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RWD - Severe Transmission Problems

Volvo RWD 900 Forum

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Severe Transmission Problems 900 1996

Transmission was operating fine until the arrow warning light and winter/sport/economy switches starting flashing after a 10 mile drive. Drove it another mile to my house and lost drive and reverse entirely. Let it sit for 10 minutes and was able to drive the car into its parking spot. Fluid looked clean, so I took it to a shop that could read the diagnostic codes. Codes were:
AT-232 - speed sensor absent
AT-114 - mode selector switch signal
AT-341 - lock-up function slipping
They suggested I troubleshoot the circuits involved in sending the speed signal to the transmission. So I first checked the harness connectors underneath the transmission and near the dipstick area. Test drove car and had same symptoms: severe slippage on a hill, but able to move after 10-15 minute shutdown. Since the speedometer works during these "breakdowns," I figure the speed sensor in the rear axle is working. I removed the instrument cluster and checked continuity from the speedo to the transmission control module. Also, from TCM to ground. Swapped the transmission control module with another one. Car continues to drive OK for a few miles before severe slipping reoccurs.
Interested in Brickboarder's experience with these codes and/or problems.
Have a happy 4th!

 





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New Severe Transmission Problems [900][1996]
posted by  analogdad  on Tue Jul 3 15:28 CST 2018 >

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