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#1
10-22-2007, 09:09 PM
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Transmission will not shift into OD - Any ideas?
I have a 1998 Pontiac Grand Prix GT (3.8L) with an automatic trans (151K miles). Everything was great until yesterday. The transmission shift through all the gears normally, but will not shift into OD. It will make a bit of growling noise when it tries to shift to OD. The noise is not very loud, however easily detectable with the radio off. Any ideas of the cause? Is there any easy fix is this a complete re-build?
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#2
10-23-2007, 09:21 AM
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Re: Transmission will not shift into OD - Any ideas?
It sounds like an internal mechanical problem. Common cause of no 4th - OD or dropping out of OD is the 4th clutch shaft. The splines strip. You may need a rebuild. Other possibility is the shift solenoids not working properly.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#4
10-23-2007, 08:57 PM
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Re: Transmission will not shift into OD - Any ideas?
There are 2 shifts solenoids. 1-2 and 2-3. Both are used to get 4th OD and work in the form of a logic gate. 1-2 is energized and 2-3 is de-energized.
Other than a DTC code possibly indicating a solenoid is bad you can ohm the solenoid(s) coil resistance at the 20 way umbilical connector.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#5
10-24-2007, 09:30 PM
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Re: Transmission will not shift into OD - Any ideas?
Quote:
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#6
10-24-2007, 09:42 PM
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Re: Transmission will not shift into OD - Any ideas?
If you can find a picture you need pin "E" 12v power "A" SS1 and "B" SS2 they should be 20-25ohms. So you would put the DVM prob on "E" & put the other prob on "A" should be 20-25ohms do the same for "B". If all your other gears are fine its more than likely your 4th shaft. If you look at the connector the first pin in the upper left is "A" then "B" then "C" then "D" then drop down a line and go back to the left thats "E" and so on. These are the male pins on the transmission case.
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