Greg5OH

On saturday night I changed the engine oil, level is good.
Drained the trans, put in APPROX 2 quarts. Damn hard to read the level. used oem t-iv fluid.
Also disconnected battery for about 10 minutes to clean the connectors and make sure the second battery to fender (aftermarket 0 awg audio cable) has a nice bare metal surface behind it.


I drove it around the block on sunday night and it felt...strange.
Now tonight it was idling, and i tried revving it slowly, definite shudder from engine or trans around 1050 rpm, not smooth sily revvs, sounds kind of choppy.

..what the heck is wrong?!

2 things i can think of : does the engine have to relearn its map?
or, is there some air left in the tranny, its in the converter and what im feeling is converter shudder?

Ps, it ran butter smooth on friday night.

PureDrifter

iTrader: (10)

give it 2 days to to relearn driving style, and while you have your vehicle in the sig it helps to put it in the first post of the thread.

Finn

We changed 2 litres in my tranny last week and I do not feel any change - at least not for worse - in how it shifts.

Greg5OH

checked level this morning. stone cold, grossly overfilled (confounded autos i tell ya)
So i drained it all out, since im flushing whole system with a gallon of the new stuff (drain, refill, drain, refill, rinse repeat till all fluid is new bright red)

Anyway so i put in...maybe a quart? I really dont know, I pour it from the big steel can into a gallon old water jug for easier pouring.

turned it on, cycled through all the gears, back to part. turned it off let it sit for 10 mins

Came out, cold level looked spot on. Hop in to drive it...doesnt move anywhere in reverse...
Had to go to work so took my buddies car.

Also the roughness when free revving was still there,
UIm assuming there just wasnt enough fluid to engage a drive gear?

stephen18

The cold supposedly is a "ballpark" and it should be measured when hot and running(after driving 20 min or so)

Greg5OH

Well, she wont drive at the moment! lol.

Just going to add another quart and see what happens. Worst case i drain it, which I have to do anyway.

Darn work gets in the way of real (car) work.

LScowboyLS

No.



This is correct!

and make sure it is running, in Park, after just having shifted through the gears, and parked on very level ground when checking the fluid level (thoroughly warmed up, may take considerably more than 20 minutes in winter)

if you can't get it dead on the hot mark, remember that slightly over is better for the transmission than underfilled

Greg5OH

cool, Ill go ahead and add another quart tonight, let it idle for a good while and check the dipstick often.

Not sure if thats the cause of the engine roughness though...

stephen18

Some reason, my 94 seems to like having more than 2 quarts after a drain (3 or so..) otherwise it doesn't like to go into gear. But I'm pretty sure I have a valve body/solenoid issue to don't take my word lol. As LS said, overfilled is safer than under. Underfilled could kill a good trans

stephen18

Also my engine felt rough at certain rpms and idle (well rough for a Lexus.. meaning I could barely feel it running) and it turned out all my mounts were screwed..

Finn

That's it, I'm changing mine too, just in case.

Greg5OH

doont think its my mounts, because everythign was butter smooth before I did the fluids.

stephen18

I couodnt imagine fluids alone causing a change like that. U less some fluids were spilled on the motor and have made its way down to a spark plug wire (guilty here...)

Greg5OH

you know, it DOES feel like its misfiring...and I did spill some atf when i tried to make it chug a quart all at once...
I will dig deeper.
its COP, so we shall see.
First time id see ATF causing a misfire by getting on the connector though.

LScowboyLS

misfiring is a real possibility, but air in the torque converter and other silliness is not