Recent Topics
Impressed by Turtle Wax
by DarthDuty
4 minutes 58 seconds ago
Coolant leak 2008 Ford Escape 2.3L
by LoneRanger
16 minutes 43 seconds ago
DDM ******, your warned..
by OtisBlkR1
Today at 07:36 AM
Lexus RC
by Hokiefyd
Today at 06:45 AM
Lint-Free Drying Towel ?
by Merkava_4
Today at 04:07 AM
different size bottles not having the same spec
by moparguy19
Today at 02:12 AM
PERMA-TECH OIL STOP LEAK WILL RUIN SEALS & GASKETS
by yanis
Today at 12:52 AM
Any reason NOT to take low dose Aspirin?
by SumpChump
Yesterday at 10:59 PM
residue on antifreeze cap
by ram_man
Yesterday at 10:58 PM
Spark Plugs
by BlueOvalFitter
Yesterday at 10:51 PM
50s Clinton 2hp Detergent or Non-Detergent SAE 30
by TriMoto
Yesterday at 10:48 PM
50w in a 75-90 application
by Dirtracer_17
Yesterday at 10:42 PM
Newest Members
aceauto, Kazya, Cycle009, Zonker, jahmes143
54143 Registered Users
Who's Online
83 registered (4wheeldog, 1foxracing, ag_ghost, 3311, ARCOgraphite, Al, 6 invisible), 1585 Guests and 103 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
54143 Members
66 Forums
232003 Topics
3719460 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#2433572 - 11/13/11 04:46 PM Grand Caravan shifting/rpms?
otis24 Offline


Registered: 10/30/05
Posts: 1195
Loc: South Dakota
At approximately what rpm's should my 2005 Grand Caravan (3.8) be shifting? The vehicle has always been well maintained and I use a tranny cooler. Currently, it seems to be shifting at 2500-3000 rpm's which is a little longer shift than I remember it having. I also added Lubegard to the transmission in case there may be a sticky valve. Are there adjustments that can be done to the tranny? Vehicle has 138k miles.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)
2009 Chrysler T&C (85k, 3.8)

Top
#2433578 - 11/13/11 04:53 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
crazyoildude Offline


Registered: 07/23/08
Posts: 6727
Loc: new jersey
change the atf and only use atf-4 make sure you get all the old stuff out... Most of the time reprogramming the tcm fixes the shifting problems.. If problem comes back there may be a problem with the tcm or in some cases such as my sisters (the clockspring) i know it maes almost no sense but it was her clockspring this was a problem for over a year and when i was forced to replace the clockspring the problem never came back..

Top
#2433581 - 11/13/11 04:57 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
NHGUY Offline


Registered: 10/09/11
Posts: 3889
Loc: USA
NO adjustments.You have the 41TE transmission.Totally electronic.The TCM tells the solenoid pack when to apply fluid pressure to what gear position,and based on input/output trans sensors,and throttle position,shifts are made.Now,this transmission was the worlds first fully electronic,and adaptable transmission (it came out way back in 1989).What that means,is,its "smart".It learns how the driver acts,wether he's a slowpoke,or a speed demon,and adjusts shifts accordingly.Seemingly you have demonstrated that you prefer fast acceleration,and normally travel highway/interstate speeds.
Now,saying all that,I find that these transmissions arent all that "smart".You could only once in a while demand rapid acceleration,and it will think thats how you drive all the time.Hence the dragged out upshifts.If the RPMs seem to be a bit high,lift your foot a bit off the throttle and it will upshift sooner.Also,check your fluid level.

Top
#2433591 - 11/13/11 05:07 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
otis24 Offline


Registered: 10/30/05
Posts: 1195
Loc: South Dakota
Fluid level is good and bright red. I actually removed about twelve ounces so that I could add the Lubegard. Tranny was flushed at 30k and again around 60k (because I was pulling a tent camper at that time). Use only Mopar ATF +4. Most of my driving is in town (two miles or less), with an occasional hiway trip thrown in.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)
2009 Chrysler T&C (85k, 3.8)

Top
#2433640 - 11/13/11 06:17 PM Re: Grand Caravan shifting/rpms? [Re: NHGUY]
Spazdog Offline


Registered: 09/06/10
Posts: 5941
Loc: Arlington
Originally Posted By: NHGUY
NO adjustments.You have the 41TE transmission.Totally electronic.The TCM tells the solenoid pack when to apply fluid pressure to what gear position,and based on input/output trans sensors,and throttle position,shifts are made.Now,this transmission was the worlds first fully electronic,and adaptable transmission (it came out way back in 1989).What that means,is,its "smart".It learns how the driver acts,wether he's a slowpoke,or a speed demon,and adjusts shifts accordingly.Seemingly you have demonstrated that you prefer fast acceleration,and normally travel highway/interstate speeds.
Now,saying all that,I find that these transmissions arent all that "smart".You could only once in a while demand rapid acceleration,and it will think thats how you drive all the time.Hence the dragged out upshifts.If the RPMs seem to be a bit high,lift your foot a bit off the throttle and it will upshift sooner.Also,check your fluid level.


Concur 100%.

I sometimes use the autostick to upshift to 4th a little early but I find that it "re-learns" pretty quickly and adjusts to throttle inputs just about the same as it's older non-autostick" predecessor did in my 2.5 convertible. It might drag out the upshifts a little after some sprited acceleration but settles back down.
_________________________
2013 Chevrolet Cruze Eco - dealer Dexos
2014 Chrysler 200S - Whatever the dealer put in it.
1987 Honda CN250 Helix - Penn Platinum Euro5W40

Top
#2433679 - 11/13/11 07:11 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
crazyoildude Offline


Registered: 07/23/08
Posts: 6727
Loc: new jersey
I personally dont add any "extras" to my transmission fluid unless there is a seal leak..after the leak stops i usually change the fluid and all is well if the leak stops..

Top
#2433955 - 11/14/11 07:57 AM Re: Grand Caravan shifting/rpms? [Re: otis24]
meep Offline


Registered: 02/20/07
Posts: 2669
Loc: Southeast
the shift schedule will change if it thinks it's really hot or really cold. Under normal driving that driveline will shift between 1500 and 2200 rpm (I have an 03). The trans does not have it's own temp sensor (or at least anything more than an overheat sensor) to my knowledge but uses a calculation based on how long it's been running, engine temp, ambient temp, and how aggressive the driving is. Does it go into lockup at cruise? Yes- may think it's too hot (delays shifts when hot and uses lockup). No- it could think it's too cold (delays shifts and doesn't go into lockup).

you won't get much info out of it without having it plugged into a scan tool that can read the trans. I don't think many can.

M
_________________________
2006 Tundra 2wd
2002 MDX (wifey!)
2003 town and country, in various state of repair

Top
#2434398 - 11/14/11 05:19 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
CBR.worm Offline


Registered: 05/10/05
Posts: 1551
Loc: Jupiter, Fl
That doesn't seem to extreme. If the engine running well? If it is not it may hold each gear a bit longer if power is down. No CEL right?
_________________________
'06 Infiniti G35 Sedan 6MT - 160k

Top
#2434562 - 11/14/11 08:04 PM Re: Grand Caravan shifting/rpms? [Re: otis24]
otis24 Offline


Registered: 10/30/05
Posts: 1195
Loc: South Dakota
Runs great. No CEL.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)
2009 Chrysler T&C (85k, 3.8)

Top