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Old 02-12-2019, 03:43 PM   #51 (permalink)
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the 9901 did break a hero case though, it seized
Who is 9901?

Edit: N/M. I'll have to call him and see what's up. Haven't heard the report yet. We just sent him gear sets for a gear swap.
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Old 02-13-2019, 09:28 PM   #52 (permalink)
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Randy Slawson also lost a rear end,
which took out his transfer case as well.
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10-4, thanks for the Cliff's notes... I don't think I ever read the "bounty thread" so I was/am clueless on this. Sounds to me like camo is a HGTD douchebag though.
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Old 02-14-2019, 10:58 AM   #53 (permalink)
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Randy Slawson also lost a rear end,
which took out his transfer case as well.
my understanding of his facespace post was both tcases were good, it was just misdiagnosed from the beginning and it was always the rearend
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Old 02-14-2019, 02:58 PM   #54 (permalink)
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my understanding of his facespace post was both tcases were good, it was just misdiagnosed from the beginning and it was always the rearend
randy is running two transfer cases?
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Old 02-14-2019, 03:28 PM   #55 (permalink)
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randy is running two transfer cases?
came into pits with drivetrain issue, swapped tcase and the issue was still there. turns out it was the rear diff.
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Old 02-15-2019, 07:50 AM   #56 (permalink)
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Are these all LP GW 10's?
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Old 02-15-2019, 12:49 PM   #57 (permalink)
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Are these all LP GW 10's?
I believe so.
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Old 02-15-2019, 01:44 PM   #58 (permalink)
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And to top it off .. Jeremy from GW broke his ankle or leg, rough week!
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Old 02-15-2019, 01:52 PM   #59 (permalink)
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I wonder if the cold had anything to do with it. 250wt has got to be nasty at 20 degs.
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Old 02-15-2019, 02:00 PM   #60 (permalink)
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You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
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Old 02-16-2019, 05:50 AM   #61 (permalink)
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You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
Iíve seen them doing it in past years. Didnít wander thru the staging lanes this year though.
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Old 02-17-2019, 09:08 PM   #62 (permalink)
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I wonder if the cold had anything to do with it. 250wt has got be nasty at 20 degs.
Thats what I was wondering, i bet the pinion bearings got wiped out before the oil got heated up enough.
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Old 02-18-2019, 10:33 AM   #63 (permalink)
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Jorden Pelegrino said during the KOH Experience that his rear diff got to 370 degrees before it seized. Tony stated that they were "Obviously" going to the manufacturer for answers.
We had heard earlier that he lost oil due to leaky seals in his "Prototype" diffs that 4 of the T1 trucks were also using. That info came from a secondhand source so take it for what it's worth.
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Old 02-21-2019, 07:20 AM   #64 (permalink)
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I wonder if the cold had anything to do with it. 250wt has got to be nasty at 20 degs.
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Originally Posted by 65Chevy4x4 View Post
You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
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Iíve seen them doing it in past years. Didnít wander thru the staging lanes this year though.
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Thats what I was wondering, i bet the pinion bearings got wiped out before the oil got heated up enough.
I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
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Old 02-21-2019, 02:43 PM   #65 (permalink)
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I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.

I have seen numerous cars on jacks getting their diffs warm before ultra4 races.
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Old 02-21-2019, 04:05 PM   #66 (permalink)
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I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
This year was the coldest to date. But I will say. Dave had us line up at 7am. Much later than past years. But even than. These diffs sat in sub 30 deg weather all night. It'd take sometime to warn them up on stands, than sit again for at least and hour. That oil would be crazy thick at start, and they just hammer down.
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Old 02-21-2019, 07:54 PM   #67 (permalink)
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I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
Pretty sure the dude who runs/owns Gearworks was Nick Nelsonís co-driver.
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Old 02-22-2019, 07:13 AM   #68 (permalink)
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I have seen numerous cars on jacks getting their diffs warm before ultra4 races.
In 3 years I haven't that I recall. Maybe I am focused on my own stuff...

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....That oil would be crazy thick at start, and they just hammer down.
yup... instant issue a la Nelson

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Pretty sure the dude who runs/owns Gearworks was Nick Nelsonís co-driver.
I wonder what he would say about warming the oil and ambient temp vs all the KOH early rear diff losses.
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Old 02-22-2019, 08:36 AM   #69 (permalink)
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This year was the coldest to date. But I will say. Dave had us line up at 7am. Much later than past years. But even than. These diffs sat in sub 30 deg weather all night. It'd take sometime to warn them up on stands, than sit again for at least and hour. That oil would be crazy thick at start, and they just hammer down.
This makes zero sense to me.
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Old 02-22-2019, 08:39 AM   #70 (permalink)
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This makes zero sense to me.
It's the 250wt oil. Not 75-90. The GearWorks stuff requires a super thick oil. at room temp it barely wants to move out of the oil jug.
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Old 02-22-2019, 09:40 AM   #71 (permalink)
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It's the 250wt oil. Not 75-90. The GearWorks stuff requires a super thick oil. at room temp it barely wants to move out of the oil jug.
I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
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Old 02-22-2019, 09:48 AM   #72 (permalink)
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I understand that. Heavy weight is needed because of heat generated correct? I dont know, I just put in the oil GW tells me

Are the bearings burning up in a mile? 2 miles? Instantly? Both. Nick Nelson reported feeling it right off the start line. My guess is its so thick its forcing defection but that might be dumb. I think its safe to say the damage starts at the start line, jamming 650 to 800 HP down the 3rd's throat

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move? only happened in rear LP, not in front HP. I am sure there is a reason, it could be more force on the rear or design.

All great questions.
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Old 02-22-2019, 09:50 AM   #73 (permalink)
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I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
I'm assuming it would get slung off, and take a long time to drain back down to the gear to get slung back up to the pinion and help with lubrication. See the Banks youtube channel for the gear oil stuff he's been doing. If it's as thick as molasses when they start, I can't see it draining back down or effectively getting into the pinion bearing to provide much lubrication until it warms up.
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Old 02-22-2019, 09:51 AM   #74 (permalink)
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I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
There's a video on FB, I'm trying to find it. They are trying to pour 250wt into a diff when it was cold, not even freezing. Hold the jug upside down and it doesn't come out of the 2" opening. The shit is crazy thick.
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Old 02-22-2019, 10:24 AM   #75 (permalink)
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I'm assuming it would get slung off, and take a long time to drain back down to the gear to get slung back up to the pinion and help with lubrication. See the Banks youtube channel for the gear oil stuff he's been doing. If it's as thick as molasses when they start, I can't see it draining back down or effectively getting into the pinion bearing to provide much lubrication until it warms up.
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There's a video on FB, I'm trying to find it. They are trying to pour 250wt into a diff when it was cold, not even freezing. Hold the jug upside down and it doesn't come out of the 2" opening. The shit is crazy thick.
Searching and I found this video.
https://www.youtube.com/watch?v=Y-FYdAzLjg8
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