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What does shifting to "L" do?

Wife has noticed a lack of power under certain merge situations and we live up a mile long 10% grade and this "lack of power" is really a lack of downshifting to a low enough gear. Nearly every automatic car I've had has had a 4-3, Sport, paddle shift, manumatic mode, etc in order to select a lower gear without mashing the pedal to the floor for a downshift.

Any downshift experiences here?

I don't have access to the manual as the van is 3 states away.
 

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Wife has noticed a lack of power under certain merge situations and we live up a mile long 10% grade and this "lack of power" is really a lack of downshifting to a low enough gear. Nearly every automatic car I've had has had a 4-3, Sport, paddle shift, manumatic mode, etc in order to select a lower gear without mashing the pedal to the floor for a downshift.

Any downshift experiences here?

I don't have access to the manual as the van is 3 states away.
Hi II Kings 9:20,

There was a number of questions regarding driving in D or L on this thread: http://www.pacificaforums.com/forum...eral-discussion/15106-driving-mode-l-d-4.html. If this thread doesn't answer your question let me know and I can investigate further for you. Also, i you're interested you can download a copy of your Owner's Manual on www.mopar.com if you are away from your vehicle.

Andrea
Chrysler Social Care Specialist
 

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Wife has noticed a lack of power under certain merge situations and we live up a mile long 10% grade and this "lack of power" is really a lack of downshifting to a low enough gear. Nearly every automatic car I've had has had a 4-3, Sport, paddle shift, manumatic mode, etc in order to select a lower gear without mashing the pedal to the floor for a downshift.

Any downshift experiences here?

I don't have access to the manual as the van is 3 states away.
Hi II Kings,

I merged your thread with the one Andrea recommended. Please review this thread and post your questions here if you still have any.
 

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Hi II Kings,

I merged your thread with the one Andrea recommended. Please review this thread and post your questions here if you still have any.
I'm not sure his Pacifica is a hybrid.. if it isn't, then I think L only keeps the transmission from shifting into any of the overdrive gears (I think gear 6 and up).
 

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Hi II Kings,

I merged your thread with the one Andrea recommended. Please review this thread and post your questions here if you still have any.
Thanks.

I'm not sure his Pacifica is a hybrid.. if it isn't, then I think L only keeps the transmission from shifting into any of the overdrive gears (I think gear 6 and up).
Sorry guys, I wasn't as clear as I should have been so I'll try again.

Yes. I don't have a hybrid, I have a Touring that is in 8th gear when I need 4 or 5 to go up my 10% mile long hill or I need a burst of power to freeway merge. I need a lower gear for acceleration not engine braking.

I just need to know if I'm doing 65 and drop to L, It's OK to do it. Older cars I had were PRNDL and in the last 20 years PRND32L. In a PRNDL I never would shift from D to L unless creeping along in the snow.

Can I go from D to L safely in the Pachy Touring while at speed? I wish it had paddles then this would not be a question.
 

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Hi II Kings 9:20,

There was a number of questions regarding driving in D or L on this thread: http://www.pacificaforums.com/forum...eral-discussion/15106-driving-mode-l-d-4.html. If this thread doesn't answer your question let me know and I can investigate further for you. Also, i you're interested you can download a copy of your Owner's Manual on www.mopar.com if you are away from your vehicle.

Andrea
Chrysler Social Care Specialist
Alrighty then, thanks a million. I will look at the online manual.
 

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Hi II Kings 9:20,

There was a number of questions regarding driving in D or L on this thread: http://www.pacificaforums.com/forum...eral-discussion/15106-driving-mode-l-d-4.html. If this thread doesn't answer your question let me know and I can investigate further for you. Also, i you're interested you can download a copy of your Owner's Manual on www.mopar.com if you are away from your vehicle.

Andrea
Chrysler Social Care Specialist
Ok I have an answer, thanks for your help. this is copied from the mopar.com website: "Using the LOW position manually downshifts the transmission to a lower gear based on vehicle speed".
 

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Hi II Kings,



I merged your thread with the one Andrea recommended. Please review this thread and post your questions here if you still have any.


Hi irpilot, this is completely off topic from the current discussion and should not have been merged. The topic of this is whether it is more efficient mpg-wise to drive in L or D mode in the hybrid. You merged how to get up a hill in the gas model.


Sent from my iPhone using Tapatalk
 

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Ok I have an answer, thanks for your help. this is copied from the mopar.com website: "Using the LOW position manually downshifts the transmission to a lower gear based on vehicle speed".
Thanks for sharing the info, this is useful to know... Like a typical guy I usually only read the manual as a last resort lol.
 

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Thanks for sharing the info, this is useful to know... Like a typical guy I usually only read the manual as a last resort lol.
Funny, I go there first but my manual is with the van in Virginia. I love forums though and sometimes you learn a lot more with additional info here.
 

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Hi irpilot, this is completely off topic from the current discussion and should not have been merged. The topic of this is whether it is more efficient mpg-wise to drive in L or D mode in the hybrid. You merged how to get up a hill in the gas model.


Sent from my iPhone using Tapatalk
Good point, my question has nothing to do with the topic in this thread. I didn't realize even what thread we were in, I'm just glad to find an answer. Already passed along info to wife for her trip across WV today.
 

