Last post on Nov 07, 2013 at 3:04 PM
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Chrysler Town and Country, Dodge Caravan, Plymouth Voyager, Chrysler Grand Voyager, Dodge Grand Caravan, Transmission, Van
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#1035 of 2083 Re: 1998 Grand Caravan transmission problems.... [truthseeker2]
Mar 04, 2006 (7:22 am)
Ummm, they ALL buzz, going into gear, coming out of gear and shifting from gear to gear. I'm a runner and a cyclist and I can tell when an automatic equipped FWD Chrysler/Dodge/Plymouth is approaching me from behind if I'm approaching an intersection or just leaving one simply from the buzzing noise the transmission makes as it does its thing. Please be assured, what you are hearing is simply normal operations for this type of transmission.
#1036 of 2083 Re: 97 Dodge Grand ES 3.8 liter AWD [97dodgegrandes]
Mar 04, 2006 (8:22 am)
Definetly chage the fluid. The Wynn's flush scares me though. What fluid do they use to flush it with? Will all of that fluid disapear? A '97 was originally equipped with ATF+3. I would use ATF+4 which is backwards compatible to ATF+3. Do not get this service at a "quick lube" place, as they use a "one size fits all" fluid with an additive to make it "just like" ATF+3/4. Personally, unless you get this done at a dealer, I would be present when they re-fill your transmission to insure proper fluid is being used. Ask to see the pan after it's dropped to check amount and type of debris on pan magnet.
Mar 04, 2006 (10:28 am)
Does anyone know the RPM range for fourth gear in a 3.8 T&C minivan?
For example: cruising on level highway at 60 MPH - what is the average RPM. I just had a transmission oil change and it now appears that I am running at a higher RPM than before. Cruising at 60 MPH level highway -- I am at 2200 RPM, I recall being under 2,000 RPM. Any thoughts? Thanks.
#1038 of 2083 Re: 4th Gear RPM [goodbuys28]
Mar 04, 2006 (11:18 am)
Three separate thoughts:
1) What model year are you talking about? We have both a 1998 and a 2003 with the 3.8, and off the top of my head, I cannot remember if they display the same RPMs at any given speed or not.
2) When you saw the 2200 RPM reading, was the van warmed up? I ask because given my current work location, I'm up to my normal 65-70 mph cruising speed within a minute and a half of engine start. What I've noticed is that for the first few minutes at speed my RPMs hover somewhere over 2500 and then drop to more like 2200. Clearly what is happening is that once the transmission is warmed up the Torque Converter locks up and drops the RPMs accordingly.
3) Who performed your transmission oil change? Are you absolutely sure that the proper transmission fluid was used? I ask because I've heard that if the incorrect fluid is used the various computer controlled clutches will enter a never ending engage/disengage/engage cycle (and destroy the transmission in fairly short order). Assuming that is the case, then logic would suggest that the RPMs would rise somewhat given the constant slipping of the clutches.
#1039 of 2083 Re: 4th Gear RPM [shipo]
Mar 04, 2006 (3:10 pm)
Thanks for the reply. The T&C is 2001. The engine was warm (10 min. of driving). I may need to take it on a longer drive to see if the torque converter is locking up.
The trans oil was changed at a Chrysler dealership. Hopefully, they used the correct oil. I did not double check but I expect that they should know their products.
I recall that the normal RPM in 4th was less than 2000. I am wondering if other people experience the same or is cruising at 2200 normal. Also, can you feel when the torque converter locks up?
#1040 of 2083 Re: 4th Gear RPM [shipo]
Mar 04, 2006 (3:17 pm)
I took our 1998 out this afternoon to warm up the oil prior to changing the oil in both of our vans (Mrs. Shipo had already warmed up the 2003 while running errands), and remembered to check the RPMs at 60 mph. Finding a flat place around here where I can do 60 is a bit problematic, however, each of the three times I was able to stabilize the speed at 60 (using the cruise control) I was showing about 1850 RPMS.
So, for a 1998 DGC with the 3.8 liter mill, 1850 is the number.
#1041 of 2083 Re: 4th Gear RPM [goodbuys28]
Mar 04, 2006 (3:22 pm)
"Also, can you feel when the torque converter locks up?"
- Feel? No.
- Hear? Hmmm, maybe, depends if I've got the audio system on loud or not. If it's off or low enough, I can hear a slight drop in the note of the engine.
- See? Yes. There is a noticable 400 RPM drop when the torque converter locks up.
#1042 of 2083 Re: 97 Dodge Grand ES 3.8 liter AWD [97xpresso]
Mar 06, 2006 (5:00 pm)
I double checked my owners manual for 97 Dodge GC, AWD. It has ATF+2 all over the cover and inside for transmission and overrunning clutch. I'm wondering if ATF+3 supersedes the printed material that I have?
Question: For 97 AWD, is the overrunning clutch a concern? Prone to failure? Should I service it as often as the transmission?
??? Is my failure described in first message a shift pack issue?
#1043 of 2083 Re: 97 Dodge Grand ES 3.8 liter AWD [97dodgegrandes]
Mar 07, 2006 (9:08 am)
Your dealer probably dosn't even carry ATF+3 anymore, and definetly won't have any +2. ATF+4 is a superior fluid and is backwards compatible to the older fluids. I don't know much about the AWD system, but I would follow the maintainence schedule for "severe service", when it comes to the transmission, in your owners manual. ATF+3 is still available in parts stores if you wish to do the job yourself, but I would go with the ATF+4, which may not be available in your local parts store. Other posters always try fluid replacement first, before trying more expensive fixes.
#1044 of 2083 Re: 4th Gear RPM [shipo]
Mar 07, 2006 (6:55 pm)
Thanks for checking. My wife also pointed out to me the problem in the downshifting - it was loud and you can feel it so we took the van back to the Chrysler repair shop today.
They were able to fix the problem. They told me that after the transmission oil change, when the car was started the computer sensed the low oil pressure in the transmission and put the trans in default emergency mode, thus causing the lock-up to cease and abrupt shifting in the gears. After reprogramming the computer, transmission problem was fixed.
I am glad for the repair, I just wish that I wouldn't have to take it back twice for a simple transmission oil change at a dealership.