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I'm having my transmission looked at today, if there is a slip in 4th gear, do I need to replace it?

Tiny
STACEYMILLER
  • MEMBER
  • 1996 OLDSMOBILE CUTLASS
  • 115,250 MILES
I recently bought a used 96' oldsmobile cutlass supreme. I took it to AutoZone because my check engine light was on. One of the codes is P1870. It says that transmission component slipping. Transmission is in 4th gear with TCC engaged and the ECM has detected excessive slippage when comparing the input shaft speed to the output shaft speed.
We checked the tranny fluid and it looks fine. The other two causes listed are "trailer towing may set code" which I don't know what that is, and the other says "internal transmission fault". Will this be the undoing of my car? I only paid 300 for it and don't want to have to buy a new transmission.
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Sunday, August 26th, 2012 AT 6:02 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The converter is slipping internally and most likely the trans will have to come out and either be re built or replaced.

Roy
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Sunday, August 26th, 2012 AT 6:07 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
This is more ilikely to be electrical issues rather than the transmission itself.

P1860 = PWM solenoid electrical problem.

It cold be the wiring, the PWM solenoid or a bad PCM and testings have to be carried out to confirm.
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Sunday, August 26th, 2012 AT 6:11 PM

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