Surging

[Sir Jacob the 2nd]

So the MJ surges forward while I'm slowing down as the aw4 downshifts, Is this a normal condition and if its not is there a fix?

 

[HOrnbrod]

That can happen when the POWER/COMFORT switch is in the COMFORT position, and/or the AW4 TV cable is out of adjustment.

[Sir Jacob the 2nd]

You know I haven't happened to notice which position the switch is in, thanks Don I'll check that first.

[Sir Jacob the 2nd]

Just a quick update, switched the comfort/power switch to power, surging dramatically reduced, thanks for the input!

[Minuit]

I've never had mine do that when the switch is in COMFORT mode and I know the switch works. Have you also tried adjusting your throttle valve cable? Might make it even better.

[gogmorgo]

I'm not sure I would describe it as "surging" but my aw4 (both of them) always seem to hang a bit more between gears in comfort mode than I'm comfortable with.

If you're decelerating in gear, I can see that brief moment between gears feeling like a surge I guess.

[Sir Jacob the 2nd]

I'm fairly certain the pump is bad on mine, I have replace the front oil seal twice in the last six months and it still leaks and I have a vibration when I let off the accelerator. I have brand new moog U-joints in the driveshaft new front wheel bearings and new tires on the truck so all of that has been eliminated as the cause of the vibration so, with the leak and vibration I am fairly sure my pump is bad. 

 

That being said I have no idea how much (if at all) that could be contributing to the "surging" but when I am decelerating and applying the brakes as the tranny downshifts, RPMS seem to raise considerably. I don't have a tach so its hard to say exactly how much. but its to the point that it almost overwhelms the brakes pushing me forward. That's what I mean when I say it's surging. 

 

Like I said flipping the switch to power has helped considerably. It's not completely gone but it at least feels safe to a point that I am comfortable driving it in town.

[HOrnbrod]

Try adjusting the throttle valve cable next. The procedure is at the end of this link:
 

http://www.lunghd.com/Tech_Articles/Transmission_and_Transfer_Case/Transmission_Throttle_Cable_Replacement.htm

[Sir Jacob the 2nd]

Thats a great write up! thanks I'll check that next