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Diagnostic code for dodge caravan 1996 P1784?

Diagnostic code for dodge caravan 1996 P1784? trans. something?

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The code is about the switch that monitors the hydraulic pressure for operating the low/reverse clutch of the transmission. That clutch is called into play for all forward gears as well as reverse, so it seems reasonable if that clutch were not working that the car wouldn't move in any gear. I would begin by making sure that there is sufficient trans fluid by inspecting its dipstick. If needed only use ATF +4 but don't overfill it. Also, just on a chance, take a look underneath to see if you see any motion of either the left or right half axles (or one moving, but one not) which would be another reason for no motion due to a drive shaft disconnection or some such anomaly. Other than that, your problem could be with the Low/Reverse solenoid switch in the solenoid pack portion of the transmission (the box on the driver's side of the trans) being stuck. That can be repaired without removing and rebuilding the transmission so let us hope that may be the cause. I would have the car towed to a good independent trans shop that has a reputation for knowing how to service the Chrysler electronic transmission.

Hope this helps.

Posted on Jul 29, 2010


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1 Answer

1996 Dodge caravan code 1784 what is it

P1784 indicates a transmission mechainical failure, it must be diagnosed further to find out exactly the cause of the failure.

Feb 09, 2012 | 1996 Dodge Caravan

1 Answer

Whats a reverse ratio and a P1784 & P1782


Technically speaking a gear ratio is the rapport between the angular velocity (rotating speed) of the engine shaft and the angular velocity of the transmission output shaft.
The reverse ration is the ratio of the reverse gear. Your codes are pointing at a problem with the electronic transmission, probably a defective pressure switch inside transmission resulting in wrong reverse gear ratio. Please see my troubleshooting in this similar case where a defective pressure switch led to incorrect first gear ratio (I know your code is with reverse).



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What does these codes mean P1781, P0731, P1784 AND P0700 AND HOW DO I FIX THEM.

p1781 is manufacturer control transmission, p0731 is gear 1 ratio incorrect, p1784 is manufacturer control transmission, p0700 is trans, control system malfunction. all of these codes refer to tranny.This code normally points to a faulty transmission control module, but this is an expensive part and you should have an experienced Dodge technician diagnose the problem first. or a transmission specialist. the other codes are probably associated with the p0700 code. have a good day !

Apr 27, 2011 | 2001 Dodge Grand Caravan

1 Answer

Trouble code p1784 on dodge grand caravan

found this on another page.....
Originally Posted by vasau viewpost.gif The vehicle came in with 2 trouble codes and complaint on a transmission shifting.
P1775 Solenoid Switch Valve Stuck in TCC.
P1784 LR Pressure Switch Circuit.
After clearing these 2 codes the van ran normal for about 20 minutes without any issue, but after, the problems came back with no codes.
LR Pressure Switch is always in "Open" position. Must be closed at Park, Rev and Neutral.
Could anyone explain to me how the switch works. Is this the solenoid pack or the LR Pressure issue?The L/R pressure switch should be closed in P/N only. The switch should open when put into REV if the trans is not in limp-in mode. All switches will stay CLOSED if the trans is in limp-in mode. Disconnect the trans 8-way connector at the solenoid pack. Key on scanner hooked up apply 12 volts to the L/R pressure switch pin in the 8-way connector and watch for the switch to change from open to closed. If it does change the SSV may be stuck in the TCC position. You will have to remove the valvebody and inspect the solenoid switch valve to know for sure. The pressure switch itself is in the solenoid pack. If you have an old solenoid pack changing it is easier and quicker than inspecting the valvebody. Perform your diag for fault P1784. I believe the pressure switch is also closed in 1st gear also. Hope this helps.

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Took van to mechanic, was diagnosed via computer with possible problems. Main Code of P0740-torque converter clutch control circuit is the symptom. Possible other issues: low batter voltage causing...

Having owned a trans shop,I would be supprised, you got anywhere near 100,00 miles, with that trans.
Caravans made up 50% of my business in the 90's.
All van transaxles are bad

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Code p1784 is pressure switch circuit:LR How to

you'll need to have a transmission shop check the wiring harness in the transmission first ,then they can repair it,this is not a job to be doing yourself,

Jan 26, 2010 | 2000 Dodge Dakota Quad Cab

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P1784=Pressure switch circuit: LR,
this is a switch in the transmission,the code is being erased with the cycling of the key,

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I need the diagram's transmision of Grand Caravan 1996 liter 3.3 please, Becose error code P1782

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Dec 29, 2009 | 1996 Dodge Grand Caravan

1 Answer

1996 Dodge Caravan with 76000 will not shift out of first gear.

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May 09, 2009 | 1996 Dodge Caravan

1 Answer

"Where do I find the pressure switch circuit: LR"

There is a row of plugs beaneath the solenoid pack. One of those is a rev pressure port. If reverse is gone, I am betting on a broken internal part.

Apr 06, 2009 | 1996 Dodge Caravan

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