A glorified, transformed body is one that is no longer subject to aging, illnesses, diseases, deterioration, or death. This is the kind of body our Lord currently has. At His death, His physical body underwent a transformation, a glorification following His physical demise [see John 7:39 & Phil. 3:21]. And it was this living form that appeared to His disciples on the mountain, and the living forms of Moses and Elijah—all glorious forms. [Note: “glorify” & “glorified,” according to the Greek, have a wide application.]John 7:39 Now this he said about the Spirit, whom those who believed in him were to receive, for as yet the Spirit had not been given, because Jesus was not yet glorified.
Given that the Spirit was not given until after Jesus ascended into heaven to be at God's right hand, I would reject any transformation or glorification at His death and place it at His ascension. And that particularly given His prayer in John 17:5 that would place His glorification at His return to the Father's side.
I find it interesting and not happenstance that when speaking of Jesus "resurrection" from the dead and before His ascension the Greek word ἔγερσις [egersis] is used. This is from the Greek word ἐγείρω [egeirō] which is the same word used to describe the raising of Lazarus from the dead (John 12:1). In all other instances when speaking of the resurrection at the end of the age, with Jesus' return, the Greek word for resurrection is ἀνάστασις [anastasis]. I believe that Jesus' rising from the dead is not the resurrection that is referred to when speaking of the "resurrection" in passages such as Matthew 22:28-31, Mark 12:23, Luke 14:14, John 11:24-25, Acts 2:31;4:2;4:33;17:18, etc. Instead, I believe the resurrection being spoken of in those and all other such passages relates not to His being raised from the dead, but rather to His being ascended to Heaven.
I would point out that in passages such as Romans 6:1-14, it speaks of Jesus being raised from the dead (vv. 4&9) it is the Greek word ἐγείρω [egeirō] that is used. But when it speaks of His resurrection in verse 5 it is not ἔγερσις [egersis]; rather it is ἀνάστασις [anastasis].
All of this suggests to me that there is the raising of Jesus from the dead and there is Jesus' resurrection and they do not speak to the same event. That tells me that the transformation, the glorification following His physical death and being raised from the dead did not occur until His ascension.
But maybe that is just me.