MBX6T Steering problems

[SV6000]

Hi guys I posted This in another part of the forum but I thought I might get more help here. I was having a few steering problems with my 6T not having enough steering so I put in a hitec HS-7954TH and changed the internal bec on the mamba XL to put out 7.4v. Unfortunately I am having the same problem. When the car is stationary the steering is really good but when I am running the car at any sort of speed I loose a lot of steering. It's as if the servo no longer has enough power to turn the steering.
the car is running a 1521 1Y with a mamba XL on 6s

Any ideas guys

[swiftneed]

did you check your remote to make sure the steering is in full position meaning the settings for the steering servo the next thing you want to check is the your tires the allen set screws for the camber may be too tight loosen them up a bit and try the steering, take off the wheel there should be Two set screws good luck