2000 Isuzu rodeo won't shift into 3rd gear never had any signs of the Tranny going bad jusy woke up got in my truck an it started .ot will sometimes go into 3rd gear an so forth but 90% od the time iit won't go .

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2000 Isuzu rodeo won't shift into 3rd gear never had any signs of the Tranny going bad jusy woke up got in my truck an it started .ot will sometimes go into 3rd gear an so forth but 90% od the time iit won't go . no leaks but prior to my truck acting up my engine made a weird winning sound not load or hardly noticeable but only to someone whom drive it all the time never heard it make that sound an likw i saI'd never had any signs of it going bad b4 so curious to know if anyone has experience this b4 what they had to do to fix to me i jutst feel it's a minor situation that needs fixed i hope someone can help it's an automatic 2000 lotsa miles