Fourth Gear Replacement?

2008 CHEVROLET COBALT
136,878 MILES • 2.2L • 4 CYL • 2WD • MANUAL
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AZDANNO04
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I am replacing my slave cylinder and figured I check to see if I needed to replace the fourth gear since I haven’t been to get into fourth gear. It just keeps grinding but after three or four times if I get it a certain angle it will catch, but I know one night I was trying to get it in fourth gear when I heard a loud noise and it felt like I may have chipped a tooth or more on that gear. If you can help me how to get to the fourth gear if that's what I need to replace or I was told the synchro something?
May 6, 2023 at 6:50 AM
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STRAILER
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Sure, here is a video that shows how to get the transmission out and I have included the transmission rebuild diagrams in the images below:

https://youtu.be/6N6b5F2ChyE

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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May 6, 2023 at 12:14 PM
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AZDANNO04
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When I loosened the axle out on the driver’s side I captured over four quarts of transmission fluid.
May 13, 2023 at 4:56 PM
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STRAILER
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Good job, you don't want that to run out all over the floor.
May 15, 2023 at 9:47 AM
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AZDANNO04
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Is there any other steps to proceed to the gears I was told that every gear has a syncro? Right now I am at the flywheel.
May 15, 2023 at 12:29 PM
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AZDANNO04
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Question about the quantity of fluid in the transmission? I thought it took less than 2quarts to top off the fluid. I just captured over 4 quarts when I removed the driver side axle.
May 15, 2023 at 12:54 PM
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STRAILER
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Fluid Types


MANUAL TRANSMISSION FLUID

GM Part No. U.S. 88861800, in Canada 88861801
Capacities


MANUAL TRANSAXLE

Complete Drain and Refill .................... 1.7 quarts (1.6 liters)

NOTE: All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck fluid level after filling.
May 16, 2023 at 12:15 PM