Transmission Delay!

A forum for the legendary Nissan Pathfinder and Infiniti QX4.
Jab215
Posts: 36
Joined: Sun Jun 27, 2010 6:38 pm
Car: 2003 Nissan Pathfinder LE

Post

The other day i was a bit impatient and was reversing the car after being parked in the cold, then stopped and shifted to drive but before the transmission engaged drive i was already on the gas and the car jerked when it finally did (not the first time ive done this). now it seems like when i press the gas from a stop theres some slight delay, like the clutch cant engage quick enough when i press the gas pedal. if i stop on a hill or take my foot off the gas and put it back on while on a hill the delay is not there at all. im looking for a reason and a fix please. :)


Pathfound49
Posts: 146
Joined: Fri Dec 25, 2009 11:10 am
Car: 2003 Nissan Pathfinder
2005 Volvo XC90
1999 Volvo S70
Location: Wind Gap, PA

Post

So what you're saying is you are trying to destroy your vehicle. Then want a reason why you are trying?

Jab215
Posts: 36
Joined: Sun Jun 27, 2010 6:38 pm
Car: 2003 Nissan Pathfinder LE

Post

No im not tryiong to destroy it. Ive been in a hurry before. its the second time this has happened cause i didnt want to wait the 3 seconds that it takes from me selecting dirve to it actually going into drive. If u dont have an answer as to what is wrong with the transmission, dont comment

ARKQX33V6
Posts: 705
Joined: Fri Aug 06, 2010 3:35 pm

Post

Time, time to stop time to think, it takes time to:signal the transmission via the selector, then through wires to the solenoid and then through hydraulic pressures to finally engage. All this just doesn't happen at once, although the transmission does its best as a hydraulic, mechanical device with electric solenoids for primary action followed up with hydraulic action placed on spinning plates and friction material.

Your robust actions can cause excessive hydraulic action to force material into the hydraulic parts of a solenoid and cause delay. Remember that a solenoid is only the primary mover, the electric part and that acts on pressure of the hydraulics. If the car is cold the idle is fast to improve warm up time but the transmission oil pressures are higher than normal and cold. Cold oil is more dense, take a bit more to flow. The transmission oil will take 2x as long to warm up as the coolant in the engine.

When cold treat the vehicle like you like it, that you want to keep it. Transmission work on vehicles is expensive, most mechanics know not, but a good transmission guy is good at mechanics, electrical and hydraulics and you will have to pay his price.

If you can't wait 3 seconds to shift from P to R to D when cold, try driving a standard shift because you will have to learn to handle a clutch.

Slow down, the world will wait for you.

BTW if further problems are showing up there may be particles hanging in the fluid of the transmission and a fluid change usually gets them out. Check your internal filter.

tbsbiker2
Posts: 67
Joined: Mon Mar 09, 2009 5:36 am
Car: 2001 SE Pathfinder

Post

Perhaps (and it's no insult) your driving habits which
Are abusive on the transmission have put it into
Failsafe mode. In any event waiting a couple of seconds
Beats waiting several days and spending a few grand on a transmission.

So, if your overdrive light is flashing then you have an issue. If not
Check (or have someone) your trans fluid and start there. The descriptions your providing Would most likely lead to a damaged trans. So don't take offense
To Comments like those already posted. If you are looking to be arguementative
Then this would probably be the most help you will find here. I'm kinda new here myself but know enough that i wouldn't get much assistance if I posted an example that said something like "I've never had time to change or check my engine oil but am wondering what would create loud engine noises". The folks here are really really helpful so good luck, hope you get it resolved and i haven't misread your comments.

Pathfound49
Posts: 146
Joined: Fri Dec 25, 2009 11:10 am
Car: 2003 Nissan Pathfinder
2005 Volvo XC90
1999 Volvo S70
Location: Wind Gap, PA

Post

Thanks tbsbiker2. That's what I wanted to say. It just came out wrong.

tbsbiker2
Posts: 67
Joined: Mon Mar 09, 2009 5:36 am
Car: 2001 SE Pathfinder

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I'm just one of the many here that have the benefit from learning more about my truck and fixing it myself from the posters here kind enough to put all the time and effort into
providing such great info.

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Towncivilian
Posts: 4868
Joined: Sun May 23, 2010 10:21 am
Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T
Location: Florida, USA
Contact:

Post

I've accidentally done the same thing as the OP several times. I now always come to a complete stop before shifting into another gear and wait a few seconds after that to let my foot off the brake to avoid this bad "delay".

yeldogt
Posts: 426
Joined: Sun Jan 23, 2011 8:23 am
Car: 02 Pathfinder 4X LE (X2)

Post

When a car is new and everything is tight the shock of doing this is less -- and the pressures are higher in the transmission.

The system has a built in delay that when new is normally almost enough to unless you are really go fast in reverse.

When the car gets older and the parts have a little more slop in them you can do some damage - especially when the transmission has lower pressure - normally one part takes the whole hit and then the you get a momentary slip on acceleration.

Not good -- take you time.

Jab215
Posts: 36
Joined: Sun Jun 27, 2010 6:38 pm
Car: 2003 Nissan Pathfinder LE

Post

Just an update. transmission decided to fix itself. no lie, it somehow did begin working as it was before my incident. :woot:

User avatar
Towncivilian
Posts: 4868
Joined: Sun May 23, 2010 10:21 am
Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T
Location: Florida, USA
Contact:

Post

Well, just cause you don't experience the problem anymore doesn't always mean it went away. How is your transmission fluid condition and level? Let us know what the color is and if it smells burnt or feels gritty.

Jab215
Posts: 36
Joined: Sun Jun 27, 2010 6:38 pm
Car: 2003 Nissan Pathfinder LE

Post

transmisson fluid level is fine and the fluid itself is not even 2 months old

User avatar
Towncivilian
Posts: 4868
Joined: Sun May 23, 2010 10:21 am
Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T
Location: Florida, USA
Contact:

Post

Hmm, you're probably ok then. Just make sure that the shift knob is always fully seated in your selected gear and don't take off too quickly after shifting and you should avoid this issue in the future. And make sure to keep up with transmission fluid maintenance and you should have a long lasting transmission.


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