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4L60E won't shift out of first

Truck won't shift out of first. try to drive acts like stall converter or tow button is on and when slowing down from acceleration acts like its tryen togo bak in to first shuttering and whining. if put in first and take off it doesn't do the noise or shutter and stall. reverse and first is all its has. it was just rebuilt and all the extras installed billet solenoids clutches planetary torq conv all the trimmings. doesn't smell burnt. I've chased down wires everything i could think of idk wtf. only has roughly 25,000 on tranney/

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Rebuilt the Trans.(4L60E) in my

did you do the rebuild or did a shop do it? it sounds like the clutches werernt done properly. if the reverse is out the other gears will go out too if driven too far in that condition,

Posted on Jan 19, 2009

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  • 1118 Answers

SOURCE: 95 GMC Jimmy 4L60E no 2nd or OD 4L60E

You might want to try this if its got a kick down cable unhook it from throutle body and pull it out as far as you can and let it snap back, do this a few of times, sometimes a valve gets hung up inside valve body of trans. and won't let it shift. If that don't help you may have to pull pan to dislodge it if thats the problem. chk. the plug on trans. (Its a 4 wire white plug) with test light with key on to see if there is power down there one will be hot, thats for overdrive, now on top of intake in front throutle body there is a sending unit that looks like a temp. sending unit with a 2 wire plug on it that sends a signial down to that plug when engine gets to temp. to let it shift to overdrive. Maybe this will help, or give you some ideas.

Posted on Mar 02, 2009

  • 158 Answers

SOURCE: no reverse after rebuild on 4L60E Transmission from 1995 GMC Sono

There isn't a modulator on this trans as it is electronic

You can have first gear going forwrd but no reverse. It is possible. The low/ reverse clutch isn't needed to go forward.

Posted on Apr 02, 2009

csmock132
  • 4669 Answers

SOURCE: 4l60e reverse problem

Is reverse the only thing you loose? 1-2-3-4 O.K

Posted on Apr 05, 2009

emissionwiz
  • 76132 Answers

SOURCE: 95 GMC Jimmy 4L60E no 2nd or OD 4L60E

do u have any trouble codes for the trans? u need to find out to see if a shift solenoid (possible 2-3) has failed.

Posted on Apr 15, 2009

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Diagnostic trouble code P1870 (Transmission Component Slippage) is a General Motors-specific code whose set parameters are determined by transmission type and engine size. The PCM monitors and compares engine speed to vehicle speed after the converter clutch has been commanded ON in either high gear or Overdrive. Should the expected rpm ratio exceed predetermined parameters, DTC 1870 sets. And upon doing so, the PCM elevates the transmission main line pressure and stops converter clutch apply.

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