I recently bought an '11 Lc at 166,000 miles with great service history. The last transmission service/flush was at 140k at a dealership.
At lower speeds, I am noticing a significant forward momentum shift a second or so after letting off the gas, with a correlating spike and then drop in the tach of around 500-700 rpm (it typically spikes from 1400 to 2000 or so, then immediately back down to 1000ish.) The momentum shift is quite noticeable (to me, at least) and lurches the truck nearly as much as a physical tap on the brakes would. In S drive mode, the momentum shift doesn't seem to happen, so I've more or less honed in on the AT as the cause of the lurching.
There's part of me that thinks this might just be the nature of the 6-speed transmission that I'm still unfamiliar with (I've only driven around 2,000 miles so far.) However, the timing and significance of the shift feels stronger and more sudden than I would imagine any type of automatic engine braking/brake assist system would feel.
Any insight will be hugely appreciated!
At lower speeds, I am noticing a significant forward momentum shift a second or so after letting off the gas, with a correlating spike and then drop in the tach of around 500-700 rpm (it typically spikes from 1400 to 2000 or so, then immediately back down to 1000ish.) The momentum shift is quite noticeable (to me, at least) and lurches the truck nearly as much as a physical tap on the brakes would. In S drive mode, the momentum shift doesn't seem to happen, so I've more or less honed in on the AT as the cause of the lurching.
There's part of me that thinks this might just be the nature of the 6-speed transmission that I'm still unfamiliar with (I've only driven around 2,000 miles so far.) However, the timing and significance of the shift feels stronger and more sudden than I would imagine any type of automatic engine braking/brake assist system would feel.
Any insight will be hugely appreciated!