the depth, but beleive the retainer bolt/pin also goes into the carrier on the other side. They can be a pain.....goood luck,crazyL

03-03-2003, 03:45 PM	#11
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	if its not the bolt broke off check for a groove where the spider gears wear, makes a notch that holds the pin from sliding out



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