4t60e tranny and P1860 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-15-2009, 01:28 AM   #1
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Default 4t60e tranny and P1860

I pulled this code from my scanner which indicates a problem with the pulse width management for the torque converter clutch. Driving symptoms include surging when the TTC locked in 3rd or 4th. The code was set during a hot day after driving for several hours.

I plan to drop the pan and change the fluid and filter this summer. Is there anything else I can do easily at the same time to address the code?

Also, am I looking at a transmission rebuild soon? Or should I be able to have the TCC solenoid serviced at a shop before a rebuild is necessary? Or can any of these questions really be answered without going to a shop to have the cause diagnosed?

Enslow

1997 Lesabre
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Old 07-15-2009, 08:46 AM   #2
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Adding a trans cooler may also help. A friend has the same issues, only occurs when the car warms up.
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