temperature sensor and gear shifter faults

[Aeromotive Customs]

high guys.I have a premio 2007 model that was recently replaced engine (1zz-fe)and gear box.Been running well for a while but had a a slight gear shift delay but as of yesterday the coolant temperature sensor fail.after i unplugged it so that the fan can run full time (temporary measure)  after that was done i realized the gear doesn't shift past the 3rd gear.is there any way the issues are related or are they two independent issues.please do advice.

Aeromotive Customs Auto-Care

Edited May 4, 2018 by Aeromotive Customs
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[vag2]

  On 5/4/2018 at 7:54 AM, Aeromotive Customs said:

coolant temperature sensor fail.after i unplugged it so that the fan can run full time

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what makes you think (as a proper trained Auto technician),that making coolant fan running full time will solve a gearbox issue? It can cause more issues, and may put the car in limp-home mode,where RPM is reduced to 2000. And below 2000, the transmission may be programmed to run no higher than 3rd gear.