Question about 1995 Jeep Grand Cherokee

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While driving my jeep seems to be shifting gears the rpms rev up and then goes back down almost as if surging I changed speed sensor as a guess so far but did not work?

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2 Answers

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  • Jeep Master
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Is the engine or service light on, any stored codes, any recent work done, bad gas did you just fill up?
check link below, sounds similar to your issue, worth a look

Jeep Grand Cherokee 4 7 V8 Idle and RPM surging

Posted on Jan 24, 2016

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  • Jeep Master
  • 20,706 Answers

Old 1995
we need vastly more symptoms then that,sorry
if the engine surges, that is first. (surges in 1 gear)
but if a transmission down shifts that is normal, rpm rises
(after all its a lower gear) (higher numeric ratio)
find any machanic in town
ask him test drive it.!
10 min.later he wilt tell you
its trans issues.
or its engine, super easy this is driving.

seems you can not, and learning is 1hour in car class..or 10x that lacking facts of drive train functions.


stop guessing. why spend cash on a useless sensor now.
spend cash on $1 shop diagnosis and WIN.
i promise !

or get it scanned.
and post all those DTC errors. P0700? and more.

Posted on Jan 24, 2016

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Posted on Jan 02, 2017

Anonymous

  • 55 Answers

SOURCE: fault code P0720

code po720 is the output speed sensor malfunction

Posted on Jan 29, 2009

Richard Scordino

  • 6982 Answers

SOURCE: 02 jeep liberty won't shift into 3rd or 4th gear.

Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.

Posted on Mar 16, 2009

Anonymous

  • 1 Answer

SOURCE: 2004 jeep grand cherokee idling problem. Revs motor 200 to 500 rpms higher while driving.

I had the exact same problem on my 04 GC. I put some Techron Concentrate Plus Fuel System Cleaner in from Wal-Mart and it seemed to fix the problems right away. Let me know.

Posted on Jun 01, 2009

Anonymous

  • 1 Answer

SOURCE: My jeep will drive normally

maybe the speed sensor on the transmission monitors transmission speed and sends info to computer to control shifting not sure if this is helpful

Posted on Jun 22, 2009

Anonymous

  • 295 Answers

SOURCE: Transmission Troubleshooting 1992 Jeep Cherokee

Check the trans fluid level first. To do this have the car running at operating temp check the level if low adjust to proper level and recheck. If thats not it I will help u trouble shoot it further. Sounds like a bad torque converter.

Posted on Jul 20, 2009

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2010 Jeep Wrangler unlimited sport extreme shudder at 40 mph- if I press the gas-pedal and get the RPMs to rev, the shudder ceases, only to return once I am back down around 38 mph-41mph.


which engine the 3.6? v6?
that shudder is called MISFIRE.
get a tune up yet, even $1.49 spark plugs?
no its not the trans,
if it dont slip, its not trans, (see RPM races? that is slip or too low gear)
if it shifting to the right gears, its not the trans can you count them?
is the CEL lamp glowing or flashing driving, is yes, that means
scan me now. in fact scanning while it shudders, is like (magic)
why start guessing, do a tuneup,
then scan it.
if its is misfire the PCM will tell you what cylinder misfires.

are your spark plugs 6 years old, if yes, why?
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I have a 1999 jeep cherokee that has intermitant transmission problems 1)shifting up it wind out to 2k-3k before shifting 2) at higher speed it feels as if it slips out of overdrive rpm increase but speed...


It will shift out of overdrive upon increasing throttle , pulling hills and so on. Your overdrive probably kicks in around 35 to 45mph and kicks back out as you increase throttle. Electrically controled speed sensor to control the response. Overwise the engine would bog down to a stall. Over drive is just that. It changes the gearing ratio to over drive meaning less then final gear 4 to 1 down to 4 to 3 etc more direct drive ratio to lessen consumtion of fuel with less stress on engine. Have shift speed sensor adjusted. Don't drive in overdrive in city if most driving is under 45mph

Mar 09, 2010 | 1999 Jeep Cherokee

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Engine will rev. No drop in speed, no increase in


likely what you are seeing is the first signs of slipping. If permitted to continue, likely it will get worse and you will then lose a bit of speed when it happens. In warmer weather the trans runs a bit hotter and will react to that. If you cannot hear the revs increasing but the tach says they are, it's also possible that for some reason the tach isn't reading correctly. Any good tech should be able to tell the difference. Problem I have is that I'm here and can't drive it to give you a "definite" on either.The only way to verify this yourself would be to attach an external tach to the engine and compare the rpms of the one in your dash to that one.

Sep 19, 2009 | 1998 Jeep Grand Cherokee

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Runs first gear to max rpms before shifting.


You probably have a bad governor pressure sensor and solenoid.The pressure sensor is what normally goes bad ,but from vast experience,i replace both of them together and change fluid and filter.

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96 Jeep Cherokee RPM Surge While Driving


If the problem began before you changed the plugs that they are likely OK...Some engines "like" certain brand plugs better than others. You may have a weak ignition coil. Poor spark will generally show up at higher rpm's. Spark should be blue and have good "snap" to it and should easily bridge a 1/4" gap or better. If fuel was contaminated, it should show up at lower rpm's as well. System cleaners sometimes work but often are added far too late to do any good. (tank can hold up to a gallon of water without noticing it.) I use 3oz of acetone and one oz marvel oil per 10 gallons of fuel about once a month...cheaper and more effective than most cleaners. (and does not "melt" gaskets and seals as legend has it) The vehicle speed sensor can also give you problems but needs testing to determine if it's got any problems.
It's difficult to diagnose by remote control, but I hope you benefit form something here!

Jun 12, 2009 | 1996 Jeep Cherokee

1 Answer

The auto gear not changing properly, but gets hook at gear 2


Have speed sensor and control module checked. Try not to run engine up to 5k it's not good for it. Can you shift manually through the gears?

Apr 08, 2009 | 1996 Jeep Grand Cherokee

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My jeep will drive normally until i feel the automatic transmission switch into second gear. Once the gear changes, the rpms rev up but there is no power going towards the wheels


maybe the speed sensor on the transmission monitors transmission speed and sends info to computer to control shifting not sure if this is helpful

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