ive recently installed a modulator on my transmition on my 93 SSEi and all i can say is wow,well not really.somoetimes in the morning,or when the car is cold,when im about to shift gear,the transmittion hits so hard that it sounds like its going to break.now in performance,dont get me wrong,its great,but i keep hearnig this winny noise coming from the trannsmition,its a winny sound like a fords powersteering pump,lol.anywaze,i need help,should the tranny hit hard in cold starts,and should the tranny should be winnyng like a fords powersteering pump with the performance modulator i installed?please help me guys!!!

As you may have guessed, whining transmissions are not a good thing. Go get it diagnosed. Check your fluid color, smell, and level right after driving, and report it back here. This is the first thing you always check when you have trans problems.

Back off your modulator until you know what'* going on. It did not cause the problem.

Agreed with WilWren.

Whining is not good from transmissions. That could be the beginning of many things about to fail.

ok,i checked my color and its a little red,but more greyish!and it smells like a burned cookie and bacon all in one smell.

Time for a fluid and filter change to start. Are you running a cooler?

well im guessing im not cause i havent done anyhting to the transmitton system unless theres a stock one!

The whinning is your transmission pump working its heart out, your line pressure is way too high. The high pressure is causing the hard shifts. All of this is caused by your vacuum modulator. If it is adjustable, turn the pressure down ( decrease the spring pressure, usually means turn the adjusting screw CCW). Check that the vacuum line from the throttle body is connected and providing vacuum. High vacuum like at idle or part throttle calls for low line pressure, low vacuum like at full throttle or disconnected vacuum line callsfor high line pressure. Your transmission will thank you...

were is the adjuster screw located and if theres a picture you
can show me,ill really apretiated.

The aftermarket adjustable modulators that I am familliar with have the adjustment screw inside the vacuum port. remove the vacuum line, insert a small ftat blade screwdriver and feel for the slot. Turning CW adds spring compression and increases the line pressure across the operating range, CCW reduces spring conpression and line pressure. You can set the line pressure by feel, adjusting for that solid shift feel during normal driving. There is a line pressure tap on top of the transmission near the breather port if you want to add a pressure guage to aid in the adjustment process. It is a 1/8 NPT threaded port, pressure should 60 to 90 PSI at idle, maximum pressure will be close to 300 PSI. GM has published a vacuum versus line pressure curve, but I don't think you need to go that far.

That whiney noise is your pump! You are working it Way to hard and its being told to put out too much PSI, turn the modulator down, back the screw out CCW.


Edit now that I go back and read..do what SSei93 said or what I said or combine the two