When i get right at 85 MPH on the high way my truck starts to vibrate bad. was wondering what it could be?

re balance? broke belt in tire? bent wheel?... my first step would be inspect tires and wheels

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MY BUILD THREAD
1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..

alignment?

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Mods to come: Camburg entry 6.0 system. FiberwerkX Fenders and bedsides. Tube bumper.
R.I.P. Jeff Ashton. 1992-2011

Um not to sound like a smart ass but it is a truck lol. At high speeds like that I am not surprised you get a vibration or shake or rougher ride. If it is a violent kind vibration then you may want to investigate further but it doesn't sound that abnormal to me. Can you describe it a little more. where exactly does it feel like its coming from...if you can tell. Steering wheel? Seat?

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CURRENT: 2015 Tacoma DCLB TRD Sport

Why you going 85 in a ranger?

maybe the speed limit in PA is 85? oh it's not.

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2001 Ranger Edge 4x4 (sold)
2006 F150 Lariat 4x4 (sold)
2007 Explorer XLT (Destroyed by Deer on highway)
2014 Explorer XLT (inherited from parents)

solution for OP - keep it under 85.

Problem solved

Its not like its impossible to go above 85.

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YZ the way to be!
The Brotherhood!

Mods to come: Camburg entry 6.0 system. FiberwerkX Fenders and bedsides. Tube bumper.
R.I.P. Jeff Ashton. 1992-2011

Going to school and driving on the highway sucks if you dont go more than 80 for two hours away. and the vibration feels like it is coming from the front end of the truck. And yeah pa state limit is only 65 which sucks

Also check the wheel bearings

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You could check for play in your ball joints and tie rods as well.

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