Agreed. In fact, the ZF and the Ford 6R60 is the same design (but use separate 1234 and 3-5 R) housings.They utilize one piece long planets in the rear carrier. I forget where I read it, but I have heard them described as Lepelletier.
Right about the common sun gear in a Simpson. I knew that too. Silly of me. However, after studying this geartrain more, I still argue that it is a Ravigneaux or as Gears magazine calls it "Ravigneaux type." Even though it has two ring gears, they are not on independant assemblies. Therefore, any action on one of the planets in contact with the ring gear will cause a like reaction of the other planet on the same axle. The two planets act as "long" and the two idlers as "short" planets.
@56arbee Hi, that is a great argument, I agree with the "Ravigneaux type" description even though the planet gears are not physically connected as in a traditional Ravigneaux gear set. If that is the case, then you could also argue that this transmission is actually a "Lepelletier Type" design which uses a simple input planetary gear set to drive a Ravigneaux planetary output gear set.
@56arbee That is what I thought at first, but a Simpson gear set has common sun gears and these are separate sun gears. It appears to be two totally independent gear sets with a common carrier housing. The two ring gears can be removed seperately.
Hi, good observation, however; this is not a Ravigneaux gear set. The common planet carrier does not have long and short planet gears as a Ravigneaux does. This planet carrier has two totally separate sets of planet gears that are not connected to each other. The bottom gear set has an idler gear set to reverse the direction.
Correct me if I'm wrong, but at 02:12 you say that the rear planetary gearset has two ring gears. This being a Ravigneaux gearset, I believe it has only one effective ring gear, that being meshed with the long planet gears. The short planet gears mesh only with the long planet gears and the small sun gear.
Ok guys, now some body tell me how to put one n my 6 cylinder Trailblazer.
blackericdenice 1 month ago
Agreed. In fact, the ZF and the Ford 6R60 is the same design (but use separate 1234 and 3-5 R) housings.They utilize one piece long planets in the rear carrier. I forget where I read it, but I have heard them described as Lepelletier.
56arbee 4 months ago
Right about the common sun gear in a Simpson. I knew that too. Silly of me. However, after studying this geartrain more, I still argue that it is a Ravigneaux or as Gears magazine calls it "Ravigneaux type." Even though it has two ring gears, they are not on independant assemblies. Therefore, any action on one of the planets in contact with the ring gear will cause a like reaction of the other planet on the same axle. The two planets act as "long" and the two idlers as "short" planets.
56arbee 4 months ago
@56arbee Hi, that is a great argument, I agree with the "Ravigneaux type" description even though the planet gears are not physically connected as in a traditional Ravigneaux gear set. If that is the case, then you could also argue that this transmission is actually a "Lepelletier Type" design which uses a simple input planetary gear set to drive a Ravigneaux planetary output gear set.
WeberAuto 4 months ago
OK, I see. Then it's more like a Simpson with a set of reversing idler's on one set of planets?
56arbee 4 months ago
@56arbee That is what I thought at first, but a Simpson gear set has common sun gears and these are separate sun gears. It appears to be two totally independent gear sets with a common carrier housing. The two ring gears can be removed seperately.
WeberAuto 4 months ago
Hi, good observation, however; this is not a Ravigneaux gear set. The common planet carrier does not have long and short planet gears as a Ravigneaux does. This planet carrier has two totally separate sets of planet gears that are not connected to each other. The bottom gear set has an idler gear set to reverse the direction.
WeberAuto 4 months ago
Correct me if I'm wrong, but at 02:12 you say that the rear planetary gearset has two ring gears. This being a Ravigneaux gearset, I believe it has only one effective ring gear, that being meshed with the long planet gears. The short planet gears mesh only with the long planet gears and the small sun gear.
56arbee 4 months ago