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Hi irpilot, this is completely off topic from the current discussion and should not have been merged. The topic of this is whether it is more efficient mpg-wise to drive in L or D mode in the hybrid. You merged how to get up a hill in the gas model.


Sent from my iPhone using Tapatalk
Hey Vossman. You're 100% correct. I didn't notice the section yesterday when I merged. Looks like the question was answered so well done everyone. I'll pay more attention in the future when doing thread cleaning. Thanks for the heads up.
 
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The L mode works great for climbing my 10% mile long grade. it maintained 3500 RPM and had great power and throttle response in a lower gear. Not as good turning into my 25 MPH street, it seemed in too low a gear and wanted to go to 5000 RPM. Going down the same hill, L wanted to select a lower gear than I would, it wanted to go to 5000 RPM before upshifting. Paddle shifters would be great here or like my S60, a Sport mode with the option to select gears 1-8. .

Most of you know that a 10% grade means for every 100 linear feet the road drops 10ft. 7% means a 7 foot vertical drop for every 100 linear feet.
 

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This question is amusing since I've had both a 2nd gen (thus non-PHEV) Prius and a RAV4 EV. They share the same shifter with D and B modes.

In the Prius it just changed the gear ratio. Thus for short hills I'd stick in D and feather the left pedal to maximize regen while not using the brakes themselves, but for descending mountain passes I'd use B to keep load off the brakes via ICE engine braking.

In the (BEV) RAV4 EV B mode just changes regen levels, since clearly there's no changing the fixed single gear ratio in the transmission. I don't think throttle mapping is affected.

In the PacHy it sounds like throttle mapping is just shifted such that for a given pedal position not near wide open ("floored") the result is of less acceleration or more regen, depending on whether one is past the L-mode neutral position resulting in coasting. It can't just be a linear shift of the map else one could never summon full power. The ChryslerCares answer makes it sound as if the gear ratios aren't changed, even though they could be since it's a dual motor CVT setup a la the Prius's Hybrid Synergy Drive.
 

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This question is amusing since I've had both a 2nd gen (thus non-PHEV) Prius and a RAV4 EV. They share the same shifter with D and B modes.

In the Prius it just changed the gear ratio. Thus for short hills I'd stick in D and feather the left pedal to maximize regen while not using the brakes themselves, but for descending mountain passes I'd use B to keep load off the brakes via ICE engine braking.

In the (BEV) RAV4 EV B mode just changes regen levels, since clearly there's no changing the fixed single gear ratio in the transmission. I don't think throttle mapping is affected.

In the PacHy it sounds like throttle mapping is just shifted such that for a given pedal position not near wide open ("floored") the result is of less acceleration or more regen, depending on whether one is past the L-mode neutral position resulting in coasting. It can't just be a linear shift of the map else one could never summon full power. The ChryslerCares answer makes it sound as if the gear ratios aren't changed, even though they could be since it's a dual motor CVT setup a la the Prius's Hybrid Synergy Drive.
"..The ChryslerCares answer makes it sound as if the gear ratios aren't changed, even though they could be since it's a dual motor CVT setup a la the Prius's Hybrid Synergy Drive..."

Not sure I understand correctly. There is a single fixed gear ratio in the Pac Hybrid for the gas engine. No CVT. Just two electric motors called "electrically variable transmission (EVT)". A planetary gear is used to connect the gas engine, but the ratio used between the gas engine and rear wheels is fixed. I had thought the prius worked the same way. Here is a 2nd gen prius transmission video:
I would have guess the effect of your two approach was the same when you said "In the Prius it just changed the gear ratio. Thus for short hills I'd stick in D and feather the left pedal to maximize regen while not using the brakes themselves, but for descending mountain passes I'd use B to keep load off the brakes via ICE engine braking. "
 

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The video is great. The crux of it is that altering the speed or direction of MG1 rotation will change the ratio between the engine output shaft and MG2 output (hooked to the wheels). It's variable, not by the planetary gearset itself (no clutches on the planet carrier!) but because of MG1.

PacHy system is the same: Deep inside the Chrysler Pacifica hybrid system

Only differences are that MG1 is called Motor 2 and MG1 Motor 1. Also reverse is implemented as MG2 driven in reverse rather than MG1 driven forward with a fixed gas output shaft. There also seems to be a clutch on the planetary gear set that would allow for fixed Volt-style output from the gas engine when at speed. This might just be a one way clutch rather than an actuator so as to allow MG1 and MG2 both to contribute to propulsion.

Here's the verbiage about the CVT aspect via MG1 (aka Motor 2 here):

Motor 2 controls the sun gear in the planetary gear set, allowing it control gasoline engine speed and torque being transferred to the wheels with optimum efficiency.
 

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I'd like to resurrect this old thread. Any new opinions on the "D vs L" driving? I often drive in L and find it more enjoyable. When driving without a need to a complete stop I rarely have to use the brake pedal. Unfortunately, the van is not programmed to stop completely. One annoyance of the L mode- a loud clunk in the drivetrain while transitioning between acceleration and deceleration at low speeds.
 

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I much prefer driving in L mode. After driving EV's for the last 4 years, I love the stronger regen and not having to use the brakes going into turns. From my limited experience so far, the range is also much better in L mode. Reading through this thread, it sounds like there shouldn't be any issues driving in L almost exclusively, but I'm getting an extended warranty anyway so to me there is no downside.
 
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