My z71 says do not dyno test !
03-08-2005, 06:32 PM
#21
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Originally Posted by LX331
Manuals are shift on the fly. I prefer the manual over the electronic shift.
same here. i had both. never had problems with the manual floor shift.
i did however have many problems with the push button
03-08-2005, 09:01 PM
#22
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autotrac and dyno
Originally Posted by KeukaZ71
same here. i had both. never had problems with the manual floor shift.
i did however have many problems with the push button
i did however have many problems with the push button
hey guys, i am a GM auto tech and i dyno these trucks all the time for emissions imspections...the sticker is on there due to the autotrac possibly engaging while on the dyno and ripping the car off and going through a wall...
its all a big liability thing and it required by GM and the state to be on there...you can put it in 2HI and have no problems worrying about anything happening.
just my .02
03-09-2005, 01:26 AM
#24
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I never have been able to get a good answer on this... I have electric/electronic 4WD on my truck with an "auto" mode (but also (obviously) 2 high, 4 high, and 4 low). Is this autotrac or not?? I am under the impression that it is not.
03-09-2005, 01:42 AM
#26
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Originally Posted by stone150
i might havbe a different deffinition of shift on the fly, can you shift it in to 4wd while the truck is moving like the pushbutton?
All recent 4wd GM trucks have the shift-on-the-fly capability, whether or not they have autotrac or the push-button 4x4. That is, you can switch between 2HI and 4HI at any reasonable speed.
All GM trucks require you to be going <3mph and in neutral to engage/disengage 4LO.
The "AutoTrac" stuff provides a fourth drive mode, in addition to 2HI, 4HI, and 4LO. On an AutoTrac truck you can switch between 4HI, 2HI, and the "Auto" mode at any speed. AutoTrac will only engage the front drive system when the rear wheels begin to lose traction. The AutoTrac mode can be used on dry pavement, unlike 4HI.
"Push button 4x4" is just an electronically controlled 4wd system...it does not necessarily provide an "autotrac" 4wd mode.
03-09-2005, 01:43 AM
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Originally Posted by Soquel
You have an autotrac transfer case, All z71's do.
03-09-2005, 05:49 PM
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yeah i have seen a quite a few Z71's with the manual transfercase, so can you shift into 4hi from 2hi while driving down the road at say 30 mph with the manual transfercase?