Rolled rear pinion fluid level 14 bolt - The 1947 - Present Chevrolet & GMC Truck Message Board Network

6600DURAMAX · 03-11-2022, 01:23 PM

For my K5 build I have rolled the rear pinion up and need to determine how high I should fill the fluid ? Typically you would just fill to the top of side plug "fill hole" but with it rolled afraid that will leave the pinion dry.... don't want to put too much in however either ....

**Accelo** · 03-11-2022, 04:14 PM

The rolling of the gear in the lubricant will disperse it to the pinion bearings. Typically the fluid level is right at the bottom of the axle tubes. If your wheel bearings are lubricated with the differential fluid you will want to keep the level the same on the tubes.

6600DURAMAX · 03-11-2022, 04:22 PM

Seems like if I was to keep the level similar to original pinion angle I would need to have fluid level to roughly the top of the tubes

**kwmech** · 03-11-2022, 04:23 PM

You're going to be overfilling it anyways with the pinion rolled up that high as you rolled the fill hole with it. If you fill to the hole you'll probably end up with over 2 gallons in it as the tubes will fill up completely....I'm thinking you may have oiling problems with it that high regardless of how much you put in. Filling a dry 14 bolt takes between 4 and 5 quarts. Pic of whole vehicle please

6600DURAMAX · 03-11-2022, 05:03 PM

current pic as it sits and waits for 6L80e to return ....

**kwmech** · 03-11-2022, 05:17 PM

You may end up rolling the pinion back down some if I am seeing that correctly from that angle

6600DURAMAX · 03-11-2022, 05:28 PM

Angle was confirmed with Tom Woods driveshafts before they built my shafts so it should be good. Just need to verify that filling of the tubes doesn't create any adverse effect. I do have all new seals and bearing during re-build

**kwmech** · 03-12-2022, 01:53 AM

So you had this fully assembled prior to this pic?

6600DURAMAX · 03-12-2022, 10:52 AM

This is a new build, but I did mockup everything including driveshafts ect..... before tearing down for powdercoating

k29349 · 03-12-2022, 09:31 PM

I hope you had the full weight of the rig on the frame when you did the mock up. I'm talking body, engine, bumpers, interior, ect. It looks like you will need to run it a little above the center line of the axle tubes and make sure it is vented good.

k29349 · 03-12-2022, 09:37 PM

I hope you had the full weight of the rig on the frame when you did the mock up. I'm talking body, engine, bumpers, interior, ect.

03-11-2022, 01:23 PM	#1
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Rolled rear pinion fluid level 14 bolt For my K5 build I have rolled the rear pinion up and need to determine how high I should fill the fluid ? Typically you would just fill to the top of side plug "fill hole" but with it rolled afraid that will leave the pinion dry.... don't want to put too much in however either .... Attached Images __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years Last edited by LockDoc; 03-11-2022 at 01:37 PM. Reason: Flipped Picture

03-11-2022, 04:14 PM	#2
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,299	Re: Rolled rear pinion fluid level 14 bolt The rolling of the gear in the lubricant will disperse it to the pinion bearings. Typically the fluid level is right at the bottom of the axle tubes. If your wheel bearings are lubricated with the differential fluid you will want to keep the level the same on the tubes.

03-11-2022, 04:22 PM	#3
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Re: Rolled rear pinion fluid level 14 bolt Seems like if I was to keep the level similar to original pinion angle I would need to have fluid level to roughly the top of the tubes __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years

03-11-2022, 04:23 PM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,641	Re: Rolled rear pinion fluid level 14 bolt You're going to be overfilling it anyways with the pinion rolled up that high as you rolled the fill hole with it. If you fill to the hole you'll probably end up with over 2 gallons in it as the tubes will fill up completely....I'm thinking you may have oiling problems with it that high regardless of how much you put in. Filling a dry 14 bolt takes between 4 and 5 quarts. Pic of whole vehicle please

03-11-2022, 05:03 PM	#5
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Re: Rolled rear pinion fluid level 14 bolt current pic as it sits and waits for 6L80e to return .... Attached Images __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years

03-11-2022, 05:17 PM	#6
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,641	Re: Rolled rear pinion fluid level 14 bolt You may end up rolling the pinion back down some if I am seeing that correctly from that angle

03-11-2022, 05:28 PM	#7
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Re: Rolled rear pinion fluid level 14 bolt Angle was confirmed with Tom Woods driveshafts before they built my shafts so it should be good. Just need to verify that filling of the tubes doesn't create any adverse effect. I do have all new seals and bearing during re-build __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years

03-12-2022, 01:53 AM	#8
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,641	Re: Rolled rear pinion fluid level 14 bolt So you had this fully assembled prior to this pic?

03-12-2022, 10:52 AM	#9
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Re: Rolled rear pinion fluid level 14 bolt This is a new build, but I did mockup everything including driveshafts ect..... before tearing down for powdercoating __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years

03-12-2022, 09:31 PM	#10
k29349 Registered User Join Date: Nov 2013 Location: Inman S.C. Posts: 67	Re: Rolled rear pinion fluid level 14 bolt I hope you had the full weight of the rig on the frame when you did the mock up. I'm talking body, engine, bumpers, interior, ect. It looks like you will need to run it a little above the center line of the axle tubes and make sure it is vented good. Last edited by k29349; 03-12-2022 at 09:37 PM.

03-12-2022, 09:37 PM	#11
k29349 Registered User Join Date: Nov 2013 Location: Inman S.C. Posts: 67	Re: Rolled rear pinion fluid level 14 bolt I hope you had the full weight of the rig on the frame when you did the mock up. I'm talking body, engine, bumpers, interior, ect.



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