Question Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-13-2019, 01:45 PM   #1
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I just changed my Manual T90C (three on the tree) Transmission and Model 18 Transfer case fluid that was BLACK and VERY THICK when draining out. I replaced with Valvoline SAE 80W-90 Gear Oil (Reccommended API service GL- 4, GL-5 non synch manual transmissions.

Prior to changing the fluid, I could shift into 1st gear with ease. Now, It seems the gears are moving when the clutch is fully depressed that I can't get it in first without severe grinding. I can put it into second no problem, then quickly shift into first without releasing the clutch to get it in first. Is this a simple clutch cable adjustment? the temp was cold at about 30 degrees today. But ran the jeep for 10 miles and still had the same problem when warm. Ideas? Best, Jeff

 

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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-13-2019, 01:50 PM   #2
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Did you fill to the top of fill plug.
3 on the tree is well known for linkage issues. Oil the linkage 'joints'.
How much free travel do you have in the clutch pedal? You want 1"-1 1/4".
How worn if the clutch linkage?
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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-13-2019, 02:37 PM   #3
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I filled with rect'd fluid levels per manual. I think your suggesting to fill until leaks out of both fill plugs? I'll check linkages as well. I do have about 3"+ in play with the clutch until I feel tension engaging.

 

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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-13-2019, 06:55 PM   #4
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3" is too much. The clutch is not fully disengaging before your foot hits the floor. Do as Lumpy suggested and adjust the freeplay to 1" to 1 1/4" and you should be fine.
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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-14-2019, 10:40 AM   #5
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As suggested, adjust linkage and fill with gear oil until its starting to run out of fill hole and all should be well

 

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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-14-2019, 11:28 AM   #6
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YES-Fill till oil runs out of fill plug. This is pretty much SOP.
YES-3" of clutch pedal travel is WAY to much.
LG
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Default Re: Changed Fluids in Trans and now cant get into first gear?!?!?!? 

Old 01-28-2019, 09:38 AM   #7
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Quote:
Originally Posted by Lumpy Grits View Post
YES-Fill till oil runs out of fill plug. This is pretty much SOP.
YES-3" of clutch pedal travel is WAY to much.
LG
thank you guys. that was the trick.

 

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