T3200M and 3rd Party Router

[wireless]

Hello, I'm a new Telus customer. We just had the service installed and I'm trying to improve the internet speed on my WiFi network using a 3rd party router.
First things first. Hardwired to the Telus T3200M I get good speed 900mbps.
T3200M is in the mechanical room in the basement so coverage is not great but even standing beside it I only get 200-300mbps. I used to get over 200 with Shaw Internet 300 service. So it's not great when I upgraded to get closer to the Gigabit speeds.
I decided to try my DLink 880L router which I used before with Shaw and have located centrally in the house. This is where I'm having issues.

Bridged or not I only get 80-90mbps when hardwired to the DLink router. I even made and tested a new Ethernet cable and ran it through the halls to ensure it wasn't the connection.
I'm thinking there is some sort of conflict???
Anyone have any suggestions I could try?

Thanks in advance.




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