I Have A 2005 G35 , Base Model.. I Recently Had A Motor Swapped Out & The Car Ran Good Until The End Of The Day.. First It Started With My Sunroof Not Wanting To Close(sunroof Never had problems) , Then My Car Started Shifting Out Of Gears Hard(jerking like) & At 3 Gear It Doesn’t Shift Out Anymore But Before The Motor Job , I Never Had AnY Transmission Problems Nor Seemed To Have One Before The Motor Swap.. The Next Day Comes & I Take It Back To The Same Shop & After 10 Mins Of Driving The Car It Rode Normal Then Started Back Shifting Gears Hard & Not Shifting After 3rd Gear.. So I Get To The Shop & Park To Check My Transmission Fluids & My Mechanic Noticed My Reverse Lights Where On In “Park” But The Car Wasn’t Movin In Any Motion As If It Was In Drive Or Reverse So We Shut The Car Off & Tried To Crank It Back Up & All It Did Was Turn Over But No Start.. Then We Noticed My Car Security Light Was On & My Fans Instantly Came On While My Key Was Turned Forward To Where All The Dashboard Lights Were On.. I Was Told The Computer But I Feel As If It’s Something Else & I Don’t Wanna Order An Expensive Part & It Dont Solve My Problem.. Any Suggestions On What It Could Be ?

 

Holy crap dude. My eyes hurt trying to read that śhit.

 

All U Gotta Do Is Read It😁

 

I would take it back to the shop and tell them they need to fix whatever they phucked up, or give me my money back.

Sounds like some major electrical issue.

 

THAT part