Transmission Problems? Ask a Mechanic for Answers ASAP
when you said it shifts fine in all other gears what do you mean by this?
is this if you manually shift the transmission?
or if you ease into the throttle the transmission shifts?
ok now i understand a little better. theses transmissions are also effected on the shifting from the maf sensor. have you tried cleaning the sensor. if not i would start with cleaning the sensor and see how it shifts from there. if you still have an issue try both manually shifting it while the transmission is plugged in. and then manually shifting with the transmission unplugged. with the transmission unplugged you will have harsh engagements and shifts as you will have max line pressure at this moment. if you dont have harsh engagements you have a bad transmission. these transmissions are known to have valve body issues with valves sticking and you will probably be able to get away with swapping the valve body out if that is the issue. also the shift solenoids are and EPC solenoids are known to stick and are fairly inexpensive and easy to change. if the maf sensor does no solve the issue and manually shifting it seems to operate normally. i would start with changing the solenoids and transmission harness in the pan. since they are not to expensive and if yout in there changing one its a mess to have to do it again to change another. make sure you get the epc solenoid that matches the one you have they had two different variations.
sorry for the delay i have been having internet issues all day. i have not seen a chevy or gm vehicle that does not have a maf sensor.
the epc solenoid is the main solenoid that controls the internal line pressure in the transmission. to unplug the harness there is a heat shield on the passenger side of the transmission that will need to be removed it is held on with two 10mm bolts. after removing that the plug is above the pan near the back you squeeze both sides of the plug and lift up.
the epc solenoid is located directly under where the harness enters the transmission. as far as ording it i would label it the internal solenoid harness or valve body harness when looking it up.
has this engine been swapped not gm vehicle in 95 has a carb. maybe throttle body injected but ob2 or even obd1 vehicles are non carbed
yes the epc solenoid is inside the trans pan. you will be able to access all the solenoids with the pan and filter off.
since it is throttle body injected it does not have the maf. i apologize i was working with someone else on a newer silverado at the same time. same issue. have you cleaned the throttle body?
yes thottle body cleaner works well. i would do it with the engine running
its not too complicated. the main thing to pay attention to is the manual valve making sure you get that hooked back up correctly. that is the valve in the body and links up to the shift lever it just has a groove you have to line up no bolts or clips on that