my Explorer Trans

[myexplorer]

I have 94 ford Explorer XLT rear wheel drive my trans was shiffting great but last week i notice when is cold trans dosent shift from one to two, but when the truck get warm trans shift great even i stop couple hourse and i drive again shifting great only when is cold i mean in the morinng or even at night if the truck sits 5 ,6 hourse and i come to drive dosent shift from one to two i keep drive little till start shifting ok. after that i check trans oil was ok but i change trans the filter and oil but still is same problem i hope some one knows exactly what going one.
thankyou

DONT WORRY i FIND THE PROBLEM AND I FIXIT MY SELF

[Stillaford]

Possible sticking solenoid. Replace and confirm shifting is corrected.

[myexplorer]

which solenoid? please explain please?

[Stillaford]

Are there any codes present?

[myexplorer]

NO No any codes no service engine light on do i have to put scanner to check the code even the light is not ON? because I didnt check with the scanner . i even add Gear Lube special for Trans accordnig trans specialist but still the same

[myexplorer]

dont worry I find the problem and i fixit

[IAmTodd]

Matt, it's a vacuum operated trans, the only electronic bits are the torque converter lockup solenoid and the OD lockup solenoid.

Betting it was the vacuum modulator (I think that's what it's called)?

[Stillaford]

That makes sense, since it's a first gen. I don't have any experience with them so I was going off what I know about the 4r55e.

[myexplorer]

No no is not the vacuum modulator i find the problem and i fixit my self .

Thankyou anyhow