[vedder012]

Hey guy, searched for this but didn't quite find my exact problem...

I got an 06 automatic CC, 51K, recently been having an issue with the transmission. Sometimes when i come to a hard stop (im not slamming on my brakes) at a stop sign or red light or slow down making a coasting turn and i hit the gas again the RPM shoot up and im not moving anywhere then it will catch and jerk the truck. The thing is, it doesn't happen every time i stop or slow down.

Took it to the dealer and they couldn't replicate so they wanted me to leave it there for a few days. right now i dont have time for that.

The dealer did check the fluid, not contaminated with coolant...

Any idea what the hell would be causing this?

 

[nitricacid]

Welcome to the club...Same exact problem with mine 5sp auto. 08 4x4se.

Mine started after my last flush/ at 55k. Im at 57k. I better get to the stealership fast...

Please keep us informed if u get dealership to fix

 

[77-830]

My '06 KC does the same thing. Started to be noticeable around 36K. Had the dealer check it and the response was no SES light, no problem, it's normal. Now have 45K, no worse yet. I've had 200K on trannys that felt better than this.

 

[colin123]

its because the tranny has down shifted to help you slow down with engine braking so once you touch the gas the RPMs will jump up before it shifts to a higher gear. its normal.

 

[atroader]

To be on the safe side, check your fluid level both hot and cold.

On my new truck, it was actually just below the fill mark when warm... so even worse when cold. I was getting an occasional slip at take-off as if I had shifted into neutral, given slight gas then put back into gear. Once the service dept I worked with added only a cup of fluid, I have not had the symptom return.

If your fluid is borderline, and the fluid in your pan has not settled and you gas it again, there's a chance you've sucked air. Just be sure not to overfill!!! (only allow filling to the max line when it is HOT HOT, so fully expanded).

 

[vedder012]

its because the tranny has down shifted to help you slow down with engine braking so once you touch the gas the RPMs will jump up before it shifts to a higher gear. its normal.

So your saying this is normal for my truck to jerk pretty hard at takeoff...ive had this truck now for 2 years and this just started happening back in december....something tells me this is not normal.


It feels almost that its not downshifting fast enough when im slowing down.

 

[77-830]

So your saying this is normal for my truck to jerk pretty hard at takeoff...ive had this truck now for 2 years and this just started happening back in december....something tells me this is not normal.


It feels almost that its not downshifting fast enough when im slowing down.

Yep, that's exactly what I said. I've had the truck since new, never did it before, so that tells me that something has changed. I'm not pulling a trailer or anything else that should be causing excelerated wear. If I can come to a stop long enough to allow it to shift to 1st, no problem at all. But if it's what I call "slow and go" driving it sure seems like it's slow to select a gear or is between gears and you get a harsh/jerky engagement when you try to accelerate again. It doesn't feel as if there is a delay in upshifting, if anything the delay seems to be from downshifting. And my fluid levels are fine and it is running Matic S; did do a drain and fill and it made no difference at all. I've never had an automatic do that before and I've had some that were pretty beat, lol.

 

[vedder012]

idk, sometimes its a slight jerk witch i can see that might be normal...but i did have 2 occurrences in the last week or two that were def not "normal"...

I was driving down the highway at about 60 and a deer jumped out in front of me some i stopped pretty hard...when i went to hit the gas the truck acted like it was in neutral. RPM went up to about 3k and i wasnt moving.... took my foot off the gas and hit it again off i went after a jerk...

Another instance was i was cruising again around 60 and got in a turning lane...stopped...and waited till i could turn (due to oncoming traffic), i was turning left crossing traffic, and hit the gas....again the truck just coasted a bit while the RPM's were at about 3k-4k..almost was hit by an oncoming car because my truck wouldnt move...took my foot off the gas, hit it again and it jerked pretty good and i was golden...

Now this has only happened a few time at this extreme but this is NOT NORMAL...

I would agree with you as there is def a delay in downshifting...like i said in my previous post...it acts like its not shifting down fast enough.

 

[colin123]

So your saying this is normal for my truck to jerk pretty hard at takeoff...ive had this truck now for 2 years and this just started happening back in december....something tells me this is not normal.


It feels almost that its not downshifting fast enough when im slowing down.

