overdrive shift?

[houstonhomer]

At what speed should a stock 4L60 in a syclone shift into overdrive @ WOT?
My truck is shifting 85mph @ 4200RPM does that sound a little low?

 

[jwaller]

Re: overdrive shift?

a stock 4L60 will not shift into 4th @ WOT unless you have modified it. but if you meam a stock sy trans, then it should shift into 4th at about 90. but that all depends on about 100 different things. HTH's