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Transmission lock up

Tiny
TYEROY
  • MEMBER
  • 1991 CHEVROLET BERETTA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
91 chevy beretta w/automatic--works ok for approx 30 mins then it locks up to the engine. Locks up in high gear and will not down shift.
Monday, March 14th, 2011 AT 9:41 PM

3 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Not sure if you will get any codes in these transmissions, but a scan will be a good place to start, also a line pressure test will also give a tech a good indication of any internal problem, start here.
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Tuesday, March 15th, 2011 AT 7:43 AM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
This car has a 125 transmission and what happens is the torque converter clutch solenoid sticks causing the torque converter not to disengage from engine. If you look down on top of transmission you will see a white Plug with about 4 wires in it. Disconnect plug and your problem will go away. You can either leave it unplugged and lose your Tcc lock up or you can replace the solenoid.
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+1
Tuesday, March 15th, 2011 AT 8:51 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Best get a scan first and see what the exact code is first.
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Sunday, March 20th, 2011 AT 11:14 AM

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