![]() These "opposing" pressures caused the gear changes through the free-floating gear change valves. The N360/N600 controlled gear changes by balancing a throttle valve and a centrifugal valve. The stator was equipped with a sprag clutch enabling it to freewheel when required. The reaction arm acted directly on the regulator valve this meant that increased pressure was available to the clutch plates when torque multiplication was greatest. The company's early transmissions also used a patented torque converter which used stator force to reduce hydraulic losses by using a reaction arm to increase the hydraulic pressure when the stator was stalled. The Hondamatic incorporated a lockup function, which Honda called a third ratio, and had manual gear selection. Honda initially chose to integrate the transmission and engine block for its first application (in the N600) as in the Mini. Honda was forced to invent their new system due to the vast array of patents on automatic transmission technology held by BorgWarner and others. Instead of a sprag or roller clutch, Honda's older transmissions rely on pressure circuits to modulate line pressure to change gears. This design is also noteworthy because it preserves engine braking by eliminating a sprag between first and second gears. Honda's older transmissions such as the Hondamatic semi-automatic transmission and its successors use traditional, individual gears on parallel axes like a manual transmission, with each gear ratio engaged by a separate hydraulic clutch pack. Most of Honda's automatic transmissions are unusual in that they do not use planetary gears like nearly all other makers, however, Honda has recently introduced (2017) an all-new, in-house designed 10-speed automatic that uses planetary gears. ZF has attributed most of these problems to software issues.Īutomatic/Semi-automatic transmissions However, there have been reports of problems with ZF transmissions and Acura recalled its 2015 TLX models. The most notable exception was in 2014, when Honda decided to forgo an in-house designed transmission and chose the ZF 9HP transmission for their Acura TLX V6 model, later extending the offering of the ZF transmission to the Acura MDX, Odyssey, Pilot and Ridgeline. So, check your paperwork very carefully after each service.Honda has long built nearly all of its own automobile transmissions, unlike many other automobile manufacturers which often source transmissions from external sources. A note at the relevant section (24) of the checklist states: CVT: Jazz 2012 MY, Civic/Jazz Hybrid/Insight, New Jazz/HRV 2016 MY - Every 25,000 miles or 2 Years. While checking through the "12,500 mile schedule service checklist" for the last service (2 year) I noticed that the CVT transmission fluid change had not been ticked off as done. Quote from: AlanTR on February 02, 2019, 03:38:59 PM My 16 Reg CVT Jazz is due a 3 year service in March this year. I normally do, but obviously not last time! So, check your paperwork very carefully after each service. We recommend using only genuine Honda HCF-2." This I will be passing onto the Honda dealer Service Manager as I want to officially register the fact that they omitted to change the fluid at the correct interval. I contacted Honda Customer Service by e-mail and they replied stating: "Please be advised that the recommended servicing schedule intervals for changing the CVT transmission fluid on your 2016 Jazz is every 25 000 miles or every 24 months. Of course the fluid may have been changed and the technician forgot to tick it off - who knows? Our mileage is low so the car will have reached about 26,000 miles at the next service but the fluid change will be 1 year late. I was annoyed with myself for not noticing this before. It was agreed that the fluid change would be done at the upcoming service. I got the impression that the service advisors were not aware of the fluid change schedule. I pointed out that it was scheduled for 2 year or 25,000 mile intervals. I called in at my local dealer, Vertu Honda Sunderland, to book my service and brought to their attention the fact that the CVT transmission fluid had not been ticked off as changed at the last service. ![]() My 16 Reg CVT Jazz is due a 3 year service in March this year.
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