Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Chevy S10 - GMC S15 and Sonoma Transmission Problems



  • krechkrech Posts: 1
    did you ever figure out what your issue was? My 01' did the exact same thing this week
  • gonogogonogo Posts: 879
    [seckard] symptoms are a broken sun shell, common problem on the 4L60E. Needs to be removed, dissembled and repaired. If high mileage, should be overhauled.
  • ok, so here it is. I have a 2001 sonoma with 110,000 miles. Auto trans., and the 2.2 engine. About 1,000 miles ago I got the check engine code P1870. (Transmission Component Slipping). So, I had all the fluids and filters changed. I mean all. Drained the pan and replaced the filter and had the system pumped out. When I did this, I did not have any metal shaving at all on the magnets inside the pan, but some of the plactic retaining clips on the wiring harness where very brittle and some even broken. But all connections seemed to be fine. I reset the codes and drove the truck for about 600 miles and the check engine code came back on. The Chevy garage told me it could be as simple as a external sensor, or much worse. I took the truck to a transmission shop, and the guy there told me that it would be about a 300.00 job, and then he said oh yes... that is unless he fines any of the plastic inside the pan housing broken. He said if that is the case I need a total break down and rebuild, and new wiring harness.. he said this would be between 1200.00 to 1400.00. Someone anyone... Is this the case? The truck seems to run and shift just fine on short trips, but anything over 30 to 40 miles and when shifting there is a short lag between first and second and if climbing a hill sometimes will then kick out of passing gear.
  • gonogogonogo Posts: 879
    What I found out on the web is. The most likely cause is worn pump bushings and worn valve body.

    Sometimes just replacing or repair of the valve body will work, a sure thing is pump bushings also. The valve body can be done installed, trans needs to be removed for pump bushing. At 110,000 most shops would want to do a complete overhaul if removed for repair.

    The $300 sounds like valve body repair, that may work, if not pump bushing next.

    If it was mine I would want both done, The pump is the first part to be removed so no need to go further.

    Not too scare you but, if it gets to the point where it will not go into OD you will burn up the transmission, converter and all.
  • mm98s10mm98s10 Posts: 1
    hello, I have a problem with my s-10's transmission. It's slips alot when i am at about 3,000RPM. i would like to know what make the transmission is and i dont know where the torque converter clutch solenoid will do any good. If its not the TCC then what could it be? Thanks for your help
  • hoodlatchhoodlatch Mid-westPosts: 255
    I had a similar problem with my 97. After doing all the things you described and it still not shifting like it should I replaced the wiring harness to the ignition switch and that fixed it. The box in the harness had worn connectors. Good Luck.
  • gonogogonogo Posts: 879
    4L60E transmission, take it to a trans shop and let them diagnosis it. I think you need internal repairs, probably overhaul.
  • jim_brrwjim_brrw Posts: 1
    I have a problem with my 2002 s10 crew cab, its the v6 4.3l engine, everything seems to run well when the engine is cold but after it gets hot it starts slipping or not going into the right gear. at points it will keep me from accelerating but the if i turn the engine off for a minute or two it will work for awhile. anyone know what the problem is?
  • srs273srs273 Posts: 3
    Sons truck broke transfercase to tranny housing, lost all fluid.
    Replaced housing and found trans slipping at higher speeds.
    Told him to replace trans with rebuilt. Bought used one and had his friends install...(Ishould have done it)
    Now it does NOTHING! Just revs in all gears, no grinding or odd noises. He said when the finished it moved out of garage, they stopped and check levels of fluid, added more. Than it did nothing. I checked level and it was 1/2 up the stick..I mean like 4 qts heavy!, I pulled pan, filter is good, lots of metal on magnet. Filled to proper level. Still nothing. I hate to believe he got a bad trans but would like to know if they maybe missed something? For it to wrok for a moment and not to work after over filling seems odd.

  • gonogogonogo Posts: 879
    Don't know where they got the used one, all junk yards will guarantee it will work or they will replace it.
    If it won't go in manual 1-2-3-R, it's not electrical.
  • zardoz1114zardoz1114 Posts: 12
    '95 S-10 ,4.3, 4x4. automatic
    All I have is 2nd and reverse. Speedometer quit at the same time.
    This is the nightmare year that was in between ob1 and ob2 that you can't pull codes from. What were the "brains" at GM thinking?
    New filter and fluid.
    No matter where the shifter is in forward it starts in 2nd when it finally does try to upshift it acts like it's in neutral and drops back to 2nd when I step on the gas.
    Also anti-lock started to act up about a week before tranny problem.
    Any suggestions ?
    Stuck without a ride until I fix it. Low on $$$$
    Know my way around a wrench.Not a newbie.

