Question about 1997 Chevrolet Cavalier
Do you also have a check engine light on as well?
Go to an auto parts store like autozone where they'll plug it up to a scan tool for the trouble code for free.
How do the forward gears react?...shifts rough?...clunks through gears?...slips? (engine speeding up but forward travel isnt)
Start on level ground...engine cooled.
If low or missing trans. fluid...any leaks?
Check for trans. fluid in the radiator (not the recovery). The radiator is a cooling unit for the fluid and in some cases can rupture , pushing fluid into the radiator itself. Check especially up towards the radiator area where the trans. fluid lines go into the radiator.
Is the access door for the oil filter in place? It needs to be.(has to do with cooling, and area of greater/lesser air resistense)
How about the fluid...smell?...dirty?...gooey?
For trans fluid ,check trans fluid level with engine on, hot and running in park, on level ground.
You have a 4L60E M30 series transmission. Has certain components (valves-solenoids) in it that can keep transmissions from shifting properly should the fluid overheat or the pressure become too high/low.
The usual trouble code this displays is P1870.
Sometimes it is simply a TCC valve out of whack and can be replaced
Posted on Jan 04, 2009
Transmission is going out
Posted on Aug 10, 2008
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Posted on Jan 02, 2017
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Oct 27, 2015 | 1996 Volkswagen Jetta
The reversing lamp system consists of the following components:
When the transmission is placed in REVERSE (R), the BCM provides voltage to the reversing lamps. The reversing lamps are located within the rear lamp assemblies.
When the transmission is in REVERSE, the PCM (gasoline engine) or the Transmission Control Module (TCM) (diesel engine) sends a message over the High Speed Controller Area Network (HS-CAN) to the Body Control Module (BCM) indicating the transmission is in REVERSE. The BCM provides voltage to the reversing lamps when it receives the message that the transmission is in REVERSE and the ignition is in the RUN state. You could have a transmission range sensor problem , check to see if it is adjusted correctly ! Need to have a scan tool to make sure the BCM is receiving signal from the PCM . This is complex for someone who doesn't deal with or know about serial data communications ! All it is ,is electric inputs to a control module, then the control module configures it into data bits an bytes 1's an 0's then sends it out on the Data bus. The module that needs this info reads it an turns on the lights.This system can set codes in the bcm ,leading to a problem.
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