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I called the transmission shop gave the code (.

Tiny
HUNTRS
  • MEMBER
  • 1999 CADILLAC ESCALADE
  • 143,000 MILES
I called the transmission shop gave the code (1870) and I was told it would cost around $1600 to repair, I just want to know if the transmission needs to be completly over hauled. Also could the transmission pressure manual valve position switch be bad, and would it cause this problem.
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Wednesday, October 17th, 2012 AT 7:37 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You need to have a shop look at it first. A guess over the phone is hardly a diag.

Yes, the valve can be replaced but damage may be done.

The price is good.

Get another opinion.

Roy
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Wednesday, October 17th, 2012 AT 7:48 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
A TFP manual valve position switch (Pressure Switch Assembly) malfunction could
set DTC P1870. Ensure final drive ratio matches PCM calibration. The following
mechanical conditions could set DTC P1870:

lShift solenoids.
TCC solenoid.
TCC PWM solenoid.
Internal transmission failures.
Engine misfire.
Transmission range switch DTC.

Code indicattes slipping so high possibility the trans has to be rebuilt.
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Wednesday, October 17th, 2012 AT 7:51 PM

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