QuestionI have a 99 Dodge 1500 truck, 105 K miles, 5 speed manual trans, it has started jumping out of second gear. Second only and only when the engine is cold. After a couple of miles or on a warm day, no problem.
AnswerHi John,
Sorry to say I don't have any detailed knowledge about manual transmissions behaving in this manner but you might try ckecking out the adjustment of the gear shift lever. Here are some thoughts from search I did about manual transmissions jumping out of gear:
"Jumping out of gear is another common complaint with transmissions that have high mileage. If the manual transmission jumps out of gear and into neutral you should first check the gear shifter and its attaching linkage for looseness or damage.
Another common cause of a vehicle to jump out of gear would be damaged or broken transmission and engine mounts. A visual inspection of these mounts may not reveal a problem. sometimes you have to pry up on them to see if they are in tact.
A worn input shaft pilot pushing or bearing that is pressed into the center of the crankshaft can also cause this type of manual transmission problem. If all of those items are found to be in good condition chances are excessive internal clearances are the cause of the transmission jumping out of gear."
Check these out to see if any might apply.
Roland
