Changing the transmission oil high mileage

Tiny
JOE BARBY
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 4.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Vehicle listed above has a 4L60E transmission. Pretty high milage nearing 200,000.

Installing all new--


2- Shift Solenoids (A and B).
1- Transmission 3-2 Shift Solenoid Valve.
1- Transmission Torque Converter Clutch Pulse Width Modulation Valve.
1- Transmission Accumulator.
1- Filter and Gasket.


Had this car for 4 years and it has been good enough but after a 300-mile road trip (all freeway). And 3 days later transmission lines sprung a leak after that; the transmission was only shifting to first and second and nothing above second gear or reverse. I luckily Googled the symptoms, and it is bad shift solenoids. I saw how easy my model transmission is to repair the solenoid repair. So, I took out some tools and purchased all the parts on Amazon (I'm 66 year old sick and crippled and live alone) so happily I have Amazon prime, and parts show up the next day.


The job took me 3 hours to remove the oil pan off and clean everything and it was clearly it has Never been serviced. Gunk and oil were black and syrupy. And the magnet had 3/8-inch-thick gunk.


This brings me to my dilemma: after removing the old filter that darn plastic bushing is cemented in the valve body. I just ordered a seal removed designed for this kind of deep seal.

Question. If I use a heat gun to heat the plastic seal, will it be easier to remove while not scratching the metals?

Question 2. I need ("the exact torque") for the 3 accumulator bolts and all of the oil pan bolts (in ft pounds please) my wrench starts at 10 lbs standard.

Question 3. The pan and all the mating surfaces are nearly pristine, and the pan and gasket came right off with almost zero scraping. I'm generally opposed to using sealant glues if it's not absolutely necessary. I wonder if I should use some or not.

I am amazed how simple the whole thing is to fix. The YouTube videos are very helpful. But I haven't done this kind of work on my own cars in 15 years; So, I'm somewhat insecure.
Wednesday, October 6th, 2021 AT 7:44 PM

7 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

If you use a heat gun on the old seal, just be care full not to allow the metal to overheat. It should make the seal easier to remove (it will likely deform it).

The transmission pan bolt torque: 11.8 ft. lbs (16Nm)
The accumulator bolt torque: 8.11 ft. lbs (11Nm)

It is a good idea to use sealant on the replacement gasket. The metal on the pan or the mating surface on the transmission housing can have deformities that are not visible. If you use a sealant then you won't have to worry about that.

https://www.2carpros.com/articles/automatic-transmission-problems

I have attached the diagrams for your reference.

Please let me know of you need any other information.

Thank you.
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Wednesday, October 6th, 2021 AT 9:16 PM
Tiny
JOE BARBY
  • MEMBER
  • 4 POSTS
Thanks for the advice. I have a follow up question. 4L60E

I am having trouble removing the old oil filter sleeve/seal out of the transmission body. Will the old seal still provide a proper hold? I worry that this removal tool will scratch the mating surfaces.
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Thursday, October 7th, 2021 AT 12:55 PM
Tiny
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It will be best to replace the seal. As for using the tool, just careful if you use that. I have used this tool that you have in the picture, many times to get seals out without issues.
You can also wrap it with electrical tape on the part that can scratch the surface.
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Thursday, October 7th, 2021 AT 2:32 PM
Tiny
JOE BARBY
  • MEMBER
  • 4 POSTS
I bought all the parts for all the following.

4L60E Shift Solenoids and parts.

2- Shift Solenoids (A and B).
1- Transmission 3-2 Shift Solenoid Valve.
1- Transmission Torque Converter Clutch Pulse Width Modulation Valve.
1- Transmission Accumulator.
1- Filter and Gasket.

I am expecting a mechanic friend of my daughter to visit me this weekend and put everything back together because I've had two physical related angina heart attacks in the past two days just working on this simple repair.
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Thursday, October 7th, 2021 AT 3:06 PM
Tiny
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Let me know how it turns out or if you have any questions.
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Thursday, October 7th, 2021 AT 3:13 PM
Tiny
JOE BARBY
  • MEMBER
  • 4 POSTS
I am having an issue with getting an inexpensive volunteer to finish the solenoid replacement. I looked at the accumulator and only see two bolts holding it in, but my replacement part has THREE bolt holes.

I managed to get the pan and filter removed and now is where I need help because of that accumulator and replacing all the solenoids with my 66-year-old crippled back and hands.

I was trying to build up my confidence and do it all myself but each time I wheel my creeper under the car, I have a heart attack. And those solenoids require a minimum level of manual dexterity and I'm not sure of myself and I need a confident hand to get it together for me.

I have never been without a car for this long "ever". And since I live alone and only girls my family thirty-five miles away.

Is it legal in here to ask for a low cost or volunteer mechanic in my area that can make a house call? I just have about enough money to offer a Buck ($100.00) for this service. It's in my driveway and up on ramps. Pan and filter are already removed. All the parts and tools are here and ready.

Thanks for your time.
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Sunday, October 10th, 2021 AT 5:41 AM
Tiny
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Depending on where you located, most cities/towns usually have mobile mechanics who will come to your house or office to fix vehicles. Just do a search for Mobile mechanics for your local area. Something should come up.
Usually, they offer reasonable rates. But then again it will depend on your location. Let me know if I can provide any other information.
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Sunday, October 10th, 2021 AT 2:21 PM

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