it was a separate event 3 months apart.
Thanks a lot for the suggestion!

 

I did change the transmission filter and fluid with atf+4, as well as the in/output speed sensors. Drove it around. it stops when it attempts to go on 2nd gear. it keeps running on first gear, barely pressing the gas so it won't change gear otherwise it will stop. There is still no reverse. could it be TCM or solenoid driver. I'll swap an identical relay later to test.

 

How are the battery and alt? Bad battery or alt are very well know to cause all sorts of problems on our vans. If they are both definitely ok, you should at least get the new set of codes before doing anything else. The P0720 should be gone now, and if it's not, then maybe a TCM relearn is needed.

 

Here is a TSB from 2002. But I would have a clutch test done with a scanner and check the CVI too. You could have a broken hub with shaft. But thats just a guess.

NUMBER: 21-001-02
GROUP: Transmission
DATE: Jul. 1, 2002
This bulletin is supplied as technical information only and is not an authorization for repair.
SUBJECT:
Transaxle Slips In Reverse Or First Gear
OVERVIEW:
This bulletin involves replacing the low/reverse accumulator cover and
O-ring during transmission repair.
MODELS:
2002 (JR) Sebring Sedan/Sebring Convertible/Stratus Sedan
2002 (PL) Neon
2002 (PT) PT Cruiser
2002 (RS) Town & Country/Voyager/Caravan
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH AN AUTOMATIC
TRANSAXLE WITH BUILD CODE DATES OF 1342 (MAY 14, 2002) THROUGH
AND INCLUDING 1502 (MAY 30, 2002). REFER TO THE APPROPRIATE
SERVICE MANUAL OR MDS2 SERVICE INFORMATION FOR THE TRANSAXLE
LABEL LOCATION AND CODE INFORMATION.
SYMPTOM/CONDITION:
Some vehicles may have a transaxle that will not move or slips in Reverse or First gear.
DISCUSSION:
Vehicles equipped with automatic transaxles built in the range specified that exhibit
the condition(s) listed above may also have Diagnostic Trouble Code(s) (DTC)
P0736, Gear Ratio Error In Reverse, or P0731, Gear Ratio Error In 1st set. All
vehicles that fall in this category must have the Low/Reverse Accumulator
Cover and O-Ring replaced during transmission repair.
PARTS REQUIRED:
Qty. Part No. Description
1 04431617 Cover, Low/Reverse Accumulator
1 06501549 O-Ring, Low/Reverse Accumulator
POLICY:
Information Only

 

It runs on first gear, no second but sounds and feels like in neutral. Restart the van and drives again in first and stays running at 5 mph or less. No reverse. I will try speeding up to above 27 mph from first gear if it will shift to 3rd then my impression will be likely 2/4 and reverse clutch hub. Will appreciate other thoughts.

 

I need anybody's info on how much it cost to transmission repair for this in California, loma Linda or San Bernardino area. Not dealership.any trustworthy transmission shop you can recommend?

 

I'm in the San Francisco area. We charge about 3500.00 for parts and labor. But I wouldn't know what everyone else is charging.