ggzilla Posted January 15, 2012 Report Share Posted January 15, 2012 I believe "an automatically-shifted manual transmission". uses planetary gearsets, torque converters, and clutch packs. You need to read up on how they really work. Modern manual transmissions don't use planetary gears or torque converters. Quote Link to comment
Xander_42 Posted January 15, 2012 Report Share Posted January 15, 2012 All the new high peformance cars are automatics. Specifically, an automatically-shifted manual transmission. Like Ferrari, BMW, Porsche and almost all the others. So even they prefer manuals. Nope, Mostly what these manufacturers are using is dual clutch transmissions(DCTs). While DCTs are similar to automated manuals, they are not the same. A DCT has two wet clutches rather than one dry clutch, and it is basically two separate three speed manuals in the same case. Gears 1,3,5 are in one trans, and gears 2,4,6 are in the other. This allows the transmission to select the next gear up or down in the other transmission (not literal transmission, but effectively they are separate). This allows the car to be in the next gear, so all that needs to happen is one clutch disengages and the other engages. These systems are often accompanied by flappy paddles, but they can also be fully automated. But complete manual control would be way too difficult for normal drivers. An automated manual is just what it sound like a normal standard (lol) transmission. With constant mesh gears, synchros, and a single dry clutch. No planetaries, no clutch packs, no band clamps, and no torque converters. Both the shifting and the clutching are controlled by the car, not the driver. This allows for the ease of an auto, with the efficiency of a manual. (Talked to a friend recently that drove an E46 M3 with an automated manual, he said it was very strange, because you knew what the car was doing, and felt like you should be a part of it, but you weren't). Edit: with a little research, you were also right. BMW, Porsche, Ferrari, etc. have made the move to DCTs, but for a couple years before that, they were also using automated manuals. Quote Link to comment
Z-train Posted January 15, 2012 Report Share Posted January 15, 2012 Comparing modern boxes to 60's era Datsun ones?Come on guys.Staying IN the time frame,and if you don't mind shifting,the stick box is the best. Quote Link to comment
ggzilla Posted January 15, 2012 Report Share Posted January 15, 2012 1960s/1970s manuals are better than automatics for the same reason the new manual-based transmissions are better than automatic-based transmissions. Core principles have not changed. 1 Quote Link to comment
Xander_42 Posted January 16, 2012 Report Share Posted January 16, 2012 1960s/1970s manuals are better than automatics for the same reason the new manual-based transmissions are better than automatic-based transmissions. Core principles have not changed. Well said. Quote Link to comment
RedBanner Posted January 16, 2012 Report Share Posted January 16, 2012 Im so glad I have the choice, its not that shifting has become to combersome, but every bow and then a nice cruise is realy amplified by an auto gearbox. I kinda want a bench seat too. Quote Link to comment
Z-train Posted January 16, 2012 Report Share Posted January 16, 2012 I kinda want a bench seat too. Tell her to sit on her own side of the truck...... Quote Link to comment
RedBanner Posted January 16, 2012 Report Share Posted January 16, 2012 Tell her to sit on her own side of the truck...... half the fun of an auto is the "bench seat" Quote Link to comment
Son_of_a_Datsun_Guy Posted January 16, 2012 Report Share Posted January 16, 2012 pfft bench seat... I just make people crouch over the transmission tunnel if they want a ride Quote Link to comment
DanielC Posted January 16, 2012 Report Share Posted January 16, 2012 I stand corrected about manually shifted automatics. Back to the original post. It is in reference to a 520, unknown year. Assuming "bolt in" engine swaps, the transmission choices are 3 speed torque converter, band and clutch pack automatic, four and five speed dry clutch syncro shifted manual. If driven the same way, the five speed would potentially be the best choice for gas mileage. No torque converter slippage, no oil pump losses from the automatic. Additionally, the extra gear with the five speed should make it possible to keep the engine closer to the most efficient operating RPM. A manual transmission also has the possibility of down hill coasting, with the engine off. Not recommended with power brakes, or power steering, but if the old truck or car has manual steering, and brakes, a possibility. Quote Link to comment
RedBanner Posted January 16, 2012 Report Share Posted January 16, 2012 Yeah well, some girls dont like leaning over a trans tunnel to lay in your lap, at least the classy girls ive dated :lol: Quote Link to comment
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