9.5" 10.5" or 11.5" rear end pinion seal option - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 07-05-2010, 07:48 PM   #1 (permalink)
VipeRTBlck
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9.5" 10.5" or 11.5" rear end pinion seal option

pinion seal is leaking and im going to replace it, autozone said i have those 3 options(9.5, 10.5, 11.5), advance auto parts said it's a 10.5" anybody know?? also, once i remove drive shaft, and take nut off pinion; will the yoke slide right off or is it a pressed fit??
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Old 07-05-2010, 07:56 PM   #2 (permalink)
CNY6.5TD
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The diesels all have the AAM 11.5"
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ROOtS: 93 2500 4x4 rclb. 5 spd 97-up block with intake off/ IP off the 93, IP turned up, timing advanced slightly, manual waste gate running about 14psi through a gm-8, 3 inch exhaust straight through from the turbo to the 5 inch stacks behind the cab. ........ That old gal has been gone quite a while now and i still miss her :-(

01 GMC 2500hd ecsb Dmax/Alli. 4" exhaust to 5" single stack,EDGE Insight CTS, EFI Ridge Runner DSP5, Suncoast stage IV, Kryptonite center link/tierods, PISK by ME, 305/55/R20 Cooper Zeon's on Rockstars. Eaton E-locker. So cal stage I heads, and a little bit of laughing gas, Flex-a-lite electric fans.

07.5 2500hd LMM, LTZ, CCSB, Some kinda beefy tie rods and PISK, S475 over stock by Extreme Pile Racing (EPR), Freedom Diesel Tranny, 40% over sticks, Air Dog Lift pump.
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Old 07-05-2010, 08:02 PM   #3 (permalink)
VipeRTBlck
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what's aam? and is there anyway i can confirm the 11.5"?
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Old 07-05-2010, 08:09 PM   #4 (permalink)
VipeRTBlck
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40006189 G18 GSC is cast into the rear end housing itself; does this help or mean anything?
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Old 07-05-2010, 08:20 PM   #5 (permalink)
Shadow1
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Yep 11.5" ring gear, 14 bolt cover. AAM manufactures the axle and it has an Eaton G80 differential in it -- some few have open differentials.

Now this is for a Duramax or 8.1 liter gas engine.

CNY6.5TD, I believe, works on drivelines professionally so he's a credible source for information.
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Old 07-06-2010, 08:10 AM   #6 (permalink)
CNY6.5TD
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Quote:
Originally Posted by Shadow1 View Post
Yep 11.5" ring gear, 14 bolt cover. AAM manufactures the axle and it has an Eaton G80 differential in it -- some few have open differentials.

Now this is for a Duramax or 8.1 liter gas engine.

CNY6.5TD, I believe, works on drivelines professionally so he's a credible source for information.

I build driveshafts and work in a machine shop that does a wide array of repair and fabrication and the business is coupled with a truck shop that builds Fuel oil delivery trucks. So i do very little "professional repair" on duramax trucks, but im a chevy guy and try to stay up on the stuff.

Its pretty simple though, 2500hd trucks have the 10.5 with 6.0s and 11.5s with a duramax or big block.
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ROOtS: 93 2500 4x4 rclb. 5 spd 97-up block with intake off/ IP off the 93, IP turned up, timing advanced slightly, manual waste gate running about 14psi through a gm-8, 3 inch exhaust straight through from the turbo to the 5 inch stacks behind the cab. ........ That old gal has been gone quite a while now and i still miss her :-(

01 GMC 2500hd ecsb Dmax/Alli. 4" exhaust to 5" single stack,EDGE Insight CTS, EFI Ridge Runner DSP5, Suncoast stage IV, Kryptonite center link/tierods, PISK by ME, 305/55/R20 Cooper Zeon's on Rockstars. Eaton E-locker. So cal stage I heads, and a little bit of laughing gas, Flex-a-lite electric fans.

07.5 2500hd LMM, LTZ, CCSB, Some kinda beefy tie rods and PISK, S475 over stock by Extreme Pile Racing (EPR), Freedom Diesel Tranny, 40% over sticks, Air Dog Lift pump.
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Old 07-06-2010, 11:01 AM   #7 (permalink)
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Quote:
Originally Posted by VipeRTBlck View Post
pinion seal is leaking and im going to replace it, autozone said i have those 3 options(9.5, 10.5, 11.5), advance auto parts said it's a 10.5" anybody know?? also, once i remove drive shaft, and take nut off pinion; will the yoke slide right off or is it a pressed fit??
Hey bud, you def have the 11.5" American Axle Manuf. as others have stated. The pinion nut is on with a sealant/loctite originally from GM, so there will be much resistance when you attempt to remove it. You may want a puller to remove the yoke. A simple bolt style puller will work so you an thread the bolts into the ears of the yoke and place the center cap of the puller on the tapered hole in the pinion shaft. You will lose some fluid so have a qt of 75W-90 synthetic on hand to replace. Good luck.
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Old 07-06-2010, 09:26 PM   #8 (permalink)
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sounds good; thanks for everybodies help so far!
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Old 07-11-2010, 04:00 PM   #9 (permalink)
VipeRTBlck
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well i was ready to buzz the big nut off today with an impact and found out it's a size that i dont have(go figure) my 1 1/4" is too small, and 1 1/2" is too big, anybody know what size i need? I'm sure I can find it at work(bein an odd 12 point nut this big).

Also is there an actual torque spec for reinstalling this nut, or should i be ok just buzzing it up with the impact and not OVERTIGHTENING it? I've done this task on a half ton before and just buzzed it up, it's still fine to this day and that was 5 or 6 years ago.

thanks again in advance
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Old 07-11-2010, 07:24 PM   #10 (permalink)
CNY6.5TD
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Quote:
Originally Posted by VipeRTBlck View Post
well i was ready to buzz the big nut off today with an impact and found out it's a size that i dont have(go figure) my 1 1/4" is too small, and 1 1/2" is too big, anybody know what size i need? I'm sure I can find it at work(bein an odd 12 point nut this big).

Also is there an actual torque spec for reinstalling this nut, or should i be ok just buzzing it up with the impact and not OVERTIGHTENING it? I've done this task on a half ton before and just buzzed it up, it's still fine to this day and that was 5 or 6 years ago.

thanks again in advance
Im not sure what size the nut is. Normally i would just hammer on a used crush sleed with an impact, but you should be fine buzzing the nut back on snug with an impact. I havent set up an 11.5 yet just changed a few pinion seals, but from talking to the guys that have set em, your not going to over crush that crush sleeve with any run of the mill impact gun.
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ROOtS: 93 2500 4x4 rclb. 5 spd 97-up block with intake off/ IP off the 93, IP turned up, timing advanced slightly, manual waste gate running about 14psi through a gm-8, 3 inch exhaust straight through from the turbo to the 5 inch stacks behind the cab. ........ That old gal has been gone quite a while now and i still miss her :-(

01 GMC 2500hd ecsb Dmax/Alli. 4" exhaust to 5" single stack,EDGE Insight CTS, EFI Ridge Runner DSP5, Suncoast stage IV, Kryptonite center link/tierods, PISK by ME, 305/55/R20 Cooper Zeon's on Rockstars. Eaton E-locker. So cal stage I heads, and a little bit of laughing gas, Flex-a-lite electric fans.

07.5 2500hd LMM, LTZ, CCSB, Some kinda beefy tie rods and PISK, S475 over stock by Extreme Pile Racing (EPR), Freedom Diesel Tranny, 40% over sticks, Air Dog Lift pump.
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