russian rocket Posted July 18, 2011 Report Share Posted July 18, 2011 hey guys im trying to help a buddy of mine out who just bought a 99 z28. the problem he is having is, that if you put it in Drive it will start off in 2nd and does not go into od. he can manually put it into 1st and shift it up but still doesnt go into od. now the previous owner said he had the trans rebuilt and a shift kit put in. then he replaced all the solenoids, wiring harness, and module and claims that all the trans needs is to be retuned. iv googled it and i have not seen anyone needing a retune after new solenoids. so if you guys have any insight, it would be greatly appreciated. one other thing, the previous owner said he had it hooked to a computer and it showed it was shifting into od but wasnt physically doing it. Quote Link to comment Share on other sites More sharing options...
Cordell Posted July 18, 2011 Report Share Posted July 18, 2011 I'm not as knowlegable as some when it comes to trannys but my last 4L60 did that, it was fucked. Pull the trans out and give it to someone who knows what they're doing. Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted July 18, 2011 Report Share Posted July 18, 2011 sounds like he is anout to loose reverse and it probably needs rebuilt. This is what happened to mine. Had to let off the gas to shift from 2-3 and it never went into od and then I lost reverse completely. made it to ips luckily and had them rebuild it Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 18, 2011 Report Share Posted July 18, 2011 Check to make sure it isn't engine misfiring. An active misfire code will disable the OD. Quote Link to comment Share on other sites More sharing options...
pontiacfreak142 Posted July 19, 2011 Report Share Posted July 19, 2011 Like scott said, its probably fucked and needs rebuilt. And no a tranny should not need a tune after simply having new replacement parts put in Quote Link to comment Share on other sites More sharing options...
atomicfusion1647545515 Posted July 19, 2011 Report Share Posted July 19, 2011 That sounds like a broke tranny... 3-4 pack is bad for sure... maybe more. Quote Link to comment Share on other sites More sharing options...
Tractor Posted July 20, 2011 Report Share Posted July 20, 2011 Check to make sure it isn't engine misfiring. An active misfire code will disable the OD. Good point, while your at it check any codes. Codes will cause the "limp" mode which is almost exactly what your describing as your symptoms anyway. Since you just bought it maybe someone took the bulb out of the "check engine" warning indicator. Quote Link to comment Share on other sites More sharing options...
russian rocket Posted July 21, 2011 Author Report Share Posted July 21, 2011 Good point, while your at it check any codes. Codes will cause the "limp" mode which is almost exactly what your describing as your symptoms anyway. Since you just bought it maybe someone took the bulb out of the "check engine" warning indicator. i dont think its in limp mode because there arent any lights on and it shifts from 2nd-3rd just fine when its in drive Quote Link to comment Share on other sites More sharing options...
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