[bokch0y]

i have a 91 sr5 4x4 pickup with the v6.

When i'm in regular 2wd mode, the truck drives fine forward and backward. Moves smooth.

When i toss in into 4wd mode, the truck seems "tighter", light it's dragging or something. When i try to reverse in 4wd, it's even tighter than when i move forward. Almost like driving with the ebrake on.

Any ideas on what the problem is? New to trucks and especially 4wd.

Thanks.

 

[TNRabbit]

Do you have different size front/rear tires?

OR, if the gear ratio in the differential was changed in the front & not the rear or vice versa....

 

[bokch0y]

tires are the same size front and back. And the diff gear ratios are the same from my understanding.

Could it low fluid or something?

 

[fourwd1]

If you are doing this on any kind of solid or paved surface, that's the problem.

 

[bokch0y]

^^^

really? could u explain to me why?

Thanks

 

[Zembonez]

Any turn while in 4WD will cause some binding on hard surfaces. The vehicle is trying to turn all four wheels and they are turning at different rates. 4WD is made for loose surfaces.

 

[fourwd1]

Like ZB said, the part-time 4WD system in early trucks is made for loose/slippery surfaces.
A hard surface causes the entire driveline to bind up, esp when trying to turn.
And it's more evident in Low range.

 

[Zembonez]

AND... it's a good indicator that the system is working properly!

 

[bokch0y]

Ooooo icic. didn't know that. i had a 93 and it was fine in 4wd for turning and wahtever on dry pavement. So i was under the impression same thing for the 91 :dunno:

 

[kamesama980]

They should be the same. Just going in a straight line, it'll be easy. go around a corner and it'll bind up so something's gotta slip. the 4wd is trying to spin each wheel the same speed but different radius circles and all that causes it to seem like the ebrake is on.

BTW in your first post you say new to trucks and 4wd, then your last post you say you hada 93 4wd. Which is it?

 

[bokch0y]

New to trucks.

i bought a 93, had that for about 3 weeks and then picked up the 91 becuase it was in better shape, 100k km less mileage and is the SR5 instead of the DLX, so power options, sunroof etc. Again the 93 i had for 3 weeks, put about 1200km on it, the 91 i've had now for about a month or so, maybe 5 weeks, but i've only put about 300km on it as it needed new contacts and plunger installed in the starter(which I did) and the clutch is on its way out...like 1" from grabbing from the top on its way out haha. Crazy thing was my 93, the clutch grabbed 1" from the ground (have a thread about this somewhere)...if you put both trucks together, i'd have the perfect truck o_o.

Anyways so asking about what i clearly have no idea about. No need to interogate...not here to sell stuff and scam people, just want to get my truck running 110%

 

[kamesama980]

haha just trying to figure out where you stand lol

My clutch is like that too (engages high) but it was laying around the garage and half shot from being in at least 2 previous cars (got it used as a FW, PP, clutch set on here like 5 years ago. Seller hadn't machined the FW with a step so the car couldn't get over 40 it slipped so bad) with nothing but a properly stepped flywheel it's pulled 5k+ lbs trailers over 300 miles interstate....twice

So the new one (91) is binding up even going in a straight line in 4WD but is fine in 2WD?

1. hubs are bad
2. front diff is bad
3. t-case is bad
4. someone swapped ONE differential with a different gear ratio one. (look about 4-5 months back, someone on here did it, drive into a ditch, and was dumb enough to try 4wd to get out with mismatched diffs. Yes, it broke)

I'd say jack the truck up off the ground and start trying to turn things in 2WD and 4WD...front driveshaft, each CV, wheels, etc.