User Panel
User Panel
User Panel
MD, USA
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Posted: 5/17/2024 11:07:34 PM EDT
Okay. I understand packing the joint and boot with grease during the initial installation. But, the first time I engage 4WD, and the front CV-joints start spinning, doesn't most of the grease sling out into the boot, never to touch the joint again? Is there something I'm missing?
This seems a lot different from a wheel bearing where the grease is mostly captured in the bearing-races. |
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TX, USA
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Posted: 5/17/2024 11:16:41 PM EDT
[#1]
I don’t have any useful device for you.
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Posted: 5/17/2024 11:20:10 PM EDT
[#2]
It slings back in wen you're in reverse.
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NC, USA
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Posted: 5/17/2024 11:20:21 PM EDT
[#3]
Enough of the grease stays in the joint for it to be fine. As long as the boot is intact and sealed its fine.
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Posted: 5/17/2024 11:25:56 PM EDT
[#4]
Quote HistoryOriginally Posted By tacocat: Enough of the grease stays in the joint for it to be fine. As long as the boot is intact and sealed its fine.  Attached File |
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Posted: 5/17/2024 11:28:22 PM EDT
[#5]
Quote HistoryOriginally Posted By tacocat: Enough of the grease stays in the joint for it to be fine. As long as the boot is intact and sealed its fine. I've never seen a bad CV joint with an intact boot. |
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Posted: 5/17/2024 11:32:20 PM EDT
[Last Edit: FGracing]
[#6]
Originally Posted By VikingPanels: Okay. I understand packing the joint and boot with grease during the initial installation. But, the first time I engage 4WD, and the front CV-joints start spinning, doesn't most of the grease sling out into the boot, never to touch the joint again? Is there something I'm missing? This seems a lot different from a wheel bearing where the grease is mostly captured in the bearing-races. FWD cars have had CV joints for decades. They are not just on 4WD trucks. As long as you have the proper amount of grease, you'll be fine. Also, unless you have free wheeling hubs, the axles are always spinning. The 4WD engages the drive shaft to the front differential. |
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TX, USA
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Posted: 5/17/2024 11:51:39 PM EDT
[#7]
As the vehicle moves it warms the grease up so it flows easier.
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Posted: 5/17/2024 11:55:50 PM EDT
[#8]
Originally Posted By VikingPanels: Okay. I understand packing the joint and boot with grease during the initial installation. But, the first time I engage 4WD, and the front CV-joints start spinning, doesn't most of the grease sling out into the boot, never to touch the joint again? Is there something I'm missing? This seems a lot different from a wheel bearing where the grease is mostly captured in the bearing-races. Just make sure to use an appropriate grease with solid lubricants like moly and graphite. You should still get some churn to bring the grease back into the working surfaces of your CV. |
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Posted: 5/18/2024 12:13:34 AM EDT
[#9]
The actual rollers and load bearing surfaces are towards the outside so centrifugal force keeps the grease right where it’s needed.
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Posted: 5/18/2024 12:16:19 AM EDT
[#10]
Ever have one apart? They are a greasy mess.
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CA, USA
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Posted: 5/18/2024 12:53:27 AM EDT
[#11]
Quote HistoryOriginally Posted By FGracing: FWD cars have had CV joints for decades. They are not just on 4WD trucks. As long as you have the proper amount of grease, you'll be fine. Also, unless you have free wheeling hubs, the axles are always spinning. The 4WD engages the drive shaft to the front differential. Quote HistoryOriginally Posted By FGracing: Originally Posted By VikingPanels: Okay. I understand packing the joint and boot with grease during the initial installation. But, the first time I engage 4WD, and the front CV-joints start spinning, doesn't most of the grease sling out into the boot, never to touch the joint again? Is there something I'm missing? This seems a lot different from a wheel bearing where the grease is mostly captured in the bearing-races. FWD cars have had CV joints for decades. They are not just on 4WD trucks. As long as you have the proper amount of grease, you'll be fine. Also, unless you have free wheeling hubs, the axles are always spinning. The 4WD engages the drive shaft to the front differential. Some rear wheel drive cars have CV joints for decades before FWD cars |
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Posted: 5/18/2024 2:23:07 PM EDT
[#12]
When properly packed there is enough grease so that even though it does go to the surface of the boot (the outside of the joint) there is enough to still be touching the joint as it is spinning. The result is the grease slowly circulates inside the boot, lubricating the joint.
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FL, USA
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Posted: 5/18/2024 2:31:31 PM EDT
[#13]
Quote HistoryOriginally Posted By devildog3062: Some rear wheel drive cars have CV joints for decades before FWD cars Although constant velocity joints were around for other applications before this, As far as I can tell the first automobile with a cv joint was the 1926 Tracta, a french front wheel drive car. |
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USA
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Posted: 5/18/2024 2:34:55 PM EDT
[#14]
Quote HistoryOriginally Posted By FJB247: I've never seen a bad CV joint with an intact boot.  To be fair when you break it and it comes apart or spins, it will tear the boot. |
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Posted: 5/18/2024 2:39:50 PM EDT
[#15]
Quote HistoryOriginally Posted By FJB247: I've never seen a bad CV joint with an intact boot. It's kinda astonishing. Just three of our Hondas reached almost 700K miles (combined), never replaced a boot, never replaced a half shaft. |
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CA, USA
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Posted: 5/18/2024 2:58:16 PM EDT
[#16]
Quote HistoryOriginally Posted By TheLookingGlass: Although constant velocity joints were around for other applications before this, As far as I can tell the first automobile with a cv joint was the 1926 Tracta, a french front wheel drive car. Quote HistoryOriginally Posted By TheLookingGlass: Originally Posted By devildog3062: Some rear wheel drive cars have CV joints for decades before FWD cars Although constant velocity joints were around for other applications before this, As far as I can tell the first automobile with a cv joint was the 1926 Tracta, a french front wheel drive car. Wow I thought CV was more modern. I was talking about the IRS 69 beetle. I stand corrected. |
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