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Transmission Troubles

MSUChevyMan

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MSUChevyMan Enthusiast

MSUChevyMan

Posted
Posted

I've got a 99 Silverado 5.3L with an automatic transmission. It's got a hard time shifting into overdrive. I had it serviced for a general tuneup/fluid change, and the problem is still there. Does this sound like a serious problem?

budhayes3 Senior Enthusiast

budhayes3

Posted
Posted

When you say "hard time", do you mean the 3-4 shift is hard, or it doesn't go into 4th gear? I'm assuming the fluid level is good...how many miles does it have?

MSUChevyMan Enthusiast

MSUChevyMan

Posted
  • Author
Posted

When I say 'hard time' I mean that it slips numerous times before it shifts. If I get to the point where it slips and back off, and then hit the gas hard, it will make it by the slipping point just fine. I've got 102,500 miles right now.

budhayes3 Senior Enthusiast

budhayes3

Posted
Posted

Ugh, it's slipping. Could be a servo/accumulator problem, or possibly it's just worn out. If the fluid is full and the engine is operating normally, I would definitely get it checked out. Could be serious, or it could just be a matter of removing the pan and valve body and replacing some components there.

 

Has anyone else experienced this? What was the outcome?

  • 5 weeks later...
bigblock_454 Enthusiast

bigblock_454

Posted
Posted
Ugh, it's slipping. Could be a servo/accumulator problem, or possibly it's just worn out. If the fluid is full and the engine is operating normally, I would definitely get it checked out. Could be serious, or it could just be a matter of removing the pan and valve body and replacing some components there.

 

Has anyone else experienced this? What was the outcome?

 

 

 

going to my third tranny 3rd gear pack is probably going dont change the fluid

did that had to replace tranny in two weeks .what happens if you only change it when it gets bad is the new fluid cleans the bands of the build up and everthing becomes loose and boom goes tranny.hope you get some some help or just replace it with a good rebuild make sure you get good warrenty as the dont always get built right

  • 2 years later...
oifhooligan04 New Member

oifhooligan04

Posted
Posted

got sorta the same prob....

 

01, 5.3, 4l60E, not even 70k on it... It has the usual "clunk" for P to D, but at 50 mph it hesitates or "chugs" until 55mph. powering though it like 0-60 (merging on to the interstate) is fine but casual coasting and sure enough it happens again, fluids fine, changed roughly 3mos ago, no codes showing, not sure of a course of action any ideas? :):crackup::crackup:

redvett Senior Enthusiast

redvett

Posted
Posted

Most of the failures are caused by drivers backing up & slipping into drive while still going back wards. This causes unreal clutch wear and abuse of the planetary gears causing failure.

svensk Senior Enthusiast

svensk

Posted
Posted
got sorta the same prob....

 

01, 5.3, 4l60E, not even 70k on it... It has the usual "clunk" for P to D, but at 50 mph it hesitates or "chugs" until 55mph. powering though it like 0-60 (merging on to the interstate) is fine but casual coasting and sure enough it happens again, fluids fine, changed roughly 3mos ago, no codes showing, not sure of a course of action any ideas? :):crackup::crackup:

I notice most of that stuff but, the clunk from P to D or P to R is the slip yoke/U-joint clunking.

oifhooligan04 New Member

oifhooligan04

Posted
Posted

well, changed the ujoints roughly the same time as the trans filer/oil, had step father look at it and drove it as well, the "chugs" only happen after it reaches operating temp... so i'm still perplexed on the problem and a course of action, plus today when my stepdad drove i got a weird whine from the back...( had the slider open) .... so.... i'm batting a thousand right now... :)

  • 4 weeks later...
oifhooligan04 New Member

oifhooligan04

Posted
Posted

well...

 

got some advice from a friend working at local tranny shop chain so i changed shift solenoids. probelm was used dex/merc AGAIN had same prob last time i changed filter, so i used dex6, still has overdrive prob but runs like a champ otherwise.. but problem (shifting) still persists.. plan on keeping truck but kinda strapped for cash. any ideas?? :cheers::banghead:

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