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2001 2500HD 6.0 tranny help!

Discussion in 'Chevy Trucks' started by buckhigh, Apr 5, 2009.

  1. buckhigh

    buckhigh Senior Member
    Messages: 183

    Hey guys, getting ready to go on my 4th tranny this year and ready to lose my freaking mind. First tranny had a hairline crack in it. GM picked up the tab and gave me a 3yr, 100k mile warranty on remanufactured ones only. The second one they put it in I burnt the clutch up in it 4k miles later. My third one 8k miles later now slips really bad off the start, and waiting for my fourth one to come in this coming Tuesday. My truck only has 59k miles on it and I baby the heck out of it. I was told by the dealer that Chevy has redesigned the tranny for my truck and are on backorder. They are now making them to order and going on a week waiting for one. Any truth to this?

    My main question to you guys is, are these trannys just junk period? Or is there something else wrong with the truck like the programming that is making me go through these every few months?
     
  2. JD Dave

    JD Dave PlowSite Fanatic
    Messages: 11,045

    My dad had 3 trannies put in his suburban within one year and it was never worked. The dealer put a new torque converter in the last one and it was good after that. I know very little about trannies but I can't understand why the tc would harm the tranny but anyway it's was good for a few after that untill he sold it.
     
  3. SnowMatt13

    SnowMatt13 PlowSite.com Addict
    Messages: 1,533

    4L80 has always been good to me.....in all my Chevy's with them.
     
  4. RBRONKEMA GHTFD

    RBRONKEMA GHTFD 2000 Club Member
    Messages: 2,592

    I had a 02 with a 6 liter in it. I loved that truck. Never had a problem with the trans until I was plowing one morning 2 years ago. this was just because I wasn't completely stopping when shifting from drive to reverese. I now do that as I have a duramax allison combo, and I baby the hell out of that truck. Even when plowing.
     
  5. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    It's not the transmissions they're installing thats defective, its the installers themselves. They're either not replacing the torque converter along with the trans or not flushing/replacing the cooler. Skipping either one is rather common practice now days unfortunately and will kill the new trans in no time due to contamination from the old trans (from the unflushed cooler or used converter) contamination the new trans.
     
  6. buckhigh

    buckhigh Senior Member
    Messages: 183

    B&B, I was told that new torque converters come with the remanufactured tranny everytime. When I go to the dealer tomorrow to get the new one installed, should I demand the cooler to be replaced or just have them flush the line? Do you think GM will cover that or is that all out of pocket?
     
  7. buckhigh

    buckhigh Senior Member
    Messages: 183

    Also, was just told by the dealer that before GM will pay out the warranty for a new tranny, the dealer MUST provide a cooler line flush code before they authorize payment. I guess at this point I just keeping getting junk from Chevy.
     
  8. got-h2o

    got-h2o 2000 Club Member
    Messages: 2,439

    I agree with B&B that it's not the trans, but the installers, and a cooler flush is a big issue too that doesn't usually get performed. No offense to any here, but many GM trans techs are lazy. They slap sh!t together just to get it out and get paid. They are techs but not as educated in transmissions as they should be. They'll pull out forward clutches and replace them without even going into the valve body where the problem lies.

    That being said, 4L60's and 80's have a similar problem. In the valve body there's a metal ball (a few, but one's an issue) that slap back and forth between the VB plates causing fluid to be directed one way or another. ESPECIALLY plow trucks forward to reverse, the tiny ball slams the plate one to many times, causing a divet, till finally one day it begins sticking. When it happens, it partially prevents fluid from flowing and POOOF...........forward clutches start slipping. It throws the trans in a state of confusion, usually making it start in second gear, etc. If you don't notice it instantly (which is nearly impossible), your trans is junk.

    The fix? A polyeurethane ball vs steel. A $.29 fix.
     
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    They can claim that they flushed the cooler all day long on the warranty ticket...doesn't mean their actually performing it. Which sounds like the case here. After this many transmissions I'd certainly be replacing both the coolers. These trucks use a stacked plate cooler which is virtually impossible to remove major contaminates from after that many trans replacments.
     
  10. RLM

    RLM PlowSite.com Addict
    Messages: 1,270

    The trans guy I use (20+ years in the bus.) was telling me that everything on thes trucks is so computer controler, even a bad spark plug (engine not running up to par) can screw up the trans. He's anal, but good ( like balance put in a huge cooler (3 times original) the driveshaft with a trans rebuild). If you've gone through that many there somthing else wrong.
     
  11. buckhigh

    buckhigh Senior Member
    Messages: 183

    Was just told by GM corporate that my transmission differential is shot. Any ideas what would cause this?
     
  12. buckhigh

    buckhigh Senior Member
    Messages: 183

    Also, my case was just escalated to the tier 2 district specialist (wtf does that mean), anything in particular I should demand before this POS tranny gets fixed? Was thinking about a warranty extension, and/or new tranny cooler and lines along with a nerw tranny. Do I have a leg to stand on?
     
  13. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Sounds like the definition of terminology got lost in the shuffle somewhere as I have no idea what a transmission differential is...becuase there is no such thing. You/they meant planet carrier or planetary possibly?

    The dealer will likely be taking more flak for this from corporate than you will...but unfortunately many of the dealer are then forced to trickle it down to the customer since it ties their hands. You can try the cooler replacement request (if corporate hasnt demanded it already) but you should at least still get the original warranty period from the first trans if nothing else.
     
  14. buckhigh

    buckhigh Senior Member
    Messages: 183

     
  15. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Lots of things can cause slippage. Burnt clutches, incorrect fluid level, weak pump, restricted fluid passages (from contamination), damaged sealing rings, O-rings, bad electronics etc.
     
  16. buckhigh

    buckhigh Senior Member
    Messages: 183

    Thanks guys for all your help. The problem was the transmission/drivetrain yoke. I hope this time I have the terminology right? It looks like a "Y" that connects to the transmission and obviously propels the transaxle. They claim it was all corroded and had some play in it that. That play was causing the slipping along with hard tranny shifts. The transmission showed no slip codes and looked really good when they dropped the bottom pan. The total repair was $500 and with the help of the dealer, they convinced GM to pay for it. The truck only has 59k miles and it spends more time in the shop than it does making me money. So after GM saw the history of repairs it was at the dealer for, they were speechless and said this one is on me.