Question about 2001 Jeep Grand Cherokee

1 Answer

Jeep drops out of over drive then trans over temp light comes on. serviced transmission, filter ,5 quarts of atf-4. added transmission fluid cooler takes longer but still drops out of o/d and still get over temp light .suspect trans lines may be partially blocked does anyone know of any internal problems

Posted by tmorris64 on


1 Answer

SFC Bam Bam

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Contributor
  • 33 Answers

If you have a high mileage vehicle, or you have purchased this Jeep second hand, it could be a clogged cooler that is causing the overheating issue. How did the fluid look when it was drained?
Pull the lines off at the transmission and at the cooler. Use compressed air with a rubber tip to blow out the cooler lines. If the lines are not clogged up, then focus on the cooler itself. If it is the original cooler the factory installed, it may need to be replaced just based on age. Hot and cold temps will cause ANY material to fatigue.
Is the cooler clean (no debris between the fins or behind the cooler)? If you live in a dusty environment, this could cause enough heat build up.
To increase the cooling efficiency, you can move up a size on the cooler and you can use some spacers to increase the gap between the back of the cooler and what ever it is mounted next to. More air behind it will help it cool a little better.
Since it is a Jeep, if you have off road lights or a winch mounted in front of the cooler, you may want to consider mounting it someplace else to maximize the air flow it receives.
Other than cooler woes, I don't have many more guesses. If it were electronic you may or may not be getting a Check Engine Light. Might want to call a local dealership or a transmission shop to see if they have seen anything like this before.

Posted on Jan 07, 2018


5 Related Answers


  • 50 Answers

SOURCE: Service 4 wheel drive

The service 4 wheel drive light comes on because there's a problem. The biggest causes of this I've seen are a software glitch in the final drive control module which the dealer can fix by reprogramming and the other is usually the electric actuator on the front axle housing. The only light that comes on by a timer is the one that says, "perform service" in your overhead console or odometer.

Posted on Apr 15, 2009


Roberta Smith

  • 5158 Answers

SOURCE: 88 Jeep Cherokee Transmission Fluid Leak

you need to tighten those fittings with a wrench... if they still leak... remove them and wrap them with a couple turns of "teflon tape" the kind they use for plumbing. the clamps you should use are hose clamps of the same type that you use for radiator hoses... you will note these can be tightened with a socket.... you really don't need to over tighten them but fairly snug... transmission fluid has quite alot of pressure.

Posted on Apr 19, 2009


  • 1392 Answers

SOURCE: 1994 Jeep Grand Cherokee Laredo. Can't find a

Go to a parts store and get another hose clamp. They are like 50 cents.

Posted on Aug 14, 2009


  • 236 Answers

SOURCE: Bottom trans cooler line damaged: How could this

I can't answer all your questions, but the lower trans cooler line is vital in keeping the transmission fluid temperature not to overheat which will burn up the transmission if left ignored.
Limited slip is the rear differential and how it works (the tube in between the rear wheels with a large round thing in the middle) During normal driving the right rear wheel is the prominent wheel that allows your vehicle to go forward, in slippery conditions if that wheel starts to spin clutches on the inside of the rear differential will allow the left rear wheel to also start to spin so both rear wheels now are turning which helps getting your car out of that slippery condition. (in theory)

Posted on Oct 13, 2009

Testimonial: "very helpful"


Johnny Brown

  • 5763 Answers

SOURCE: jeep 2002 Transmission Over-Temperature

may have a bad temp sensor for trany oil, or the cooler or lines may be restricked,the oil temp has to be checked when the light comes on, this will tell if its really hot or the sensor is bad, start there.

Posted on Jan 03, 2010

Testimonial: "Thanks, for your take; it definitely sounds very possible thats its a bad sensor, oil appears to be ok and all fluids are ok too, bringing it in"

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Do I need to replace solenoids or do something else?

You have air in the system once the air goes away the codes should disappear

Jan 03, 2016 | Jeep Cars & Trucks

2 Answers

How much trans.oil does the trans.hold

On 1999 Jeep Cherokee 4WD 4.0L MFI 6cyl ...
With Transmission model AW4:
-Service change only - 2 quarts.
- Total refill - 8.2 quarts.

With 30RH transmission: Pennzoil Multi Vehicle ATF

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 08, 2012 | 1999 Jeep Cherokee

1 Answer

Can anybody let me know how much trans fluid is needed when changing the filter on a 1999 f-450 trans ?

