chiel Posted May 12, 2005 Report Share Posted May 12, 2005 my trans isn't shifting from 1-2 at wot, i have to lift the throttle to shift. last time i had this my trans gave up after 2 days. maybe i have a bad valvebody? will one from a 4L60E fit? Other idea's? Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted May 12, 2005 Report Share Posted May 12, 2005 Did the tune change at all? What are your trans temps during this? Link to comment Share on other sites More sharing options...
chiel Posted May 12, 2005 Author Report Share Posted May 12, 2005 Did the tune change at all? What are your trans temps during this? <{POST_SNAPBACK}> no tune change, trans temp since rebuild on 200. trailblazer t.c. shift kit, corvette servo, acc.piston. Link to comment Share on other sites More sharing options...
misterp Posted May 12, 2005 Report Share Posted May 12, 2005 200-degrees?! You sure about that Chiel? Do you have a tranny cooler? Mr. P. Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted May 12, 2005 Report Share Posted May 12, 2005 200* is too hot. Link to comment Share on other sites More sharing options...
Jonmalibuss Posted May 12, 2005 Report Share Posted May 12, 2005 I had this exact same problem with my first trans WOT it would not shift 1-2 and felt as if it went into neutral till I got off the throttle and the rpm came down a bit. The dealer changed the valve body and it was fine. Link to comment Share on other sites More sharing options...
BmanSS Posted May 12, 2005 Report Share Posted May 12, 2005 my trans isn't shifting from 1-2 at wot, i have to lift the throttle to shift.last time i had this my trans gave up after 2 days. maybe i have a bad valvebody? will one from a 4L60E fit? Other idea's? <{POST_SNAPBACK}> i would get it on a scanner and see if its commanding the shift,you may have a bad TPS Link to comment Share on other sites More sharing options...
chiel Posted May 13, 2005 Author Report Share Posted May 13, 2005 my trans isn't shifting from 1-2 at wot, i have to lift the throttle to shift.last time i had this my trans gave up after 2 days. maybe i have a bad valvebody? will one from a 4L60E fit? Other idea's? <{POST_SNAPBACK}> i would get it on a scanner and see if its commanding the shift,you may have a bad TPS <{POST_SNAPBACK}> i see in the scan tp at 99% 57mph and 6030 rpm and fuelcutoff(revlimiter) i used the towmode yesterday but can't think how this could effect things. the transtemp meter is allways between 1/2 and 2/3 on the meter, full gauge is 300 so 2/3 is 200 Link to comment Share on other sites More sharing options...
zippy Posted May 13, 2005 Report Share Posted May 13, 2005 what you need to do first is see if the pcm is commanding the shift. this will tell you if your problem is in the programming or of it is in the trans itself. if the pcm commands the shift and it doesn't occur, you have a trans problem. if you don't see it commanding the shift to second before you hit the rev limiter you have a programming problem. Link to comment Share on other sites More sharing options...
chiel Posted May 13, 2005 Author Report Share Posted May 13, 2005 what you need to do first is see if the pcm is commanding the shift. this will tell you if your problem is in the programming or of it is in the trans itself. if the pcm commands the shift and it doesn't occur, you have a trans problem. if you don't see it commanding the shift to second before you hit the rev limiter you have a programming problem. <{POST_SNAPBACK}> i don't know how i can see it commanding the shift in the log Last time it went the same way, i think i have a problem in the valve-body. Does the 4l60E valvebody fit the 4L65E? i transport my car next week to the transshop. Link to comment Share on other sites More sharing options...
zippy Posted May 13, 2005 Report Share Posted May 13, 2005 yes, but they do have some differences. Link to comment Share on other sites More sharing options...
Dr Mike Posted May 14, 2005 Report Share Posted May 14, 2005 I had this exact same problem with my first trans WOT it would not shift 1-2 and felt as if it went into neutral till I got off the throttle and the rpm came down a bit. The dealer changed the valve body and it was fine. <{POST_SNAPBACK}> There a Tecnical Service Bulletin out for the 4L65E Trans. This tranny is the same beefed up puppy found in the 2500HD series, the 4L60E is the almost same except it's not rated HD. At least GM put in the most expensive tranny(except for the Allison) in ths SS. Mine was doing same, runs fine with new v version of valve body Should be covered under your warranty. Dr Mike Link to comment Share on other sites More sharing options...
chiel Posted May 14, 2005 Author Report Share Posted May 14, 2005 I had this exact same problem with my first trans WOT it would not shift 1-2 and felt as if it went into neutral till I got off the throttle and the rpm came down a bit. The dealer changed the valve body and it was fine. <{POST_SNAPBACK}> There a Tecnical Service Bulletin out for the 4L65E Trans. This tranny is the same beefed up puppy found in the 2500HD series, the 4L60E is the almost same except it's not rated HD. At least GM put in the most expensive tranny(except for the Allison) in ths SS. Mine was doing same, runs fine with new v version of valve body Should be covered under your warranty. Dr Mike <{POST_SNAPBACK}> No Warranty for me overhere (europe) it's not "officialy" imported by the dealer. I 3 times e-mailed the dealer in texas about the tailgate-cable's but got no response The transshop overhere doesn´t have a 4L65E valvebody but has from the 4l60E. So what steps can i take to get the new version of the valvebody overhere? Link to comment Share on other sites More sharing options...
Dr Mike Posted May 15, 2005 Report Share Posted May 15, 2005 I had this exact same problem with my first trans WOT it would not shift 1-2 and felt as if it went into neutral till I got off the throttle and the rpm came down a bit. The dealer changed the valve body and it was fine. <{POST_SNAPBACK}> There a Tecnical Service Bulletin out for the 4L65E Trans. This tranny is the same beefed up puppy found in the 2500HD series, the 4L60E is the almost same except it's not rated HD. At least GM put in the most expensive tranny(except for the Allison) in ths SS. Mine was doing same, runs fine with new v version of valve body Should be covered under your warranty. Dr Mike <{POST_SNAPBACK}> No Warranty for me overhere (europe) it's not "officialy" imported by the dealer. I 3 times e-mailed the dealer in texas about the tailgate-cable's but got no response The transshop overhere doesn´t have a 4L65E valvebody but has from the 4l60E. So what steps can i take to get the new version of the valvebody overhere? <{POST_SNAPBACK}> That sucks, on top of service problems you must be paying through the nose for gas in europe... Have you tried GM Tech in Detroit or Oshawa Ontario Canada. I'm not sure, but I think member Hamur may work at GM Canada Plant in Oshawa, Canada and who knows maybe can put you on path to getting you. Hope you get your problem resolved by GM. Cheers Dr Mike Link to comment Share on other sites More sharing options...
chiel Posted May 15, 2005 Author Report Share Posted May 15, 2005 thanks guys, i am working on it, with help from a member (aspentailor) of this forum. knowing the problem is half the solution Link to comment Share on other sites More sharing options...
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