  • Im working on a 98 s10 2wd and put a fresh rebuit tranny in. The problem im having is it seems to slip every gear, put it on a comp scanner showed no codes but sitting idling in park shows going 130mph and output rpm 7616. Not sure where to go next to fix the problem. Any advice would be helpful.thanks
  • zardoz1114zardoz1114 Posts: 12
    While I'm here,forgot to ask last time.
    Does anybody make a decent S-10 shop manual?
    Clymer's and Chilton are a joke and the 4x4 section is disgusting at best.
    My Bentley books (vw) are big bucks but at least they cover things.
  • gonogogonogo Posts: 879
    So you want good expensive books, go here.
  • zardoz1114zardoz1114 Posts: 12
    THAT'S what I was looking for, thanks !
    Just ordered what I needed.
    Hope shipping doesn't take too long.
    Not cheap, but you get what you pay for.
    I noticed that you have helped a lot of people here.

    I'm new to this forum, so far it's the best one I've found.
    It seems most of the others are filled with kids wanting to know how
    to bag their ride, install a "fart can" , or sub-woofer.

    Any thoughts about my tranny problem in my first post?
    I've had other cars that went in to "limp home" mode act like this.
    With no way to pull codes from a '95, I'm kind of shooting in the dark here

    Thanks again,

    Bob in Ohio
  • zardoz1114zardoz1114 Posts: 12
    Make sure the year matches up.
    They used the same trans in a bunch of different years, but not the same computers in the truck. The transmission must match the computer. And NO the computer from earlier years '94 or '95 won't work in newer ones. '95 was an oddball it only fits 1 year.

    May not be your problem, but something to look at.
  • gonogogonogo Posts: 879
    Manual low is not electrical, so if no low in manual low, you have a hard part problem.
    Needs to come apart.
  • zardoz1114zardoz1114 Posts: 12
    That's what I was afraid of.
    Found another '95 transmission, transfer case, and t converter for $200.
    Ugh I hate the thought of doing this job , No help around.

    Bob in Ohio
  • gonogogonogo Posts: 879
    Not bad if you can rent a transmission jack.
  • zardoz1114zardoz1114 Posts: 12
    Got one.
    Only problem is I've got so much stuff in the way it takes me an hour to make room to work on anything. Have a workshop that I built to work on 1 car at a time that has more stuff in it than most dealerships, everything but a lift.
  • gonogogonogo Posts: 879
    Ya, should have went for 2 bay.
  • zardoz1114zardoz1114 Posts: 12
    $12.00+ shipping.on eBay.
  • gonogogonogo Posts: 879
    Good deal, let me know what you think of it.
  • zardoz1114zardoz1114 Posts: 12
    The one I got was the Driveability, emissions, and electrical manual,
    Used, but in better shape than described, mostly on the cover, just a little dirty.
    1 of a 2 part set.
    The others are (2) the mechanical, and there are some detailed supplements for sub-systems like air bags, A/C, anti-lock, auto-transmission.
    The one I have details all the problems that have you banging your head against the wall, and in depth coverage. Not for the guy with a screwdriver and a $5.00 socket set with the car up on cement blocks behind the house.
    Been there, done that. (young and dumb) I miss my '65 Satellite street racer, and my hair ! Getting the mechanical book when the price is right.

  • gonogogonogo Posts: 879
    I once bought a 1985 Cavalier factory manual, they give you instruction on how to rebuild everything on the car, stuff you would never do. Like Hydraulic rack, axle shafts.
  • I have a '99 Sonoma. Trans started acting up on highway. It would rev up at 55-60 mph and if I put my foot down just alittle, it would shift back into OD. If I run her in 3rd, not a problem. It got so bad that I thought I wouldn't get her home one night and didn't use her for over a year. ( I only use this truck for light hauling and shifting work equiptment as needed.) After giving her a loooong vacation, the trans was absolutely perfect for at least 2500 miles. Then suddenly, back to old habits.

    Pulls and shifts good, just this little glitch.

    I suspect a solenoid or modulator problem, but I dont know enough about these new fangled computer trannys to know where to start.

    Any suggestions?
  • gonogogonogo Posts: 879
    A good start would be a pan drop oil and filter change. When pan is down look for debris, metal, clutch particles. NO Flush.
  • mviltmvilt Posts: 2
    iam looking for help my 2000 gmc sonoma 2.2liter seems too shift ok in lower gears but wont shift into overdrive or passing gear or whatever damn gear it is it automatic and my rpms at 3000 at 55mph i have checked vac lines changed fluid trans filter any body have a clue of what the hells going on
  • mviltmvilt Posts: 2
    Can anyone give me any ideas on what to check out? From messaege 241, please read. Thanks
  • I am having trouble with my transmission not wanting to shift out of 2nd and just revs. This is my third transmission and this one didn't even last a month. Is that sad or what. The business that replaced it says they are not going to gives us another one they are saying that their is something wrong with the truck and not the transmission. I don't know what to do now we are out of money and ready to just hand over the truck! If anyone has any advice please let me know!
Sign In or Register to comment.