I have a 96 XJ 4.0 5 speed manual and it shifts fine until it warms up and then it feels sticky, like its harder to get from gear to gear. It this the clutch? Or the clutch master cylinder which I replaced once and did very little good, or both? Any tranny guys out there? This is probably a silly question but hey, I am a newbie!

 

Any idea what kind of oil was put into it?

 

I had that same problem with my cuz jeep, replaced clutch and slave bleed out system, it would shift fine when cold then when hot wouldn't be able to even shift till it sat for a while. Replace master and bleed and still same problem. What I did was one of the techs at work told me to pull the master out and stand it straight up and bleed it. The hose from the master to the slave would catch a air pocket right in the line above the booster as it goes down. Did that and problem went away.

 

No idea on oil....

 

See, that's the kind of stuff you can only learn from the real world. Thanks for sharing that one! I'll try that.

 

If you can happen to get a hold of a mighty vac with air it will pull all the air out and it can be done by one person just make sure to check the master. If not two people will have to do.

 

Ever change the oil in the tranny ?

 

X2
If you don't know what fluid is in the transmission, change it! One of the problems with manual transmissions is contamination, heat & cool cycles, over time fluid needs to be replaced, also a if the fluid is a 70/85w maybe a 75/90wwould help.

 

[QUOTE=hbracing13;2624172]If you can happen to get a hold of a mighty vac with air it will pull all the air out and it can be done by one person just make sure to check the master. If not two people will have to do.[/QUOTE]

if you do this def have someone help you.. that mighty vac will
suck that system completly dry real quick..

i just went through this

 

You can pick and choose oil with the ba/10, with the ax-15 (what you have) do not run anything but redline MTL, it's 70w-80 synthetic.
Any other oil and I guarantee it will shift like crap, especially in the winter, Second gear will seem stuck in the winter.

 

Try some royal purple syncromax, stuff works awesome is a bit spendy though. Do the xjs have the rubber accordian shifter boot too?

 

" ax-15 (what you have) do not run anything but redline MTL, it's 70w-80 synthetic "

THIS. Redline nothing else.

 

MTL is for cooler areas MT 90 is for warmer areas, since the OP is having problems when the transmission has warmed up I would suggest a 75/90w over a 70/80w, but of course I would go with Redline MT90.

 

Would 70 over 75 really make that big if a difference? But I too run the 90

 

It could make that much difference. I ran an 80w, and had problems in summer with shifting, changed to 75/90w and no problems until winter temps dropped to around 0.
Then I needed to drive slowly for maybe a block before shifting so the transmission warmed up some.