Topic: 88 Toyota Pickup 4WD Vibration issues shifting into 2nd gear.

[beans20]

So I have slight vibration when shifting into 2nd gear from 1st or 3rd, doesn't matter which, also happens when I apply slight pressure to the brakes. You can also feel slight vibration when taking a right turn, not Fast and Furious 7 fast, normal speed. If I press the pedal a little harder it's fine. About 4 days ago I replaced all the bearings and seals in the rear diff along with drums, shoes, and wheel cylinders. Initially I though the rear brakes were catching to much on one side and not the other, but I have readjusted the brakes and the problem still persists. When I replaced my diff oil I used Lucas Synthetic 75W-90. Is it possible that I need to use the limited slip additive? I need some help. My truck does not currently have a lift either. I also wondered if I had a little axle wrap starting to happen but I don't think that is the case. It is also quite possible I did not do enough research to find out the problem but I did and extensive amount before posting here (about 2 days worth). Trust me this is the last place I turned to get answers to my question.

[beans20 [OP]]

U-Joints are in good working order also.

[Mavericks]

Could be the carrier bearing if you have an xtra cab?

[beans20 [OP]]

It's a single cab.

[Snowtoy]

Where are you feeling the vibrations, steering wheel, seat, entire cab?

[beans20 [OP]]

My seat which is really weird now that I think about it. I also have another question has anyone else replace their rear bearings themselves? (Obviously I know the answer to that question.) If so when pressing the new bearing in did you push your bearing all the way in with the lock collar? Or did you just run it in far enough to put the c-clip on, and then when bolting the rear axle shaft back together let the bolts push the bearing where it needs to be?

[Snowtoy]

Vibrations in the seat are generally associated with the drivetrain, from the transmission output to the pinion, as it cycles through its movement under acceleration/deceleration.  The vibrations are generally caused from bad u-joints, or possibly out of balance/straight driveline, or misaligned drive shaft with trans or pinion flanges.  Some of the other times you are feeling the vibrations are likely not associated with the 1-2-3 gear shifts.

A little clarification on the bearings you replaced, do you mean the u-joints, pinion bearing, or outer axle bearings?

[beans20 [OP]]

Outer axle bearings. I put the additive in it seems to have done the job but I'm also going to go ahead and replace the trams fluid.

[Snowtoy]

The outer axle bearings(on the axle shaft), have to be pressed on, it is highly unlikely that they seated properly if you used the 4 flange bolts to try and seat them.

[beans20 [OP]]

No they were pressed in and not by some backwoods job either it was an actual press. But the guy that did it pushed the bearing and lock collar on just enough to fit the snap ring. I asked him if this was going to cause an issue he said it was fine. But once I went to put the shafts back in that's when I noticed they weren't pressed in all the way, but the flange bolts pulled it in the rest of the way. So I am wondering if there is still room for those bearings to be seated all the way in the bearing pockets.

[emsvitil]

I bearing should be pressed from the hub, not the outer ring.

Fully seating the bearing with the flange would have been seating it with the outer ring, and could have possibly damaged the bearing.

[beans20 [OP]]

That is kind of what I thought but of course some people don't have a clue what they are talking about. This being my first time ever doing this type of job I should've gone with my gut instinct. But I guess I'm a dumbass just like that guy. Oh well though I know this for next time.

[emsvitil]

Jack up the axle, take the wheels off and see if you can hear/feel a difference side to side when you spin the axle.

[beans20 [OP]]

Will do.

[beans20 [OP]]

Thanks for the advice.