SPONSORED LINKS

Transmission delay in shifting problem

Tiny
DAYEE4LIFE
  • MEMBER
  • 2001 ISUZU NPR
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
It seems like that there is a delay in shifting from 3-4 and/or 4-5. When I keep on pressing the accelerator pedal then it takes a little long, but if I go a little easy (which is abnormal) then the shifting is fine. Other wise the shifting of the rest of the gears is normal.
SPONSORED LINKS
Friday, April 3rd, 2020 AT 7:31 AM

18 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

The harder you accelerate, the longer it will take for the shifts. The RPM's will increase higher before shifting. Is that what is happening? By any chance, is the check engine light staying on when the engine is running?

Joe
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Friday, April 3rd, 2020 AT 11:13 AM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
I didn't notice the rpm. There is no check engine light.
Was this
answer
helpful?
Yes
No
Friday, April 3rd, 2020 AT 5:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Check to see if the RPM's are simply increasing because you are accelerating faster. I have a feeling that is what is happening. I am basing that on the idea that you mentioned it shifts normally if you are easy on the throttle.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Friday, April 3rd, 2020 AT 6:14 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Okay. Let me check and get back to you.
Thank you Joe.
Was this
answer
helpful?
Yes
No
Monday, April 6th, 2020 AT 9:26 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

You are very welcome. Let me know what you find or if you have other questions.

Take care and I hope you are well.

Joe
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, April 6th, 2020 AT 9:34 AM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Unfortunately this truck doesn't have a rpm gauge!
Was this
answer
helpful?
Yes
No
Tuesday, April 7th, 2020 AT 2:57 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

No problem. Can you hear the engine increasing in speed as the vehicle does the same?

Joe
Was this
answer
helpful?
Yes
No
Tuesday, April 7th, 2020 AT 6:22 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Good morning Joe. I did, but no it doesn't increase in speed!
Was this
answer
helpful?
Yes
No
Wednesday, April 8th, 2020 AT 6:48 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Okay, if the engine RPM's are increasing but the vehicle isn't, it almost sounds like the transmission is slipping.

I need you to check the transmission fluid level to confirm it is clean and full. Here are the directions for doing it.

____________________________________
Engine RPM must be at idle before starting the level check. Keep the transmission fully warmed (valve body ATF temperature: 158-176°F/70-80°C) during the procedure.

1. Park the vehicle on level ground, set the parking brake, block the wheels and start the engine.

2. With the engine idling and regular brakes applied, shift the gear slowly in every range from P to 1 range, and return to the P range.

See pic 1

3. With the engine idling, remove the level gauge and clean off any fluid or foreign material. Insert the level gauge, remove it again, and confirm that the oil level is within the 'HOT' range.

________________________

Let me know.

Joe
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Wednesday, April 8th, 2020 AT 6:13 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Okay Joe. Will do.
Was this
answer
helpful?
Yes
No
Thursday, April 9th, 2020 AT 10:07 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Sounds good. Let me know what you find.

Take care,
Joe
Was this
answer
helpful?
Yes
No
Thursday, April 9th, 2020 AT 4:17 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
I checked. It's not in the 'H" range. What oil shall I use?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, April 10th, 2020 AT 7:25 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

What I am seeing for a 2001 is Dexron III. See attached picture.
Is the fluid clean? (Red in color)
Joe
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Friday, April 10th, 2020 AT 9:01 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Hi. Yes the fluid is clean. (Red in color.)
Thank you for your time Joe.
Was this
answer
helpful?
Yes
No
Friday, April 10th, 2020 AT 9:58 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
You are very welcome. If you have other questions or need anything, let me know.

Take care, stay healthy, and have a Happy Easter!

Joe
Was this
answer
helpful?
Yes
No
Friday, April 10th, 2020 AT 10:16 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Hi. I added more ATF and the level is correct, but the problem still exists!
Was this
answer
helpful?
Yes
No
Wednesday, April 15th, 2020 AT 8:45 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Is it possible for you to drive the vehicle and record what it is doing so I can hear and see what you are experiencing?

Joe
Was this
answer
helpful?
Yes
No
Thursday, April 16th, 2020 AT 6:58 PM
Tiny
DAYEE4LIFE
  • MEMBER
  • 11 POSTS
Hi. Sure I can Joe.
Was this
answer
helpful?
Yes
No
Friday, April 17th, 2020 AT 12:00 PM

Please login or register to post a reply.

Related Transmission Not Shifting Content

Sponsored links