i dont know whether or not to change my trans fluid i know in autos if its spent it could be worse to change it is it the same in a manual, it is pitch black

Yes, you need to change it. Every 60,000 miles with Mercon ATF or Mercon V ATF depending on the year of your truck. Also, if you don't have any manuals (the info is in there) you can get electronic copies from the Ford site in the service section. I believe there are also links to the manuals on this forum.

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Sgtsandman's Work in Progress
2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
2019 Ford Ranger STX FX4, Super Crew, 2.3L Ecoboost, 10 speed automatic, 3.73:1 with rear locker, Leer 100XR cap

I was curious about the manual trans fluid change.
chilton says that the fluid should be good for the life of the trans
manual says 60k i believe.

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2007 FORD RANGER XLT EXTENDED CAB - 4.0, 4x4, 5sp
Ultragauge, 10" L7 W/ 2200W PA Amp, CB W/4' Fiberglass whip, PA system, LEER shell w/led 3rd brake and custom remover, LED taillights in mudflaps, 5K 55W HIDs, Aux reverse lights, DIY bed liner, Hellas, Bed mat (cut up livestock mat).

Definitely not good for life. Now if you have 75W140 synthetic in the rear axle, it is according to the owner's manual. Chilton's and Haynes manuals are better than nothing but you have to verify the information they provide.

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Sgtsandman's Work in Progress
2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
2019 Ford Ranger STX FX4, Super Crew, 2.3L Ecoboost, 10 speed automatic, 3.73:1 with rear locker, Leer 100XR cap