2nd gen 94 4Runner 4x4 not working

So it was working when I would put it in 4x4 but yesterday I took the truck out and put it in 4L and it won’t engage in the front but the rear was engaging uh kind of not sure what’s going on here so maybe you guys can help me.

I also check the vacuum for the add and there is little air coming from it but not too strong so that could be the problem maybe???

 

Ok well take it one thing at a time logically....if you're truly getting 4wd in 4hi then you're also probably getting sufficient vacuum in 4lo, but you could check the vacuum in both hi and lo.

What I see is your mention of no front engagement in lo AND intermittent engagement in the rear. This suggests that the shift forks in the transfer case are not fully traveling when you select 4lo.

There's a fork which engages the front d/s output AND a separate fork which engages the gear reduction for low range. I don't know if you have the gear driven or chain driven t-case but you can see the front output fork around 12:30 and the range fork around 23:00
https://youtu.be/4wbdxT3I72E

However, before assuming internal t-case problems I'd look carefully at your shifter linkage and all associated bushings. These linkages don't use a lot of throw/travel to engage various positions, so a little slop in a bushing can be the difference between engagement and partial engagement

Post back what you find, it'll help everybody