Hi every one.
So I'm having an issue with my 89 xj.
It runs fine don't get me wrong.
The only thing that bothers me is when I'm climbing a hill at highway speed (100kmhr ).
Obviously I'm not going to do that in 5th. It has enough jam to maintain 70-80 in 4th.
Now the thing is if I need to accelerate I drop to 3rd it'll pull but not until I hit 2800 then it grows a pair and takes off. Is this normal or am I missing something?

 

I had an 89 XJ years ago also,(figuring urs is the same) it had 3.07 gears, big tires, a little more steel on it here and there. I started to loose 5th gear on any incline.. 4th seems to do it better. I bot a scrap jeep and took the axles off , they had 3.73 gears it made a big difference. 5th gear was usable again. This could be ur problem too... have u done any modifications like big tires. etc??

 

Yes. Just slightly bigger tires. 31s.
That's a good point. I didn't think it would make such a big difference. Not like I put on 35s