Transmission not shifting from first to second gear normally?

Tiny
HUNT69
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 300,000 MILES
The transmission only has issues shifting from first to second, you have to let off the gas for it to shift. Once it shifts the other gears shift normally. I'm not sure if it is a simple fix or something actually in the transmission that's broken but I would like some help figuring it out. Thank you.
Wednesday, December 13th, 2023 AT 6:52 PM

9 Replies

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
When was the last time the transmission was serviced? When it shifts from first to second is it a hard shift or a very soft shift? What happens when you try to shift it manually from first to second? And the most important thing is, have you checked the fluid level? And if you have used a white paper towel, describe to me the color of the oil or send me a picture.
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Wednesday, December 13th, 2023 AT 6:58 PM
Tiny
HUNT69
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  • 5 POSTS
I had changed the fluid as soon as I got the truck, so it is still good clean red ATF. When it shifts it is just a normal tight shift, no slipping or anything. When I try manually shifting it, it doesn't do anything.
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Thursday, December 14th, 2023 AT 5:40 AM
Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
You change the fluid as soon as you got the truck. Was it because the fluid was dirty or was the transmission acting up? When you say a normal tight shift do you mean a hard shift? The transmission shifts firmly? Do you mean when you're manually shifting it from first to second that it doesn't shift? Or that it shifts and feels like it goes into neutral?
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Thursday, December 14th, 2023 AT 8:10 AM
Tiny
HUNT69
  • MEMBER
  • 5 POSTS
I changed the fluid because it was acting up hoping that fresh fluid would fix it, I even put a new filter in it as well. I meant it is shifts like a normal transmission should. I was manually shifting it from 1st to 2nd and it didn't shift just like if it was in drive and not letting off of the pedal.
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Thursday, December 14th, 2023 AT 8:38 AM
Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
It sounds to me like the forward clutch pack is gone that handles third and fourth and then the torque converter locks up for 5th let me do a little bit of study on this and I'll get back to you.
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Thursday, December 14th, 2023 AT 11:18 AM
Tiny
HUNT69
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  • 5 POSTS
Okay, 3rd and 4th gear shift just fine. It's just first to second that it has issues with I think it is only a 4-speed overdrive transmission should be the 4L60e.
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Thursday, December 14th, 2023 AT 12:07 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,149 POSTS
We need to run the codes to see if any are stored, to me it sounds like the 1/2 shift solenoid is getting weak which is common. Please go over this guide and I have included how to change the solenoid out in case code comes up for it.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

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Thursday, December 14th, 2023 AT 1:09 PM
Tiny
HUNT69
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I had actually put new shift solenoids in it as soon as I got the truck a week ago, I changed all the fluid and changed the filter also. I hooked up my Snap-On scanner and it wasn't throwing any codes, and the live data was showing everything was functioning properly.
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Thursday, December 14th, 2023 AT 2:14 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,149 POSTS
Okay, then chances are there is something wrong internally and the transmission will need to be disassembled for inspection. This video will show you step by step what to do on a similar vehicle and instructions in the image below for your truck.

https://youtu.be/3vJAojsrfuU?si=geobbNxiaqFUf_7o

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Saturday, December 16th, 2023 AT 10:08 AM

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