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SUVs Honda CR-V Honda CR-V Rear Differential Problem?
392 messages, Last post on Nov 13, 2009 at 11:34 AM
You are in the Honda CR-V Forum. Your Hosts are steve_ & tidester
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Replying to: wgn4snow (Apr 13, 2007 7:17 pm) |
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Replying to: blueiedgod (Apr 10, 2007 10:33 am)
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Replying to: cdamech (Jun 29, 2007 10:20 pm) NAS |
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Replying to: cdamech (Jun 29, 2007 10:20 pm) Good Luck....
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Replying to: mnf (Jun 30, 2007 8:15 am) My CRV is driving very smooth now and even the shaking when stopped at a Signal light in DRIVE Mode is now gone. I thought that was due to the 4 cylinder engine but WOW, this must be somehow related to the 4 Wheel Drive and you can feel it on the entire Drive Train. It is now gone. My only question is if HONDA knows about this, why are they quietly servicing customers? I wonder when the next this will appear again. The Maintenance schedule calls for at 90,000 KM but I ended up doing this at 28,000 KM. I will keep an eye on this and maybe do this FLUSH every 25,000 KM. I thought HONDAs were solid and I am now thinking not to purchase HONDA for my second vehicle. Anymore thoughts on how many people are seeing this and if HONDA has proactively done a Total RECALL on all CRVs to fix this? I checked RECALL web page for Honda CRVs and there is nothing. CDNMECH
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Replying to: cdamech (Jul 07, 2007 5:14 pm) 2001HondaCRV |
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Replying to: cdamech (Jul 07, 2007 5:14 pm) My CRV is driving very smooth now and even the shaking when stopped at a Signal light in DRIVE Mode is now gone. I thought that was due to the 4 cylinder engine but WOW, this must be somehow related to the 4 Wheel Drive and you can feel it on the entire Drive Train. It is now gone. My only question is if HONDA knows about this, why are they quietly servicing customers? I wonder when the next this will appear again. The Maintenance schedule calls for at 90,000 KM but I ended up doing this at 28,000 KM. I will keep an eye on this and maybe do this FLUSH every 25,000 KM. I thought HONDAs were solid and I am now thinking not to purchase HONDA for my second vehicle. Anymore thoughts on how many people are seeing this and if HONDA has proactively done a Total RECALL on all CRVs to fix this? I checked RECALL web page for Honda CRVs and there is nothing. CDNMECH Glad differential flush fixed your problem. Although I am not sure how the shaking was related to the differential, unless dealer also flushed the tranny (assuming you drive auto). There won't be a recall since this is not a safety related issue. The noise gives you enough warning to change the fluid. As to the longevity of the fluid, it depends on the amount of AWD action you get, and how wet your area is. There is a breather tube on top of the differential and water can get in, which dilutes the fluid. Generally, people have been changing rear differential fluid at 15,000 mile intervals and auto tranny fluid at 30,000 mile intervals.
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Replying to: cdamech (Jun 29, 2007 10:20 pm) "Rear differential" in the CR-V is not a real rear differential, but more like a transfer case and limited slip differential in one. On the 05-06 the fast acting cams engage the rear wheel when the front wheels turn faster than the rear, essentially transferring the power to the rear. Then the rest of the power is transferred through the same dual pump hydraulic system used on Honda's since 1986 Civic Wagon AWD (including 1997-2004 CR-V). The hydraulic system relies on speed differential to create enough pressure to activate the clutch packs to connect the rear wheels to the spinning propeller shaft. When fluid is old or contaminated it may inadvertently engnage the rear, and act as if the transfer case was locked in a conventional 4WD system, hence the scrubbing and the noise. When you turn, the inside wheels travel less distance than the outside wheels. This is side to side differential, CR-V has open differential. But, when you turn the front outside wheel travels more than the rear inside wheel, which in a conventional locked 4WD system will cause binding. Here the rear differential acts as a limited slip transfer case, allowing some slip front to rear so that the driveline does not bind. There is a great video on HondaSUV on how the "Real Time AWD" system works.
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Replying to: blueiedgod (Jul 10, 2007 11:16 am)
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Replying to: cdamech (Jul 12, 2007 2:53 am) It is actaully a lot simpler than other automatic AWD systems out there. Think of VTM that Honda uses on the Pilot/Ridgeline/MDX, it is controlled by the main computer. I think that Marketing people got a hold of the maintenance schedule and changed the intervals, just like they changed the valve adjustment intervals on the First Generation CR-V from 15,000 mile (Acura Integra) to 90,000 mile intervals on the CR-V, which uses essentially the same engine. If you want simple design, Honda is probably not going to fit the bill. The engine in your CR-V constantly advances or retards timing depending on the load, speed, throttle position, and octane rating of the gas. Then, on top of that, the engine (Gen 2 and up) switches from 12 valve operation (from idle to 2500 RPM, VTEC-E mode) to 16 valve operation (from 2500 RPM to 5000 RPM), and then the lift and duration of the valves is adjusted to the high RPM operation (not on CR-V, but on Acura TSX, which is 90% the same). While at the same time changing the ignition advance or retardation. Honda is not about simplicity. Everything they do is about pushing the limits of engineering. But making sure that longevity is preserved. Honda engines pretty much outlive the shell. The new A-VTEC engines that are going into the 2008 Accord are going to be the most advanced gasoline engines out there. Honda had first VTEC in a mass produced vehicle in 1991, it took the rest of the companies at least 10 years to catch up. Now, everyone has a version of it, VVTL-i, VANOS... ect. |
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