Sudden noise, whining in 1st gear, reverse jerky

Probably issues with Shift Solenoids. You need a transmission specialist or an auto electrician with a pro grade bi-directional scan tool computer that can tell the solenoids to operate and confirm that they did. Or it is the powertrain module that is at fault.

check and/or change the transmission oil. Clutch problems are noticeable in 1st and reverse but as all the rest are syncro controlled you really do not need to use the clutch to change them. just get the engine rpms to match road speed and they will slip in. I am thinking a oil viscosity problem because of the colder weather.

Thanks guys

USE A SCANNER TO CONFIRM WHETHER HAS ANY SOLENOIDS HAD TO DO WITH.

Your pressure plate must be weak and about to let go.

It is a 5 speed manual transmission? If it is noisey in all gears except for 4th, then the problem is countershaft bearings.

check shift fork adjustment. make sure you bleed the slave cylinder.also check shift cable adjustment.

i had a nissan pickup that would whine in all gears except 4th...it started out with 1st then reverse then went to the rest...solution was new transmission...or rebuild cause the syncronizers or the gears them selves are being chewed up...the new transmission was cheaper then a rebuild. or take it to somewhere that will do free diag on the transmission.

Suspect would be the clutch. If there is not grinding in any gears 1st 2nd 3rd 4th 5th and reverse when you give it gas, then i would check the clutch.

It seems in the manual transmissions the first gear to go is 3rd gear..
signs of a failing trans