if you said this was happening regularly off dead stops then i'd say no its not normal but every situation your saying involves slowing down not coming to a stop and then hitting the gas followed by rpm jump then jerk. the jerk is it shifting into the higher gear. this is a smart tranny and changes how it shifts for what it thinks is best for your driving style. try resetting your ecu and erasing the memory then it will be back to how it was brand new. you wonder why the dealer can't "replicate it" is because they either A have a completely different driving habits than you so it doesn't happen for them or b they have driven enough newer nissans in their career and know its normal and in tern don't understand what your complaining about. my z was the same way (same tranny and system) anytime i've reset the ecu for some reason or another (sometimes having the bat unhooked for whatever reason for a long time) the shifting drastically changes then goes back to doing the same things. its downshifting to engine brake but since its not a manual and the engine and tranny aren't hard connected in driveline the force in the torque converter needed to engine brake and the forced needed to drive are different. to engine brake the fluids need to move very slow to drive you need them moving much faster. it down shifts and without your foot on the gas the motor wants to slow down so the fluid intern slows down but then you touch the gas and the motor speeds up then after a short time the fluid speeds up and the computer sees load from the tranny side of it all and compares that to engine speed and sees it needs to go to the next higher gear so it does, then jerk. if it wasn't down shifting then instead when you would hit the gas to start going again it would bog down horribly sitting at one rpm the whole time either say at 2.5 or 3 grand with the torque converter unlocked forever as it bogs trying to gain speed or it would down shift and rpms would rise even higher. find someone that had a tranny failure that was not due to the rad and was not from them doing something really stupid and maybe that started like this or post up here if it ever gets noticeably worse to the point of slipping from dead stop. tranny failure with slipping doesn't happen like that, it happens under heavy load ie dead stop or punching it in traffic or making a pass on the highway. they also don't just jerk. the slipping happens the same as a slipping clutch or with shutters as its the clutch packs are trying to grab.

 

[edubble]

this used to happen with mine, changed transmission fluid and it stopped.

 

[slipnslide]

Welcome to the club...Mine started after my last flush/ at 55k. Im at 57k. I better get to the stealership fast...

Just curious - did you have it done at the dealership? If so did they do the 'passive flush' (I'll call it) where they fill as their running/draining?

 

[vedder012]

if you said this was happening regularly off dead stops then i'd say no its not normal but every situation your saying involves slowing down not coming to a stop and then hitting the gas followed by rpm jump then jerk..

I didnt say im just slowing down every time..my last two examples from my previous post, i came to a dead stop. but ive had it happen when slowing and after a dead stop.

 

[colin123]

sorry i missed that dead stop part, but if your fluid is good (you said dealer tested it) your fluid level is good, your not a 16 year old kid doing neutral bombs, and it hasn't started slipping consistently take off after take off or when going to pass someone on the highway then it honestly probably is absolutely nothing but maybe a fluke of a hiccup that now has you freaking out thinking that every little thing is the feeling of your tranny falling out of your truck. you haven't be able to get the dealer to replicate it. so the only real thing you can do if everything else is good is reset your ecu to erase the memory to see if and how anything changes. the tranny and engine use these algorithms made by compiling saved data from you driving to figure things out like how each individual cyl burns fuel or how you drive and how it should shift for that. plenty of people have complained that there tranny as seemed off or their truck sluggish then the do a reset and start from factory say it feels like a whole new truck. i do resets all the time, since it makes these algorithms off compiled data the longer you go between resets the more data there is so changes that are made to something like changing fuel octane or towing a boat don't make as much difference in how the computers what to do things cause over the long run these changes become small compared to all the data so semi frequent resets keeps it fresh and keeps the truck as close to how it was the day your bought it as it can be. we could get every member on here together and all drive each others trucks and no ones would shift the same. i've test driven newer ones i've driven friends trucks and xterras and everyone is unique to the driver. so like i said unless it gets worse to the point that the dealer can replicate it and if your levels are good there is really nothing else you can do

 

[vedder012]

hey Colin thanks for explaining all this, ill try resetting the ecu, after work today, is there any other way to this besides disconnecting the battery?

do you know how long it takes for the ecu to learn your driving style, or is it ongoing? i ask this because the dealer had my truck for a week or so back in early December. they replaced the left head and some other parts due to an oil leak. Im sure they test drove it after the fix...

and no im not some 16 year old kid doing neutral bombs...lol

 

[colin123]

by disconnecting the batt it can take up to 24 hours for all the memory to be erased, i've always seemed to get it fine by disconnecting the batt after work on like a friday and leaving it as long as i could before having to go do something sat afternoon. with my z i found out from a tech that there was a way to do it really quick with a few nicely timed turns of the key and gas pedal working but forgot it and couldn't find it on any forums but i found it on a titan forum. really easy a quick way to reset the ecu and also the procedure for re calibrating your throttle body is on there too How to:ECU Reset,Throttle & Accelerator Position Learning - Nissan Titan Forum

 

[colin123]

as far as how fast it learns when the memory is fresh after a reset it tends to pick up on things quick as time goes on for me i notice it starts to base alot on highway driving and not city acceleration and to me i feel it becomes sluggish so i do resets to prevent that. i actually went out of town for a little while and left my truck with a friend who i told could drive it while i was gone and when i got back i could tell the difference in how the truck wanted to shift from normal since it was learning my friends driving and adjusting to that. hope this helps ya and hopefully a quick reset gets her back to the way you want it.

 

[nitricacid]

Just curious - did you have it done at the dealership? If so did they do the 'passive flush' (I'll call it) where they fill as their running/draining?

I do myself. Once at 25k and one 55k

 

[fast2gnt]

there is a tsb on a transmission controller reflash i think it covers 05-08. I had mine reflashed and it seems to have better shift points now.