Question about 2005 GMC Envoy
While driving at highway speeds it hesitates, rpms go down alittle. tranny shifts fine
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: 2005 Mazda6 tranny ****
1. some mazdas had a PCM/TCM update to resolve 1st to 2nd shift shock. the only one who can update the is the dealer. maybe covered under 5 year 100,000kms powertrain warranty.
2, have you ever had the transmission fluid replaced? it could be dirty, burnt, etc.
if it was replaced, maybe it was replace with fluid other than M5 fluid. different fluids have different properties (thickness etc) which could cause serious problems if left.
I would recommend taking it to the dealer for the update and a transmission flush (not a drain and fill) using a flush machine.
Posted on Jun 24, 2009
if the fuel filter hasn't been changed do so, if the fuel filter is ok and has been changed out due to this problem you will need to monitor the fuel pressure under a load and make sure it doesn't drop below 45 PSI, it it does you will need to replace the fuel pump and the fuel filter. U also do say if you have a check engine light or have had the system tested for trouble codes that may be triggered by this loss of power problem.
Posted on Sep 08, 2009
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