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post #31 of 36 (permalink) Old 01-08-2006, 06:37 PM
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Regarding belt based E-CVT, what does the reqired maintenance guide of the HCH say?

E-CVT isn't just for electric - ICE power transfer transitions, but rather that's how gear ratio is changed. The ICE goes at a relatively constant RPM for the power demand, and the cones shift the belts so that the engine to wheel gearing changes continuously. The results are not much unlike our Prius, but does have wear and tear. Any belt would. Remember timing belts? Those needed replacement at some point, and they aren't sliding up and down the gear!
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post #32 of 36 (permalink) Old 01-08-2006, 10:38 PM
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Originally Posted by DanMan32
Regarding belt based E-CVT, what does the reqired maintenance guide of the HCH say?

E-CVT isn't just for electric - ICE power transfer transitions, but rather that's how gear ratio is changed. The ICE goes at a relatively constant RPM for the power demand, and the cones shift the belts so that the engine to wheel gearing changes continuously. The results are not much unlike our Prius, but does have wear and tear. Any belt would. Remember timing belts? Those needed replacement at some point, and they aren't sliding up and down the gear!
I believe Hyperion mentioned that the Honda people take the whole CVT send it back to Japan and have them rebuild to retrofit again to that Hybrid Civic. My Toyota techs Friends at the Honda says that they have done many already "Under" warranty with mileage _Less-Than_ 60k... The Belts are friction prone and has to expand thus Polymer-Metal fatigue is more accelerated than the direct gear mesh of the Toyota system...

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post #33 of 36 (permalink) Old 01-08-2006, 11:30 PM
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Rick, not the Honda people, the Toyota. All I know about the Civic is the one week of driving one. Compared with the prius, the cars are very similar.



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post #34 of 36 (permalink) Old 01-09-2006, 12:57 AM
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Rick, not the Honda people, the Toyota. All I know about the Civic is the one week of driving one. Compared with the prius, the cars are very similar.
No Hyperion, The Toyota Power split devise or the E-CVT are crafted and machined to an Aero-space spec tolerance that rebuilding is almost impossible, If one of Toyota E-CVT fails it is sent back for analysis and studied. A rare case indeed. I have seen report that one Tranny exploded and Toyota installed a new one. No re-build ones will be retrofitted but if and when this ever happens then a New ones goes in to that Prius.

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post #35 of 36 (permalink) Old 01-09-2006, 08:13 AM
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As I had posted before, that was my dad's experience 2 decades ago. Planetary gear systems are custom machined as a set. Less problem prone to replace than rebuild.
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post #36 of 36 (permalink) Old 01-09-2006, 10:07 AM
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That's exactly what my service manager told me. The whole unit (if a problem developed) would be removed and returned to Japan. Of course, it would be replaced with a new unit but eventually after many returns I'm sure the returned units would be rebuilt in Japan.
You'll never find one of these units in any transmission shop in the U.S.
However, I have torn down a transmission in an old Jag XK 120, replaced half the gears and driven the car another 70,000 miles before selling it.



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