The posi is in - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ackattack · 08-29-2003, 11:28 PM

Well I got my posi installed today. Really wasn't that hard, but I was sweating that the bearing wouldn't get delivered today and the machine shop to press them on would be closed all weekend, but it all worked out.

I'm using the stock 3.08 gears for now. Alls I did to install was check the backlash and wear pattern, pull out the old carrier and switch over the ring gears, and put the new posi unit in. I rechecked the backlash and wear pattern and that's it. Took it for a test drive and it's nice and quite from what I could tell over the exhaust and other noise (even shut it off and coasted...but then the ring gear is driving the pinion, rather than the other way around like it is when you're on the gas). I didn't really test it out to see if it worked (both tires spin that is) cause I figured it needed some break in time, and spinning two big ol' 295/50/15 puts a lot of stress on it.

Class of 69 · 08-29-2003, 11:41 PM

Sounds good!! You did put the posi additive in with the gear lube, right?? Going around tight corners a few times will get the lube in between the clutch plates and then your good to go do some awesome burnouts!! Be sure to take pics!!

Ackattack · 08-29-2003, 11:44 PM

yeah, I put posi additive in there. Actually I had to go get different gear lube too. I was going to put synthetic in there, but it specifically said not to.

I stopped in a parking lot to look it over after a few miles, and then did a few tight circles to each side too.

I guess I'll need line lock soon (got it on my car already...he he)

Class of 69 · 08-29-2003, 11:48 PM

You've got it all under control!!! LET ER RIP!!!

Iceman7642 · 08-30-2003, 12:12 AM

im gonna swap out my c-20 rear end for a c 10.. you got any tips?

how log "should" it take....i took off the c10 pretty easily..but the bed was off and a poly tank wasn't in the way.

thanks
michael

08-29-2003, 11:28 PM	#1
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	The posi is in Well I got my posi installed today. Really wasn't that hard, but I was sweating that the bearing wouldn't get delivered today and the machine shop to press them on would be closed all weekend, but it all worked out. I'm using the stock 3.08 gears for now. Alls I did to install was check the backlash and wear pattern, pull out the old carrier and switch over the ring gears, and put the new posi unit in. I rechecked the backlash and wear pattern and that's it. Took it for a test drive and it's nice and quite from what I could tell over the exhaust and other noise (even shut it off and coasted...but then the ring gear is driving the pinion, rather than the other way around like it is when you're on the gas). I didn't really test it out to see if it worked (both tires spin that is) cause I figured it needed some break in time, and spinning two big ol' 295/50/15 puts a lot of stress on 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

08-29-2003, 11:41 PM	#2
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Sounds good!! You did put the posi additive in with the gear lube, right?? Going around tight corners a few times will get the lube in between the clutch plates and then your good to go do some awesome burnouts!! Be sure to take pics!! __________________ 69 GMC K10 ..some restoration required....still..

08-29-2003, 11:44 PM	#3
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	yeah, I put posi additive in there. Actually I had to go get different gear lube too. I was going to put synthetic in there, but it specifically said not to. I stopped in a parking lot to look it over after a few miles, and then did a few tight circles to each side too. I guess I'll need line lock soon (got it on my car already...he he) __________________ 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

08-29-2003, 11:48 PM	#4
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	You've got it all under control!!! LET ER RIP!!! __________________ 69 GMC K10 ..some restoration required....still..

08-30-2003, 12:12 AM	#5
Iceman7642 P!$$ on Ford Join Date: Jun 2003 Location: Federal Way, WA Posts: 334	im gonna swap out my c-20 rear end for a c 10.. you got any tips? how log "should" it take....i took off the c10 pretty easily..but the bed was off and a poly tank wasn't in the way. thanks michael __________________ [FONT="Impact"][COLOR="Navy"]Michael Lowered 1972 C-20 Longbed with 350 and TH350 1995 Tahoe LS - Custom intake, k&n, TBI spacer, sweet tail lights, clear front lights... 2009 Nissan Versa I am 26, married, and we had our first baby in July of 2009



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