I've done this alone. It's easier with a second person, and sometimes helps prevent spills. Things you need to get started: The E4OD and 4R100 transmission system holds almost 18 quarts of ATF, and you must waste a couple of quarts to be sure you get it all purged and replaced, so buy 20 quarts of MERCON ATF [For the 4R100, use MERCON V]. You may use either conventional or synthetic, as long as it meets the above requirements.The 4R70W transmission system holds about 14 quarts of ATF. The 4R70W uses MERCON V, and the MERCON V can be used on older 4R70W transmissions that were factory filled with MERCON. I replace the transmission filter every other fluid change. Note that Ford does not recommend ever changing the filter. I've opened filters with over 300,000 miles that were not even close to being clogged. Don't buy a new pan gasket. The original is reusable. A 10 foot length of clear tubing and one hose clamp, sized to fit over your cooler hose. There have been different size cooler lines over the years, so check before buying! If you don't already have a special funnel that fits into the transmission dipstick tube, then you will need one of those, too.If you are changing the filter, drain the pan if your pan has a drain plug. If you are not changing the filter, jump to step 4. If you don't have a drain plug, go to step 4 to pump out the pan, preventing an ATF shower! Return here after step 4 and one pass through step 5a. Remove the pan and clean the pan and gasket, including the magnet on the bottom of the pan. Fuzz on the magnet is normal, that's why it is there!Change the filter. It just pulls out, there are no bolts that hold it. It is held in place by the pan. Make sure that the O-ring is removed, too. Sometimes it does not come out with the filter.Replace the pan, using the reusable gasket. At this point you can drain the torque converter. Some people think it is necessary, but I don't. Running the engine in the next steps will pump the fluid out of the torque converter. If your transmission was built after August 2001, you don't have a drain plug in the torque converter.To drain the torque converter remove the shield (or the rubber plug in some models) and turn the flywheel until you see the drain plug. If you also drain the torque converter, then the old ATF will not come out the return line until after the torque converter has filled.If you drained the pan, pour new ATF into the filler [dipstick] tube until you have added about as much as you earlier drained from the pan. At this point overfilling by no more than one quart won't hurt anything.Disconnect the transmission-fluid return line at the transmission - from where the ATF returns to the transmission from the cooler. This is the line towards the rear of the transmission. Clamp the clear tubing over the line that you removed from the transmission. This is where the fluid comes out.This is where the second person comes in handy. One person starts the engine, while the other holds the line over the drain bucket. A clothes pin can replace the person holding the line in the bucket. Run the engine until you see some air in the clear tubing. As soon as you see air shut off the engine. Refill through the dipstick tube with the same amount as you just pumped out.NOTE: If you drained the pan and the torque converter, fluid will not run out until you fill the pan a second time. Run the engine for 30 seconds, then stop and add six more quarts.Repeat step 5 until you have added 19 quarts with of new ATF to the system with an E4OD or 4R100. Repeat until you have added 13 quarts with the 4R70W.At least one time while the engine is running move the shifter through each position from P to 1, pausing about 5 seconds at each position. This will change some fluid that would otherwise be trapped in the valve body, accumulators, and clutches.Remove the clear line and reconnect the cooler line to the transmission.Check the fluid level and use the last quart to top off.Properly dispose of the used transmission fluid. Congratulate yourself! And your engine starter/killer person.

Oct 04, 2011 | 1999 Ford Super Duty F 450

1 Answer

Is 7 quarts of transmission fluid too much for an 05 ram 5.7 hemi engine?

Is your trans an auto trans? If so, you should have the 45rfe trans which would take 5-7 quarts to refill after a filter change.

Use only Chrysler or Valvoline ATF+4 fluid.

Sep 03, 2010 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

A/t oil temp light come on 1999 isuzu npr diesel

Check your trans fluid and inspect for leaks asap. If level is good and leaks are none to minimal, I would suggest a new trans cooler. Your current one could be clogged.

Nov 23, 2009 | 1992 Isuzu Trooper

2 Answers

What kind of ATF goes in my 1992 cherokee?

Use ATF+4

Do not use Dexron or Mercon

Aug 08, 2009 | 1992 Jeep Cherokee Sport

2 Answers

How much transmission fluid is required for a change?

Depending on what type of vehicle it can take as much as 16 to 18 quatrs of ATF , if you are completely flushing the unit. if you are just dropping the pan and draining it without flushing the torque converter then 12 qts. should be on the safe side, make sure you do not over fill or under fill the transmission, check level while trans is in nuetraul with parking brake set, wheels chalked. please rate my help , thanks

If you are dropping the pan be sure to install a new trans filter and pan gasket..

to have the unit professionally flushed by machine can cost as much as $ 200.00 with flush and filter change...

