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trans problem

jm99z71

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jm99z71 Enthusiast

jm99z71

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this is my first post. i have been reading this forum for quite a while & have found the info. posted here to be excellent in solving several past problems with my truck. tonight on my way home from school (i am an instructor at an apprenticeship program.), my 99 gmc sierra w/4.8eng& 4l60e trans. the engine started revving very high @ 70mph. the truck would not go with the shifter in D. i pulled off highway & found the trans. only had 1st & 2nd gears working. i was able to get the truck home using 2nd gear & traveling slowly.this past weekend the 4x4 selector switches were flashing & a service 4x4 message appeared but went away.the same thing happened tonight the only difference was tonight the 2wd light never came back on. is the trans. shot? any help would be great . thanks to all in advance. jm99z71.

95Sierra2500 Senior Enthusiast

95Sierra2500

Posted
Posted

For some reason your truck went into 'limp home' mode where it only uses reverse and 1st and 2nd I believe? I'd actually recommend going someplace where they can read the data stored in your computer, not just the codes (dealership or an independant shop can usually do this). As said, this could be the computer or one of many sensors going kaput. Or it could be the sign of something MUCH more serious going on.

jm99z71 Enthusiast

jm99z71

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i checked for codes today & the only code that is stored is for the mass air sensor. the truck is going to a shop monday to be looked at. i will post problem & hopefully the solution when i find out. thanks again for the help. jm99z71.

  • 2 weeks later...
jm99z71 Enthusiast

jm99z71

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i just wanted to update info on trans problem. the garage that i took the truck to reported 3rd & 4th gears are shot, they are going to have to rebuild the trans.the cost will be $2500 with a 1yr parts & labor warranty. i should have the truck back sometime next week. jm99z71.

95Sierra2500 Senior Enthusiast

95Sierra2500

Posted
Posted

How many miles where on that trans, and what kind of driving do you do (highway, off-road, towing?)? That trans sounds too new to be having that kind of issues unless you tow alot of heavy loads or haven't changed the oil in a LONG time.

 

Also, did they give you a cause of the problem yet? What made them think that 3rd and 4th are both shot, other than that it won't go into those gears? It could be something as simple as the oil pump isn't functioning properly.

Jim2002Z71 Enthusiast

Jim2002Z71

Posted
Posted
i just wanted to update info on trans problem. the garage that i took the truck to reported 3rd & 4th gears are shot, they are going to have to rebuild the trans.the cost will be $2500 with a 1yr parts & labor warranty. i should have the truck back sometime next week. jm99z71.

 

 

 

Mine did the same thing (62K)..but it was 1st & 2nd...it RIPPED the splines out of the 2nd clutch shell...and I drive like an old lady, no towing...$2502 3 year nationwide wty..

jm99z71 Enthusiast

jm99z71

Posted
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the truck has a little over 75,000 miles on it. i am the second owner & don't really know what was done with the truck previously. the truck has a class two hitch & may have been used for towing but i can't confirm that.(carfax revealed nothing alarming). i had the trans fluid changed at approx 74,000 miles by a local gmc dealer while the truck was in for recall service. i rely on a company van for work & use my truck basically for trips to the home center .the mechanic at the garage said that the 3rd & 4th gear bands had disentigrated . the rebuild will include heavy duty parts. the garage was recomended by a friend who had his 99 tahoe's trans rebuilt by this garage & is very happy with the job they did. i should hear something this week & i will report back when i know more.

95Sierra2500 Senior Enthusiast

95Sierra2500

Posted
Posted
the truck has a little over 75,000 miles on it. i am the second owner & don't really know what was done with the truck previously. the truck has a class two hitch & may have been used for towing but i can't confirm that.(carfax revealed nothing alarming).  i had the trans fluid changed at approx 74,000 miles by a local gmc dealer while the truck was in for recall service. i rely on a company van for work & use my truck basically for trips to the home center .the mechanic at the garage said that the 3rd & 4th gear bands had disentigrated . the rebuild will include heavy duty parts. the garage was recomended by a friend who had his 99 tahoe's trans rebuilt by this garage & is very happy with the job they did. i should hear something this week & i will report back when i know more.

 

 

 

 

I still say you're getting ripped off. Unless they're pulling the trans as well, in which case they're still overcharging, but not by near as much. Maybe I feel this way though because I know a guy here who will pull your trans, rebuild it with race-quality parts (yes, drag car parts) and reinstall it for about $1100...Or you can pull/install and he'll rebuild for about $500...And that trans will be good for getting abused for roughly 180K miles.

jm99z71 Enthusiast

jm99z71

Posted
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i talked with the mechanic today & he said that there was little to no friction material left on the bands.the mechanic also said that he would be replacing the sun gear as well & the trans is out of the truck for the rebuild. i had a trans go bad a number of years ago in a 87 dodge dakota 4x4 & that cost $1800 for a rebuild at that time.i live in the northeast (ct) & everything seems to be more expensive here.i have to say that this my first gm truck, over the years i have always had fords other than the dakota & have never had many issues with them (6 total).i figured i would give gm a try as i always try to buy american.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted
i just wanted to update info on trans problem. the garage that i took the truck to reported 3rd & 4th gears are shot, they are going to have to rebuild the trans.the cost will be $2500 with a 1yr parts & labor warranty. i should have the truck back sometime next week. jm99z71.

 

 

 

 

 

$2500.00? Man,Thats alot! You could've bought a GM-Goodwrench "SRTA" Transmission with a 3yr/100,000 mile warranty cheaper than that.

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