2015 ram 3500 jerking hard

[steadypraying42]

It happens ever so often but today was a biggie. I was rolling to a red light foot off of the pedal and then the light turned green so I push on the gas to continue driving, then it happens. My truck jerks back and forward as if my engine just fell out or something. Truck only has 10k miles on it now. It's like the transmission is slipping hard. Anyone know what this is all about?

[goducks10]

rjstractor wrote:

rhagfo wrote:
The OP real issue is he is pressing on the Gas, my Ram has a Throttle!

Diesel engines don't have throttles. Maybe "accelerator" is the correct term? 😉

I guess you can call it either.
http://www.genosgarage.com/product/dodge-cummins-throttle-position-sensor-mopar-53034160/engine-sens...
http://www.genosgarage.com/product/ram-mopar-accelerator-petal-throttle-position-sensor-68043161/eng...

[rjstractor]

rhagfo wrote:
The OP real issue is he is pressing on the Gas, my Ram has a Throttle!

Diesel engines don't have throttles. Maybe "accelerator" is the correct term? 😉

[carringb]

ShinerBock wrote:
I am going to say it is due to a faulty TPS(Throttle Position Sensor). Bucking and Jerking while accelerating is one of the signs of a TPS going bad.

This was going to be my suggestion too. Had this happen to one of my trucks.

[ShinerBock]

I am going to say it is due to a faulty TPS(Throttle Position Sensor). Bucking and Jerking while accelerating is one of the signs of a TPS going bad.

[Anson]

Take your truck in and get it looked at by the computer, Im guessing it is your injectors

[Cummins12V98]

"The OP real issue is he is pressing on the Gas, my Ram has a Throttle! "

HA, yea kinda like "gas mileage" with a diesel.

[Cummins12V98]

FishOnOne wrote:

Cummins12V98 wrote:
It is NOT a problem. You are at that moment where it drops into 1st that in reality is like having a granny low then immediately it hits 2nd so it causes a jerking motion the harder you are pushing the go pedal the more noticeable it is. It's not slipping and the engine is not falling out.

These Aisin's act a lot like a "built" trans, that is a good thing.

Really....

OP,
I would take the truck back to the dealer!

I said that. There is nothing wrong tho.

[blofgren]

FishOnOne wrote:

Cummins12V98 wrote:
It is NOT a problem. You are at that moment where it drops into 1st that in reality is like having a granny low then immediately it hits 2nd so it causes a jerking motion the harder you are pushing the go pedal the more noticeable it is. It's not slipping and the engine is not falling out.

These Aisin's act a lot like a "built" trans, that is a good thing.

Really....

OP,
I would take the truck back to the dealer!

I would too. The 2012 F-150 I drive for work was having some really harsh shifting and it was corrected with a reflash. You don't want to risk damage to anything and at least it will be documented as an issue which could work in your favor if it continues later on.

[Grit_dog]

drittal wrote:
The 66RFE ram uses behind both Hemi engines in the HD line has the same gearing as the 68RFE behind the Cummins. The gearing is numerically lower than the ratios found in both the Ford and Chevy gas transmissions. The Ram would benifit from higher numerical differential gearing to compensate, but 4.10 is the highest available unless you go to chassis cab. 4.44 would be sweet.

??
This makes no sense.

[Grit_dog]

whjco wrote:
Mine does the same thing and has done it since it was new. I think it's part of the emission control. If I suddenly take my foot off of the go pedal and then suddenly mash on it, it will always take a couple of seconds before it will respond. I don't think there's anything wrong with your truck.

No that's just the crappy torque management and deal pedal issue.

[larry_barnhart]

I recall talking to several new Ram owners that had a very hard down shift on the trannie after the 4 speed model. A reflash made a smoother shift I was told.

chevman

[FishOnOne]

Cummins12V98 wrote:
It is NOT a problem. You are at that moment where it drops into 1st that in reality is like having a granny low then immediately it hits 2nd so it causes a jerking motion the harder you are pushing the go pedal the more noticeable it is. It's not slipping and the engine is not falling out.

These Aisin's act a lot like a "built" trans, that is a good thing.

Really....

OP,
I would take the truck back to the dealer!

[whjco]

Mine does the same thing and has done it since it was new. I think it's part of the emission control. If I suddenly take my foot off of the go pedal and then suddenly mash on it, it will always take a couple of seconds before it will respond. I don't think there's anything wrong with your truck.

[rhagfo]

Cummins12V98 wrote:

Bigfoot affair wrote:
steadypraying426 It happens ever so often but today was a biggie. I was rolling to a red light foot off of the pedal and then the light turned green so I push on the gas to continue driving, then it happens. My truck jerks back and forward as if my engine just fell out or something. Truck only has 10k miles on it now. It's like the transmission is slipping hard. Anyone know what this is all about?

Cummins12V98 wrote:
It is NOT a problem. You are at that moment where it drops into 1st that in reality is like having a granny low then immediately it hits 2nd so it causes a jerking motion the harder you are pushing the go pedal the more noticeable it is. It's not slipping and the engine is not falling out.

These Aisin's act a lot like a "built" trans, that is a good thing.

Really, a good thing? OP, I suggest you take it in and have the dealer look at it.

The Aisin trans is not your typical slush box trans that has slippery smooth shifts. They are firm and the op had a situation that can happen when there is such a difference in ratios between 1st and second. Like I said with the Aisin in first it's like Granny low with a stick shift.

Op take it to the dealer if you want, please let us know what they say.

The OP real issue is he is pressing on the Gas, my Ram has a Throttle!

[Cummins12V98]

Bigfoot affair wrote:
steadypraying426 It happens ever so often but today was a biggie. I was rolling to a red light foot off of the pedal and then the light turned green so I push on the gas to continue driving, then it happens. My truck jerks back and forward as if my engine just fell out or something. Truck only has 10k miles on it now. It's like the transmission is slipping hard. Anyone know what this is all about?

Cummins12V98 wrote:
It is NOT a problem. You are at that moment where it drops into 1st that in reality is like having a granny low then immediately it hits 2nd so it causes a jerking motion the harder you are pushing the go pedal the more noticeable it is. It's not slipping and the engine is not falling out.

These Aisin's act a lot like a "built" trans, that is a good thing.

Really, a good thing? OP, I suggest you take it in and have the dealer look at it.

The Aisin trans is not your typical slush box trans that has slippery smooth shifts. They are firm and the op had a situation that can happen when there is such a difference in ratios between 1st and second. Like I said with the Aisin in first it's like Granny low with a stick shift.

Op take it to the dealer if you want, please let us know what they say.