Another Rear Question.. Well two.. but easy ones! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ShortBedChevy · 05-26-2004, 10:35 AM

Ok, two more questions... I can repair my rear end for $30... I need to replace two spider gears in the posi unit... I have the little bolt that holds that big bar off, the two spider gears go on the bar, but i can't seem to get the bar to come all the way it, its moves a bit now, but wont come out, any suggestions?

here is a picture, you can see the bar.. .the two spider gears are gone, as they blew apart also the two "washers"? that go on the outside of them... but everything else is perfect...

here is basically what i need minus the two side gears...

Also, when i am all done.. I know this is stupid... But how exactly do i fill the rear end back up with oil?
Thanks guys and gals....

**Captkaos** · 05-26-2004, 11:20 AM

To get the crosspin out:
Push the axles in, remove the C-clips, pull the axles back out partially (so they aren't in the gears) and pull the gears out. Then push the crosspin out.

For filling:
There is a plug on the passenger side of the axle remove it and fill until it starts pouring out.

ShortBedChevy · 05-27-2004, 10:09 AM

Sounds good, thanks a lot!
Do i need to remove the tires from the truck to slide the axles out a bit? they are 6 lug...
Thanks!

Jonboy · 05-27-2004, 10:16 AM

Removing the tires will make everything a LOT easier to deal with, especially getting everything put back together. You will not run as much risk messing up the splines, either.

ShortBedChevy · 05-27-2004, 10:26 AM

alright great, thats about all i need to know i believe... Well, i can leave the drum brakes on though right? that is mostly the reason i dont want to put in an intire new rear.. that and this is a cheaper way..
Thank you guys so much!

**Captkaos** · 05-27-2004, 10:44 AM

You are going to have remove the tires and the drum to get the axle out.

ChevyTech · 05-27-2004, 01:02 PM

The shaft you are trying to remove must come out BEFORE the axle C-clips and axles can be removed. Are you sure that all of the bolt came out. It is very comon for them to break off near the end of the threads. A striaght pin like protrusion extends far beyond the threaded portion of the bolt.

ShortBedChevy · 05-28-2004, 10:23 AM

I finally got the pin out.. we all must be talking about different things because i didnt have to remove my axles.. i believe its call the differential pin, or spider gear pin or something like that.. the reason i couldnt get it out, was because it was actually bent!!!
Pictures coming soon

Opper77 · 05-28-2004, 11:43 PM

When I redid my rearend, my pin was bent also...

If you can get all four gears cheap, do it.. Over time the gears will develop a wear pattern, and when you swap out a few of them, you may notice they don't run too smoothly after.. This is because the newer gears have a different wear pattern. (which is why you get a matched ring and pinion) If you can swap all of them, you can avoid this..

I guess it all depends on how much $$ you have, how picky you are, and how much work you want to do..

05-26-2004, 10:35 AM	#1
ShortBedChevy Registered User Join Date: Feb 2004 Location: Billings, Montana Posts: 37	Another Rear Question.. Well two.. but easy ones! Ok, two more questions... I can repair my rear end for $30... I need to replace two spider gears in the posi unit... I have the little bolt that holds that big bar off, the two spider gears go on the bar, but i can't seem to get the bar to come all the way it, its moves a bit now, but wont come out, any suggestions? here is a picture, you can see the bar.. .the two spider gears are gone, as they blew apart also the two "washers"? that go on the outside of them... but everything else is perfect... here is basically what i need minus the two side gears... Also, when i am all done.. I know this is stupid... But how exactly do i fill the rear end back up with oil? Thanks guys and gals.... __________________ Chris www.70chargerrt500.150m.com Last edited by ShortBedChevy; 05-26-2004 at 10:46 AM.

05-26-2004, 11:20 AM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	To get the crosspin out: Push the axles in, remove the C-clips, pull the axles back out partially (so they aren't in the gears) and pull the gears out. Then push the crosspin out. For filling: There is a plug on the passenger side of the axle remove it and fill until it starts pouring out. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

05-27-2004, 10:09 AM	#3
ShortBedChevy Registered User Join Date: Feb 2004 Location: Billings, Montana Posts: 37	Sounds good, thanks a lot! Do i need to remove the tires from the truck to slide the axles out a bit? they are 6 lug... Thanks! __________________ Chris www.70chargerrt500.150m.com

05-27-2004, 10:16 AM	#4
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Removing the tires will make everything a LOT easier to deal with, especially getting everything put back together. You will not run as much risk messing up the splines, either. __________________ 1974 Jimmy- 5.3/4L80e/NP241

05-27-2004, 10:26 AM	#5
ShortBedChevy Registered User Join Date: Feb 2004 Location: Billings, Montana Posts: 37	alright great, thats about all i need to know i believe... Well, i can leave the drum brakes on though right? that is mostly the reason i dont want to put in an intire new rear.. that and this is a cheaper way.. Thank you guys so much! __________________ Chris www.70chargerrt500.150m.com

05-27-2004, 10:44 AM	#6
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	You are going to have remove the tires and the drum to get the axle out. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

05-27-2004, 01:02 PM	#7
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,621	The shaft you are trying to remove must come out BEFORE the axle C-clips and axles can be removed. Are you sure that all of the bolt came out. It is very comon for them to break off near the end of the threads. A striaght pin like protrusion extends far beyond the threaded portion of the bolt.

05-28-2004, 10:23 AM	#8
ShortBedChevy Registered User Join Date: Feb 2004 Location: Billings, Montana Posts: 37	I finally got the pin out.. we all must be talking about different things because i didnt have to remove my axles.. i believe its call the differential pin, or spider gear pin or something like that.. the reason i couldnt get it out, was because it was actually bent!!! Pictures coming soon __________________ Chris www.70chargerrt500.150m.com

05-28-2004, 11:43 PM	#9
Opper77 Ob-Gyn Kenobi Join Date: Aug 2003 Location: Edmonton, Alberta Posts: 489	When I redid my rearend, my pin was bent also... If you can get all four gears cheap, do it.. Over time the gears will develop a wear pattern, and when you swap out a few of them, you may notice they don't run too smoothly after.. This is because the newer gears have a different wear pattern. (which is why you get a matched ring and pinion) If you can swap all of them, you can avoid this.. I guess it all depends on how much $$ you have, how picky you are, and how much work you want to do.. __________________ '85 GMC Shortbox... I used to have a firm handle on life....then it broke off.



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