Shifted to 1st gear @ Freeway speeds.. advice?
Thread Starter
Member
Joined: Jul 2006
Posts: 193
Likes: 7
From: Alameda, CA
1991 SC Miata, 1999 W210 Estate Wagon, 2014 W212 Sport Wagon
Shifted to 1st gear @ Freeway speeds.. advice?
I was cruising along between 75-80 mph yesterday when my rear wheels suddenly locked up (no prior warning) and as I pulled over to the side, I noticed that the engine redlined. I assume the TCU thought I was in a lower speed and proceeded to slam the transmission to a slower gear. Anyway, I just restarted the car and it's been riding fine again (I don't think I suffered any mechanical issues with this event.. 100 miles driven since yesterday). A few months ago, something similar happened (transmission disengaged with the selector on Drive).
So is this a speed sensor problem which warrants a conductor plate replacement? Some initial searches on this forum tell me this is the main culprit... just want to make sure before I tear into it. FWIW, it's a 1999 E320 wagon with 306,000 miles on it (tranny rebuilt in 2011 but conductor plate was not replaced).
So is this a speed sensor problem which warrants a conductor plate replacement? Some initial searches on this forum tell me this is the main culprit... just want to make sure before I tear into it. FWIW, it's a 1999 E320 wagon with 306,000 miles on it (tranny rebuilt in 2011 but conductor plate was not replaced).
Junior Member
Joined: Mar 2017
Posts: 65
Likes: 12
1995 E420, 1998 E300TD, 2002 CL230K 6spd, 2002 CL230K auto, 2002 CL280T VR6 Project, 2001 A6 2.7T
I was cruising along between 75-80 mph yesterday when my rear wheels suddenly locked up (no prior warning) and as I pulled over to the side, I noticed that the engine redlined. I assume the TCU thought I was in a lower speed and proceeded to slam the transmission to a slower gear. Anyway, I just restarted the car and it's been riding fine again (I don't think I suffered any mechanical issues with this event.. 100 miles driven since yesterday). A few months ago, something similar happened (transmission disengaged with the selector on Drive).
So is this a speed sensor problem which warrants a conductor plate replacement? Some initial searches on this forum tell me this is the main culprit... just want to make sure before I tear into it. FWIW, it's a 1999 E320 wagon with 306,000 miles on it (tranny rebuilt in 2011 but conductor plate was not replaced).
So is this a speed sensor problem which warrants a conductor plate replacement? Some initial searches on this forum tell me this is the main culprit... just want to make sure before I tear into it. FWIW, it's a 1999 E320 wagon with 306,000 miles on it (tranny rebuilt in 2011 but conductor plate was not replaced).
best regards
