Thread: 01 4t65e tranny shudder problem

It's about an hour to two if it's your first time out. That's as long as you dont' find "parts" in the pan.

Now I hate you.

I've never read or heard of Maf controlling line pressure, it is used to determine shifts etc along with TPS

The MAF has a direct effect on transmission line pressure. A dirty MAF can cause low line pressure.
Something else on this note- Changing/Upgrading your MAF sensor to a larger one, porting your throttle body, larger intake piping ALL effect MAF signal. When you make the pathway larger you slow down airflow across the MAF sensor and guess what- lower trans line pressure, especially at WOT on the high end of the scale. Not something you think about but when you experience it first hand and see the results you never forget.

Should I go with the 64.95 one or the 89.95 one?

We started to offer a Combo Kit for the Transgo Shift Kit as it includes a new filter and required gaskets to install the shift kit. The basic $64.95 kit is considered a rebuilders kit and does not include any gaskets. As a bare minimum the accumulator body gasket should be replaced if you are going to install any shift kit.

As Bill said above the shift kit will help to clean up your shifts but is not going to address your whole problem. The whine noise could be a number of things. You mention it happening in gear, but does it make the noise if sitting stopped while in gear? There are a lot of posibilities and some are fairly common in these transmissions that will cause a whine. Also check your engine accessories and idler pullies- they can fool you and make plenty of noise and a stethoscope will help isolate the source. Your slippage on take-off and banging into gear could be result of a few other problems and most likely worn seals and worn input clutch apply piston as this is fairly common. Here is more info on this- No Forward Cold

When you pull the shifter down into manual 1st gear there will be an audible noise from the pump as the transmission is basically running at max line pressure in this range and that is strictly a mechanical function of the transmission as the higher line pressure helps with extra holding power for engine braking while coasting down. This is normal though some make a bit more noise than others.

If your trans is making more noise after you drive it for a while and it is warmed up then likely that is result of code P1811 setting from shifts taking too long and when the pcm sets this code the transmission goes into max line pressure to prevent slippage. When you shut the car off and restart it this resets until you drive it again. No check engine light will set and often a cheap code reader will not detect this unless the code is present with car running. If your filter is very dirty and restrictive then it is due to a lot of debris and it came from somewhere which means there is deeper damage. Normally if the filter is plugged to the point of noise from the pump or torque converter it is result of the torque converter coming apart and putting a lot of fine debris in the fluid so hopefully you arent at that point and since it still drives without leaving you stuck then I doubt it is a problem.

I am not a big fan of additives unless you are trying to fix something to buy a little more life out of the trans. As Bill mentioned you could try adding a bottle of Lucas transmission additive and several guys have tried this with good luck to help with intermittant problems. Lubegard Red is also a good additive. Dexron III fluid would be safest since your transmission has not been serviced. Dex VI is a good fluid but it would be better left for use in a fresh rebuild or a lower mileage transmission that doesnt have as much age on the fluid. There have been several guys that had slippage problems when going from old fluid to a synthetic with these transmissions like Bill mentioned earlier. The pcm will adapt to this, but if the transmission is already worn then it doesnt have much window of compensation before a code will set.

Dave...as always, thanks for the education on something I hadn't come across. It's impossible to read one of your posts w/o learning more.