Question about Chevrolet Silverado 1500

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Transmission slips when engine cold - Silverado 1500 Chevrolet Cars & Trucks

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  • Chevrolet Master
  • 3,854 Answers

The usual cause is age related deterioration of the trans fluid viscosity. As the fluid ages, the viscosity and chemical properties of the fluid thins down and changes. 
Have a competent Transmission shop drop your tranny pan, spray down the valve body with chlorinated Brake Clean (which dissolves loose friction material) and have ONLY the GENUINE fluid added, complete with filter and gasket change. 
Also, this problem may also be related to confused signals coming from your throttle body and idle air control valve. Have these items thoroughly cleaned with spray Gum-out to insure proper operation. These gizmo's affect the operation of trans, as well. When your car is right, you should be able to just start the car, in any temperature, and drive away. 

A good transmission shop could scan the computer and pressure test the transmission line. Try this, turn the key's to the run position and remove the ECM Fuse for 5 sec. Place the back in and start the truck, it may stall but don't worry, just re start it. Doing that brings back the default to the ECM like the day it was installed at the factory. The transmission should be fine for a while till the ecm picks something up, and here is an improvment you could have done. 
Have the servo's changed in the 4L60E to a corvette servo's. the cost is like $45.00 for the part and you don't even have to drop the valve body. Takes about 30 min to change so a transmission shop with a oil and filter change should not be more then $200.00 or around there depends on where you live. 
Good luck and hope this helps.

Posted on Apr 20, 2009

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  • Chevrolet Master
  • 6,982 Answers

Slipping of any kind is the result of internal pressure loss inside the unit, caused by wear and hardening of seals. Sometimes, if you catch it early enough you can extend the unit's life by changing the fluid and using a good conditioner such as Lucas. It will not help immediately but if you take it easy for a week or so, it may make a difference.
Keep in mind though...no chemical can replace or repair worn parts...only a rebuild will do that.

Posted on Apr 19, 2009

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Posted on Jan 02, 2017

aadoublea
  • 40 Answers

SOURCE: transmission slips 2000 nissan maxima

Hello,
From what you have described it sounds like the transmission control solenoid pack is hanging up and needs to be replaced.

When you shut the car off it resets the position of the soleniod allowing it to work for a while before it gets hung up again.

Overtime turning it off and back on again won't anymore.

Are you sure the solenoids were new and installed correctly?
Sometimes the replacments you buy are of a worse quality. Their probably is another issue causing your soleniods to wear faster than they are supposed to and when you install inferior quality replacments they may just wear out quicker. I'm not saying this your problem just an idea.

If you haven't changed the fluid and filter in a while then that definetly would be the next thing I would do before anything else.

You can check your fluid to see if its dark and smells burned or if its clean and lighter colored.

I really hope this gets you headed in the right direction and good luck.
If you feel I've helped in any way please give me a fixya rating,
AadoubleA

Posted on Apr 04, 2009

  • 38 Answers

SOURCE: Automatic Transmission Slips

there are a multitude of additives that can possibly get you working for a little while, but unfortunately if it is really slipping, nothing short of a rebuild can fix the problem. The additives will only prolong the life for an indeterminable amount of time.... if at all.

Posted on May 12, 2009

  • 265 Answers

SOURCE: Isuzu bighorn automatic transmission slips after heating

Change your gearbox oil, and clean out the oil strainer.
Should help.

( On some models, you have to remove the gearbox oil pan to clean the strainer )

Posted on Nov 01, 2009

  • 1 Answer

SOURCE: 1999 ford expedition - transmission slip?

my TCIL flashes, checked with code reader. got P1747, pres ctrl sol. A circuit shoted. no visable short on external wiring. fluid in conector on case. could that be the short? or should i look in side?

Posted on Aug 22, 2010

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