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Check low on the dash by the driver's left knee. There should be a button labeled as such to turn on and off this function of the transmission. It's for icy weather.
The switched labeled SGS stands for "Second Gear Start". This allows you to start off in second gear when accellerating.
There is a switch on the dash or shift console that turns this feature on and off. When it is on, the light on the dash comes on, and the transmission leaves out first gear, starting in second from a dead stop. This is great for icy winter conditions.
Second gear start was a feature on a few GM car models in the mid 90's. When engaged, the car will start off in second gear instead of first. This is why the car is slower while turned on. There is much less torque output starting out in second gear, providing improved traction while driving in icy and snowy conditions. There is a button or switch somewhere that turns it on and off.
it probably has what some call a granny gear or a towing gear. it is geared way down to make it easier to take off from a stop when pulling a load. as to can it be changed, porbably not but when you take off just start off in second gear.
Possible, but it would be worth your time and money to have the transmission computer checked for codes. If it sticks in second it is because the computer has set a code and went into safe mode. The code will point you to the faulty part.
Worn out gears in a transmission will cause the transmission to slip out of gear. The gear may be war only on one side, causing the transmission to work properly. At times.
If the transmission doesn't see the right fluid pressures it will stay in second gear to allow you to get it off the road without tearing itself up.
This problem could be the linkage in the transmission. The transmission could also be going out and would need replaced.
Check the govenor gear. Pull the tin govenor cover off and see if the plastic gear is stripped. Cover is located on the passenger side near the tail. Part is easily replaced and should come with directions.Good luck.Jerry
For a normal passenger car, it would be first gear. While you might be able to move from a dead stop in second gear, this puts a lot of strain on the drivetrain, and causes excessive wear. In commercial vehicles (tractor trailers, dump trucks, etc), and dependent on what transmission you have, and what the vehicle weight is, you can often start off in second or third gear... you could often even start off in fourth or fifth, but again, the matter of excessive wear on drivetrain components comes into play.
The biggest problems of why a jeep wont go into third gear is either that the shifting fork for third gear is worn or bent or the sycronizer or gear itself is worn out and needs to be replaced. Once you take the top of the transmission off where the shifter is located you can see the whole transmission gears and inspect the shifting forks. A general rule of thumb is to make sure the transmission is in second gear before taking the top off. This will make it easy to take off and rerattach the top of the transmission cover and align the shifting forks.