Aug 05, 2009 | 1999 Jeep Grand Cherokee

2 Answers

98 toyota camry transmission service.

You can drain and fill your trans. It will take 2.5 -3.0 quarts of DEX III trans fluid....goes in the fill tube. Or you can get said transmission flushed which changes all fluid including torque converter.....about 15 quarts. Way more thorough.

Jul 12, 2009 | 2002 Toyota Camry

1 Answer

How do I change the automatic transmission of a Toyota corolla 1995 1300 cc Where can I find the plug? Thank You

To replace all fluid you should first purchase a filter & pan gasket set for about $20. You need a good set of ramps & chocks. Pulll the pan and drain (this is about 1quart). Replace the filter and clean the pan, if necessary with a small amount of kerosene and rinse out with atf. There may be a magnet with a peanut-butter like paste (tranny wear), clean that too and replace. Replace pan being very careful to follow pan tightening sequence & torque. Do not overtighten! Take off ramps. Remove hose from of the trans cooler beneath the radiator leading back to the trans. Have a trans funnel in place in the dipstick filler tube. Start engine in P and have a helper pour in trans fluid at the same rate the fluid is spat out of the hose. This is very critical, do not let it run dry because you are already a quart low from the pan cleaning! the rate is about 15-seconds per quart but you should time how long it takes to fill a quart from the cooler line for best results. stop engine when color of fluid being spat out changes to new fluid. check fluid a couple of times afterwards at different temps to be sure. Good luck. Use synthetic ATF for best results (check the bottle for compliance with manuf)

Dec 11, 2008 | 1995 Toyota Corolla

3 Answers

Automatic transmission

Fluid can leak out of the driveshaft seals, the input shaft seal, the transmission pan gasket, the torque converter or the ATF cooler and line connections. If the fluid level gets low, the transmission may be slow to engage when it is shifted into drive. Gear shifts may be sloppy or delayed, or the transmission may slip between shifts. If the fluid level is really low, the transmission may cause the vehicle to not go at all.fluid level should be checked when the fluid is hot with the engine idling, the parking brake set and the transmission in Park. If fluid is needed, add only enough ATF to bring the level up to the full mark. Do not overfill because doing so can cause the fluid to become aerated, which may affect transmission operation. If the dipstick reads low, the transmission is probably leaking. So look underneath to see where the fluid is going. If there are no visible leaks, check the radiator for ATF in the coolant. The ATF cooler inside the radiator may be leaking and cross-contaminating the fluids.
You should also check the condition of the fluid. Some discoloration and darkening is normal as the fluid ages, but if the ATF is brown or has a burnt smell, it is badly oxidized and needs to be changed. Varnish on the dipstick is another indication of worn out fluid.
You can also do a "blotter test" to check for worn fluid. Place a few drops of ATF on a paper towel and wait 30 seconds. If the spot is widely dispersed and red or light brown in color, the fluid is in satisfactory condition. But if the spot does not spread out and is dark in color, the ATF is oxidized and should be changed.
Many transmission experts say most transmission problems can be prevented by changing the ATF and filter regularly for preventive maintenance. How often depends on how the vehicle is driven. For some vehicles, this might be every 30,000 miles or two years.
The harder the transmission works, the hotter the fluid runs. The life of the fluid drops quickly once its temperature gets up above about 200 degres F. Installing an aftermarket auxiliary ATF cooler that is parallel to the OEM ATF cooler is recommended to keep fluid temperatures down on vehicles that are used for towing or are driven hard.
ATF also becomes contaminated with normal wear particles from the clutch plates, bushings and gears. The filter will trap most of this debris before it can cause problems. But many older Asian transmissions only have a plastic or metal screen that does little to protect the transmission against internal contaminants and nothing to keep the fluid clean. On these vehicles, changing the fluid is the only way to get rid of these contaminants.
When adding or replacing ATF, use the type specified by the vehicle manufacturer. GM, Ford, Chrysler, Honda, Mercedes and others all have their own specs for ATF. There is no such thing as a "universal" ATF that works in all transmissions. Some fluids meet a variety of specifications, but cannot meet them all because of the different friction additives that are required.
Ford has three automatic transmission fluid specifications: Type F (a non-friction modified formula for most 1964-81 transmissions), Mercon (a friction modified ATF similar to Dexron II for 1988-97 transmissions), and Mercon V (Fords latest friction-modified formula, introduced in 1997).

Oct 12, 2008 | 1994 Honda Civic

Not finding what you are looking for?
2001 Jeep Grand Cherokee Logo

Related Topics:

63 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides