When i engage d on the auto box the car will hardly pull away on the smallest of slopes, but when i engage the low gears shift it pulls away on any slope or hill ?? my veichle is a 2001 3.1 tubo diesel grand cherokee with the vm engine..
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first is it a stick shift or and auto box.. stick shift will be the clutch. or a part of it best to change the lot in this case clutch and other components in there. you can get a clutch kit with all parts you need. auto it could be the speed sensor or the servo or selector in the auto box. can also be faulty oil in the auto box. or even just to low. you would need to check this.
the idea of being able to change manually in an auto box is that you have more control in snow and ice.
when in snow/ice you should pull away in 2nd gear(stops wheel spin).
you will do NO DAMAGE whatever.....
Probably a vacuum leak. Tranny has to be in Neutral to shift into 4 low, but should be able to shift into 4 high in any gear. The auto locking hubs work off of a vacuum, if there's a leak in the line, they won't engage. If the 4x4 light is on, but the wheels aren't pulling, that's most likely the problem.
That does sound like a linkage adjustment problem.
If that does not work, I'd try a fluid change and filter. But your diagnostics with pulling on the gear shifter is a pretty good indication of a linkage problem.
I have to stop, engage 4H or 4L, and shift into nuetral and then the front gear box will then engage and you can hear it from nuetral and the engine at idle, it will slip into gear, if not, in gear go slow with 4x4 light "on" and while rolling slip into nuetral and then back into D, Some transfer cases will not engage in Overdrive, the D with a circle around it so shift into 3rd gear the one to the right of the D with a circle around it. 4 H has a speed limit, and do not shift into 4L while on pavement or you can do some damage.
well the taking off in second could be a sensor or vacume line...but when you step down on the gas real hard it is suppose to shitf to low that would be your kick down vacume line..
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