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Sedans Lincoln LS Lincoln LS Transmission Problems
179 messages, Last post on Nov 25, 2009 at 11:46 AM
You are in the Lincoln LS Forum. Your Hosts are pat & karens
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Replying to: akirby (Sep 23, 2009 5:39 am)
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Replying to: Mr_Shiftright (Sep 23, 2009 6:36 am)
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Replying to: akirby (Sep 23, 2009 7:17 am)
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Replying to: Mr_Shiftright (Sep 23, 2009 7:55 am) There is room on the V6 LS but they didn't want to have 2 different versions of the transmission and 2 different entries in the owner's manual, service guide, etc.
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Replying to: akirby (Sep 23, 2009 8:02 am) I think the real reason is that manufacturers are moving to "sealed for life" components. We may even see the sealed engine pretty soon. |
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Replying to: akirby (Sep 21, 2009 5:30 am) I have reposted the issue here: I noticed about 3 years ago shortly after purchasing the car in a private sale that the transmission would occasionally slip (more so on cold days) until it would warm to operating temperature. But, I could get it to slip even after it warmed up by coming to a stop very quickly & then accelerate. It would also "buck" a little after coming to a complete stop (felt like a bump as if someone just tapped my rear bumper). I had the transmission fluid changed shortly afterward at a Ford dealership. This did not make any improvement. This went on for 3.5 years until the transmission stopped working this past week (not working R, D5, D4 ~ 3, 2 & 1 all work. What always confused me is that there are no scan codes or transmission errors. It behaved as if it was low on tranny fluid. What is the answer without spending 3k to take it apart to find out?! |
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Replying to: lsjunk (Sep 25, 2009 2:36 pm) |
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Replying to: lsjunk (Sep 25, 2009 2:36 pm) The symptoms are somewhat odd given how the transmission is designed (see below). For 1, 2, 3 to work requires that the front 2-speed gear box actuator is functioning and that the middle 3-speed gear box is shifting between 3.25:1 and 1.53:1. If the 3-speed can't switch to gear-3 but remains stuck in gear-2 (1.53:1) then D4 will be 3rd but D5 should shift to an unused gear ratio of 1.1475:1 which would be noticably faster than D4. Reverse is a third gear box at the end with its own actuator which doesn't seem to be functioning. It may be that the actuator pump isn't generating enough pressure to operate the 3-speed gear box fully (it can switch between gear-1 and gear-2 but not to gear-3) or to operate the reverse actuator. Good luck.... Transmission description by the design engineer from an old forum page: #604 of 677: LS *is* a 5 speed transmission (mkovalsk) Tue 28 Dec '99 (05:58 AM) The LS is a 5 speed transmission. It is in thesame "family" as the Explorer 5 speed. The new transmission, called the 5R55N, was designed from the Explorer trans, but 95% of the parts are new. The torque converter only locks in 4th and 5th, except with the sport package. In the sport it can also lock in 3rd gear when shifting manually. Second gear is not achieved by locking the torque converter in first gear. It is achieved by overdriving first gear. Fifth gear is not created by locking the torque converter in fourth gear. It is overdriven fourth gear. Think of this as two transmissions in one case. In front is a two speed trans, with ratios of 1:1 and 0.75:1. This is called the overdrive unit. Behind this is a three speed transmission. In first gear the overdrive unit is at 1:1 ratio. The rear gearset is at 3.25:1. This gives an overall ratio of 3.25:1. For second gear, the overdrive shifts to 0.75:1 and the rear unit stays at 3.25:1. 3.25*0.75 = 2.44:1. For third gear the overdrive shifts back to 1:1 and the rear gearset shifts to 1.53:1. 1*1.53=1.53, which is the third gear ratio. For fourth gear, the rear set shifts to 1:1 ratio, and the front stays at 1:1. For fifth, the overdrive shifts to 0.75:1 and the rear stays at 1:1.. 0.75*1=0.75, which is fifth, or overdrive ratio. I don't know what else to call this besides a five speed. There are five distinct ratios, plus converter lock. |
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minority was drawn to the Lincoln LS because it was originally offered with a transmission that doesn't have these problems. It's called a manual. It was 48 years or so between the '51 and '00 Lincolns that had manual transmissions. I'm guessing it'll be at least 48 before there's another one.
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Replying to: cdnpinhead (Sep 26, 2009 4:34 pm) 
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