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Old 09-02-2021, 04:38 PM   #1
jp2code
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Default Automatic Transmission gear slip

My ex bought a 2003 Xterra.

When accelerating, it shifts into 2nd gear fine. As the engine accelerates in 2nd gear, it feels like the gear slips out, causing a brief increase in RPM before catching in 3rd, but it bogs down a little in 3rd because the vehicle isn't moving fast enough.

I know the Hardbody and Xterra parts are very similar, so I'm hoping someone has experienced this.
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Old 09-02-2021, 06:46 PM   #2
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ive had this expierence before on a different car. turned out to be a few different things


1: the trans was kinda programmed to do that to make it a softer feeling shift. its a slow gear change and for some reason the throttle is allowed to stay open between shifts and causes that "slip" feeling at the top of one gear to the next. note the car im talking about has a dbw setup which is why im suprised its allowed to rev the motor between gears when in "Drive" youd think the programmers would limit throttle or program itout.



2: i had a fledgling pressure sensor switch. i replaced the 2-3-4 gear pressure switches and this helped "firm up" the shift a little or at least make them feel slightly more like the automatic transmission shift we all have had for the last 35yrs. not sluggish between gears, but not like getting rear-ended by a freight train either. I think the sensor that said "its high enough pressure, go to gear 3" and the gear 3 sensor that says "is the pressure high enough for us to engage 3rd?" werent agreeing. so that rev-up caused a slight enough pressure increase to kick both switches into their expected window.
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Old 09-02-2021, 08:51 PM   #3
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Flush the trans? ...to start with. See what this fixes, if anything.
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Quote:
Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 09-03-2021, 12:31 AM   #4
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Originally, I was thinking that the torque converter was failing. But it only happens midway through 2nd gear. And it feels like the gear has slipped out of the driveline path. The engine spins up for a brief moment after 2nd gear fails, and 3rd gear engages at a low RPM, causing the engine to struggle.

I did mention getting a basic transmission flush to my ex, but she hasn't had time for that yet.

It also rides on 4 bald tires, needs all new belts, rewired TPS sensor, and a windshield.
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Old 09-04-2021, 11:53 AM   #5
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Quote:
Originally Posted by jp2code View Post
I did mention getting a basic transmission flush to my ex, but she hasn't had time for that yet.
And you have time for your ex?

If anything, say "go to a transmission shop." You don't need the stress or liability of getting involved.
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Old 09-04-2021, 01:47 PM   #6
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Quote:
Originally Posted by LugNut1990 View Post
And you have time for your ex?

If anything, say "go to a transmission shop." You don't need the stress or liability of getting involved.
That's my son's mom. I will always be involved.
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Old 09-04-2021, 07:44 PM   #7
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Quote:
Originally Posted by jp2code View Post
I did mention getting a basic transmission flush to my ex, but she hasn't had time for that yet.

It also rides on 4 bald tires, needs all new belts, rewired TPS sensor, and a windshield.
you forgot this, after the word "windshield", above:


This is on you? (maybe I don't understand...) So, you have time to fix all of that? Lighten the load and delegate... most don't need appts, but it would be smart to call ahead. ...even if you're calling for her.

...and going down another rabbit hole... Time to trade it in on something newer and more reliable?!?!
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Quote:
Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.

Last edited by 89'HBV6; 09-04-2021 at 08:07 PM.
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Old 09-04-2021, 09:13 PM   #8
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God almighty. She just bought this. She isn't going to sell it to buy something new.

Right now, we are looking at the unknowns. Tires and belts are known fixes. Windshield is a known PUT IT OFF.

I'm just trying to see if anyone has experience with the TRANSMISSION ISSUE.
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