97 AWD Trans Jumps

[mikecosta1]

My 97 awd mountaineer just rolled 150k miles and under a slight load, just at about 40 mph it will sometimes jump lightly, like a fishbite. I had it to the transmission shop and they could not make it happen. Seems like it needs to be on about a 15 min ride to happen. Any ideas? I would like to prevent any kind of catastropic failure if possible.. thx, mike...

 

[Opera House]

Does it only happen on hills and under acceleration when tach is at or under 2K.

 

[mikecosta1]

97 AWD question

Seems like I only recall it happening when driving a long slight incline. My tach only works sporatically so I do not know the exact rpms, but I would guess that it is probably around 2k. Acts like it doesn't know whether to go into overdrive or kick down to 3rd gear. Never noticed it before and I have driven that stretch many times... thx for any advice...Mike

 

[mikecosta1]

Any body have any ideas or suggestions?
thx

 

[natedogco2007]

this sounds stupid but check the driveshaft bolts. they might be a lil loose. i was getting a lil vibration and a lil jump in my moms 97 awd and then i checked the driveshaft bolts and sure enough they were loose. tightened them up and the problem went away really quick like and in a hurry. hope that's all the problem is.

 

[squd92expsp]

You might want to check on your spark plugs. My X was doing the same thing at just under 2k RPMs and went away completely after changeing the plugs.

 

[Bill Kemp]

When was the last time you changed the trans filter?

 

[mikecosta1]

Thanks for the suggestions. I will check this weekend.

I have been changing the transmission fluid and transfer case every 20k miles. Don't want to have to buy one of these babies!!

I also changed the Front and Rear differential fluids with synthetic to help prolong their life.

Again, thx for the suggestions.