Auto Gearbox drops into limp mode

2000 Chrysler Grand Voyager 3.3 LX Auto - Petrol wIth LPGA Approved LPG conversion
Car: Chrysler Grand Voyager
Year: 2000
Variant: 3.3 LX Auto - Petrol wIth LPGA Approved LPG conversion
Categories: Electrics, ECU, Warnings & Lights
Sudden failure when joining motorway and gently accelerating. Selection 3rd to 4th failed to properly engage (rising rpm indicating neutral condition) shortly after dropping into 2nd as speed decayed remaining in 2nd (limp mode).

Gearbox oil not burned (good condition) changed with correct Mopar ATF +4 and gasket renewed. Subsequently swapped EATX relay, replaced shift solenoid and input & output speed sensors ( Mopar Original new parts). Fault condition (limp mode) remains.

Any suggestions on what/where else to look for/at?
Problem added: Nov 22, 2014 (9 years ago)
Voyager Pilot

Points: 4
Best to get it scanned rather than guess ?
Answered Nov 23, 2014 (9 years ago)
whittingehame

Points: 37,684
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