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#1
10-30-2006, 06:21 PM
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1997 suburban trans probblems
My borther in-laws suburban shifts hard when i has been driven for a while, its a automatic, I was thinking it needs a fluid and filter change. Any other possabilities of what it could be.
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1979 pontiac firebird- for sale/trade 1978 Chevy Elcamino- parting out 
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#3
10-30-2006, 06:24 PM
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Re: 1997 suburban tarns probablems
What is the pcs? Dose the trans half to be dropped and split?
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1979 pontiac firebird- for sale/trade 1978 Chevy Elcamino- parting out
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#4
10-30-2006, 07:39 PM
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Re: 1997 suburban tarns probablems
Pressure control solenoid, assumnng this turns out to be the diagnosis, the solenoid pack is accessible with just the pan dropped.
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#5
10-31-2006, 09:25 AM
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Re: 1997 suburban trans probblems
Or the connections to the pressure control solenoid. The main electrical connector on the RR corner of the trans is a potential problem area.
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#6
11-03-2006, 08:11 AM
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Re: 1997 suburban trans probblems
It could be ready to set the P1870 code from a valve body that is worn where the tcc apply piston sets. Quite a few wear and leak fluid by and when the PCM detects enough slippage it commands full fluid pressure which causes some hard shifs
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