2008 dodge caravan 31k miles. I devevelped a drining hum.

First, I'm not a Dodge Mechanic,
* I had a 2001 Caravan with the same problem.
* Sorry, but your transmission is bad. No way around this other than to change it. I was offered a rebuilt trans for a total of $2,300 (Hawaii). New ones runs $5K so I figured (2008) that the caravan was not going to last another 10 years (came with a 5 year warranty) I could live with only 5.
* I've found the caravan and similar mini vans all has trans problems.
* Find yourself a reliable trans shop and have it replaced.
* By the way. My nephew is driving the caravan as of 2018. Still good. (well the trans is. Ceiling cloth hangs, radiator was replaced 2016, Water pump 2017.......)
Aloha, ukeboy57

Remove the transmission pan, change the tranny oil filter & adjust the low-reverse band. Any chilton or haynes manual gives the tolerances & step by step procedure to effect repairs. You will need approx. 7 qts. of tranny fluid. Hope this helps. Good luck!

Lube Guard makes a friction modifier additive for transmission fluid that requires it. You can find it at major auto parts stores. Go to Lube Guard. com and check it out.

Verify that your trans fluid is at the correct level. When if at all was the trans last serviced?

If fluid is low, try bringing it up to proper level with Valvoline ATF+4 fluid. You need to used either fluid from a dealer, or the valvoline brand which is approved by Dodge.

90k kms is about 60k miles, so yes I would recommend a trans fluid flush and refill, not just a trans fluid and filter change. when you drop a trans pan to change the filter you are only replacing at most, one third of the trans fluid. the other two thirds stays in the torque convertor. chrysler is also now using ATF+4 synthetic trans fluid(recommended).

the cause of this is either low fluid in the trans or a leaking internal seal in the trans, this causes a loss of hydraulic pressure and then the resaulting slippage

the whistling sound might have been the torque convertor not a trans guru but i had a caravan that did that we replaced the torqueconvertor if it has low miles youll be good to go if it has over 100000 then be carefull

Yes it's a bad seal and most likely the side bearing to the trans axle is bad too. Once the bearing has play, it vibrates and causes the oil to leak though the seal. Note: if one side went bad the other side is soon to follow since they have the same amount of miles on them. Might as well change both side. Good luck and hope this helps. Keep an eye on the transmission fluid level, don't want to burn out the transmission.

It depends on the mileage. You should change hoses, belt(s) and coolant at least every 3 years. Change trans fluid and clean filter every 30,000 miles. Change oil every 3,000 miles. Check the air filter regularly. EGR valve is a 60,000 mile replacement I believe.

If you don't have an owner's manual and like to DIY, get a Chilton or Haynes repair guide. Check the brakes at every rotation - I use 5,000 miles as my guide.

If it's red, it's transmission fluid. Coolant would be green. Check the fluid level, don't let it get low, Chrysler minivans are prone to transmission troubles, and low fluid levels over time will ruin a a transmission. And be sure not to overfill, it's just as bad for the trans. Have the leak checked out and repaired, good luck