pick up truck 4wd

[gonefishie]

My truck 4wd doesn't like it unless the wheels are slipping. On non-slippery surface it bucks a little and pull to the right. The 4 HI and 4 LO is engaage by push buttons on the dash. Also, it hard to get it to disengage from 4wd back to 2wd. I have to stop, shift to park and then back to drive or reverse and move a short distance for it to disengage. I used to have a 94 Blazer and the 4wd system is switch on the fly too but it doesn't behave like this pick up at all. 4wd can be engage and disengage at any speed and was smooth as silk, ice or no ice. Are all pick up truck 4wd system like that? cause I'm thinking about getting a different truck with better 4wd.

 

[JB]

Re: pick up truck 4wd

Is the make and model of your pickup truck some big secret, Gonefishie?<br /><br />Systems for managing 4WD differ a lot.

 

[Reel Poor]

Re: pick up truck 4wd

I would say first check that all your tires are the same size and air pressure is the same in all of them.

 

[mikecjn]

Re: pick up truck 4wd

I was thinking the same thing as Reel Poor was. It sounds like it is fighting the wheel ratio difference. <br />However my old 1993 Chevy Silverado would buck in 4low pretty good and you pretty much had to go straight which was fine at the ramps. 4 high was always ok.

 

[JRJ]

Re: pick up truck 4wd

Doesn't sound unusual to me. Only my full time Toyota is happy turning on dry ground. All my pickups were and are bad about turning on dry dirt or pavement. The one I had with front and rear posi was really bad.

 

[LubeDude]

Re: pick up truck 4wd

If you use your 4 wheel drive at the ramp. when you get it up the ramp and level again you want to take it out. They are not designed to use on dry pavement. They pretty much all do that on dry pavement. I have to push the button a few times to get my ranger out of 4 X 4.

 

[TTU_Guy]

Re: pick up truck 4wd

I'd have to agree that this all sounds normal. 4x4 should never be used for turning on dry pavement where you are getting a lot of good grip. The reason it is hard to take out is because of the axles being locked up and trying to slip on the pavement. I had this same issue with my previous vehicle that had the push button 4x4 and I went back to the stick on the floor with my new one.

 

[gonefishie]

Re: pick up truck 4wd

Well it ain't a secret JB, I just forgot, it's a 02 Tundra. The tires pressure and sizes are the same. I looked in the owner manual and it even stated that to engage/disengage I have to shift to park then to drive/reverse and move a short distance. That would kinda defeats the purpose of having switches on the dash to operates the 4wd. I wants to be able to take it in and out of 4wd while moving like the Blazer. I'm alive today because of being able to switch on the fly. Around here it's normal for the road and highway to have sections of dry pavement and other sections full of snow and ice. It's not really practical if I have to stop and shift. I thought there might be a different between SUV and pickup 4wd system. Seems like that is just the nature of pickup according to some of the posts.

 

[shipoffools]

Re: pick up truck 4wd

you have to check things out carefully today there are a lot of 4 wheel/ all wheel drive systems out there today and many of them behave differently then the old systems.

 

[Terry Olson]

Re: pick up truck 4wd

I think I can help here... <br /><br />Most 4x4 systems don't disengage until you've moved a short distance after taking them out of 4wd, whether by manual shifter or by button on the dash. Reverse works best because it results in the removal of the preload on the drivetrain. You'll find that after moving from 4wd to 2wd letting up on the throttle so that the truck is coasting briefly will accomplish the same thing. <br /><br />I'd be very surprised if you can't "shift on the fly" in your Toyota. In most instances when shifting on the fly you're limited to shifting into 4wd while moving at less than 35 mph but you can shift out at any speed. <br /><br />For what it's worth anyway.