Question about Infiniti J30

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J30 won't shift gears

My j30 won't shift gears. Starts in 2nd gear and stays there. Never shifts down to first or up to 3rd or 4th. The battery was disconnected and the a few sensors were disconnected(knock and oxygen and one that is located beside the oil filter if you are under the car looking up). The car had to be jumped to get it to start again (which was a couple days after the sensors and battery were reconnected). Voltage to the battery was low, but after the car was started, the alternator light flashed rapidly 4-5 times and then went off. The reason the sensors were disconnected was to clean off oil and sludge that had built up on the engine and component parts. What could be wrong????

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  • Stacy B Jan 03, 2014

    Will the car not reset the onboard codes after driving it for a while?

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  • Infiniti Master
  • 794 Answers

When the car was jump started, you may have caused a voltage surge that affected the on-board computer module; and/or the computer module for the transmission.

Another possibility, once you disconnected your battery, you may have disrupted the on-board memory codes- such as the transmission's adaptive settings- so you may have to bring the car to the dealer repair shop or a transmission shop. Even if you take it to a local auto repairman, make sure he/she is an ASE certified mechanic.

Posted on Jan 03, 2014

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6ya6ya
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Posted on Jan 02, 2017

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godspeed808
  • 125 Answers

SOURCE: 98 Civic Auto Trans Slippage

you need to replace clutch pack for that gear can be ordered seperately from parts store or dealer if you want to save money call peach street auto recycling at 1800-365-2341 for a warrantied used one! also might be time for change trans filter and fluid filter could be slightly clogged but I lean towards clutch pack I replace these alot on Hondas

Posted on Feb 04, 2009

ourhowse
  • 2007 Answers

SOURCE: 2004 mazda 3 transmission problem

Check transmission fluid. If that is full, try changing the fuel filter. It could be starving for gas, and trying to shift but can't. It could also be the speed sensor, or shift solenoid.

Posted on Jul 06, 2009

  • 1 Answer

SOURCE: Hang up in third gear loss of power

Hi All

I have a s40 1.9d / 2000 plate,
In the last month or so the car loses revs when changing up to 3rd and 4th gear, I can only get 50 mph max in 3rd gear 80mp in 4th.
The car has just clocked 185,000 miles
Its a great car but a pai at the moment, I've had a service including fuel fillter change added fuel cleaners to the deilsel all to no avail


Any suggestions

Posted on Feb 12, 2010

  • 122 Answers

SOURCE: Shifting problem

TRY TO DRIVE IT SLOW TO NORMAL BUT DO THE MANUAL IF ALL THE GEAR WORK WITH OUT SLIPPING I WOULD SEE IF THERE A CABLE THAT GOES TO THE TRAND THAT WILL ADJEST THROTTLE PRESURE BY MAKING CABLE LONGER OR SHORTER . CABLLE IF IT WORKS DONT DEAT IT CAUSE ITS GETTING TIRED

Posted on Feb 16, 2013

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Sounds like your transmission is in limp mode. This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

The other from what you described, trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Thank you for using fixya and have your Safari scanned for the DTC codes that would indicate what issues your transmission is having to put you in to limp mode.

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1 Answer

Only runs in 1st and 2nd gear and reverse.


This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Trans shifts into gear harshly, car feels sluggish off the line
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1 Answer

Hang up in third gear loss of power


Hi All

I have a s40 1.9d / 2000 plate,
In the last month or so the car loses revs when changing up to 3rd and 4th gear, I can only get 50 mph max in 3rd gear 80mp in 4th.
The car has just clocked 185,000 miles
Its a great car but a pai at the moment, I've had a service including fuel fillter change added fuel cleaners to the deilsel all to no avail


Any suggestions

Jul 06, 2009 | 2000 Volvo S40

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