Transmission or differential

Tiny
MISHELLEELIE
  • MEMBER
  • 2001 DODGE DURANGO
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 230,000 MILES
So when my car is in four wheel drive it grinds bad.
Now while in two wheel drive I was driving on highway and out of no where rpm's went way up like I was all of a sudden in neutral.
Now I have heard that if my differential goes completely out it can cause this but so can a transmission. I have never had a transmission lose all gears at once though with no warning.
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Saturday, December 3rd, 2016 AT 4:49 PM

5 Replies

Tiny
CJ MEDEVAC
  • EXPERT
Have you (ever) checked the fluid levels in all of the drive train components?

The Medic
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Saturday, December 3rd, 2016 AT 8:06 PM
Tiny
MISHELLEELIE
  • MEMBER
Cj medevac,
Yes, all fluid is full.
Even put in fresh fluid.
Transmission fluid was full as well.
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Saturday, December 3rd, 2016 AT 8:36 PM
Tiny
CJ MEDEVAC
  • EXPERT
To include the transfer case?

The Medic
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Saturday, December 3rd, 2016 AT 8:49 PM
Tiny
MISHELLEELIE
  • MEMBER
Cj
What do you mean. When it was looked at all fluids were good. At this point I don't know if my transmission is out or why my 4x4 grinds
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Monday, December 5th, 2016 AT 3:13 AM
Tiny
CJ MEDEVAC
  • EXPERT
If you are gonna perform these tasks yourself, I suggest you buy a repair manual from an auto parts store or somewhere on our site you can buy an online manual (I don't see it right off, they musta moved it!)

I trust a manual more than I do word of mouth from an individual, Even me, I might overlook something or tell you wrong, a manual is usually the best instruction you can get (along with someone interpreting parts that you do not understand)

Your transfer case and differentials do not have dipsticks, you must remove a fill plug (if fluid runs out, it;s full!) If none runs out, you must top it off.

Your owners manual/ repair manual will tell you what type fluid goes in it.

I'm gonna show you my JEEP CJ-5 Manual tranny and transfer case, your transfer case is similar BUT on the back of your automatic transmission

1) Manual Tranny Green / Transfer Case Orange INSTALLED IN MY JEEP ('hump' cover is removed)

2) My tranny/ transfer case/ skid plate freshly rebuilt ready to install

3) Pic of rear of my transfer case (JEEP) See MY fill hole? (Hope you can see my writing)

4) $5 pump from auto store to install "MY" kinda fluid from under Jeep

5) Pump mounted on my kinda gear oil jug

6) THIS IS A DIAGRAM I GOT FROM "PRODEMAND" OF YOUR TRANSFER CASE!

You really have to stay on top of draining (like an oil change)/ refilling/ topping off ALL OF YOUR FLUIDS AT THE PROPER TIMES OR MILE INTERVALS!

This will greatly lengthen the life of the parts! Not to mention very costly repairs!

A repair manual will have all of the intervals listed on ANY/ ALL parts that need changing, checked, etc. In the Scheduled Maintenance Section.

7) Some of my Jeep Manuals

If you do find your fluid is low/ gone, look for where it may have leaked out. Repair!

If indeed this was a low fluid issue, you may have already caused damage. Then again, maybe you caught it in time! Replenish the fluid and see what happens.

8) "Mr. Jeep" 1977 CJ-5 (39 years old)

9) "Willy" 1946 Willys Jeep (70 years old)

I've pretty much rebuilt both of these, both obtained in 1991, since then, The 1st, is my everyday driver, the 2nd every chance I get!

Generally, I always check my oil and coolant levels every week as per most owner's manuals. I usually OVERKILL my intervals (changing oil sooner than the miles say to, a new thermostat yearly, along with new coolant, etc. Etc.)

Keep me posted on your findings with fluids, the grinding might be the actuator is not fully engaging or other possibilities. Fluids need checking 1st.

Good Luck!

The Medic
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Monday, December 5th, 2016 AT 7:40 PM

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