4RocRunner92

I'm still having some trouble with the transmission, I took it back to the guy who worked on it to check the hard engagements I've been having. It only happens when I shift from R to D or D to R. When I go from D to D or R to R it is smooth as silk. The guy Frank said that this has shown that the transmission is not at fault here somehow. He said there was too much play in the differential and by that I think he means slack. So what does this exactly mean? What do I do at this point cause I can definately tell there is some "slack" cause when I'm driving and I let off the gas gently, I can feel it kick a little bit from the back. When I stop at a stop light or stop sign I have to ease my foot on the pedal because if I don't it will jerk and make a popping noise. If anyone could help that would be great.

Thanks.

seaflea

It sounds like the rear end is at fault here. Have you ever had it serviced or regeared?
From what you are describing, youre Ring and pinion are shot.

4RocRunner92

Damn, yeah I got 4:88's in it. What should I do? 5:29's?

seaflea

5.29s will not solve the problem. If you go to 5.29s then you will have to change both front and rear diffs. You need to have new 4.88s properly installed.
How long have they been in there?

4RocRunner92

Around 10,000 miles? Maybe more.

seaflea

Wow! there seems to be a problem there. I have over 150,000 miles on mine and have never had a problem. Maybe you ca ntake it back to the guy that did it and see if he will do anything for you.

4RocRunner92

They are Yukon gears. What if he tries to give me a problem?

seaflea

I wouldn't have im set them up again, he may wnid up doing the same thing.
I recall a thread a while back about some bad gears, so it may not be the installers fault. Here is the link...
could be some good reading for you.

4RocRunner92

Is this something I need to fix immediately?

Brendan

how are the ujoints? grab the driveshaft and see how much play it has

seaflea

Thanks! I just spent the weekend replacing mine and I didnt even think of it being the culprit!
The u-joints could definately be the problem. Check those before you spent the cash to regear.

PirateFins

Send "Zuk" a PM. http://www.gearinstalls.com/. He is a member here and is very familiar with 3rd members and their set-ups. He can lead you in the right direction as to what to check and so-forth. Also like the other guys recomended inspect your u-joints.

NCSU-4runner

if the gear setup was bad i think 10,000 miles on them along w/ wheeling forces would have brought out the ghost by now, just my opinion. I made a mistake installing a locker a couple years ago and the diff blew up about 200 miles later.


ive been in lots of vehicles before that had a slight jerk when shifting the auto into drive from reverse and vice versa. Do you make sure to always have your foot on the brake when you do so? the backlash in the gears (which is a measure of how "tight" the gears are meshed) is so small that you wouldnt be able to feel the transistion from the pinion touching one tooth to the next without having the diff on a bench and carefully testing it by hand. If it WAS big enough that should mean your gears are absurdly sloppy and would have likely died long ago.

I say if your driveshaft is fine then Frank is blowing smoke up your butt and just not trying to fess up to a mediocre tranny service.

also, do you have an automatic or manual locker, or any locker at all?


my 0.02

4RocRunner92

I have a full detroit. My u joints are fine. I'm going to pull the 3rd member Wednesday and check back.

4RocRunner92

After reading what you guys said again I went outside to go for a drive. This time I pushed the brake pretty hard. It still engaged rough but the truck didn't jerk as bad. I normally do have my foot on the brake but not as much pressure is usually applied. Now this time it didn't always knock or kick like a bastard and sometimes it was smooth like it should be. I don't know if me applying more pressure stopped the vehicle from jerking but I could still feel and hear the hard engagements beneath me....what should I think now?


*EDITED*

4RocRunner92

bump.