Question about 2003 GMC Envoy
I have a 2003 envoy 4.2L and I have lose of power on inclines, ramdom misfires, once trans is hot I have no gears and when it cools off their all back. Fluid looks great and no burnt small. What can it be?? please help
Check Ur oil for the smell of anti freeze. if its there check for leaks. your rear head gasket could be out. everything is run by a computer. so scan it.
Posted on Jul 23, 2013
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Posted on Jan 02, 2017
The automatic cars (at least the tiptronics, which came out in 98) require the transmission to be up to a specific temperature, which must be monitored while changing the fluid - this requires VagCom, the VW/Audi diagnostic software (I'm not making this up). I am not sure whether the non-tiptronic cars had to have this as well or if it can be done as any other transmission - best bet is to call a European specialty mechanic and ask them - a dealer will kill you with labor rates. Do not just drain and refill though, without finding out first whether the VagCom procedure must be used.
Posted on Nov 12, 2008
you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps
Posted on Dec 16, 2009
I need a little mor info. But the reason for the being stuck in 2nd gear is because when something goes wrong with the tranny. it goes into "LIMP" mode wich keeps the trans. from shifting out of 2nd when you are going forward. It does sound like your trans. is gone out though.
Posted on Dec 19, 2009
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