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View Full Version : Loud Pop! Then the sound of metal rubbing!


Evrgrnmtnman
12-27-2012, 03:17 PM
Okay, so I'm driving home last night in my 88 Toy Pickup. I have my front hubs locked, but NOT in 4WD though. Than I hear this lound bang, and then metal rubbing. So, I turn off the road, pop the hood. The engine sounds great and runs fine, so I'm thinking it something to do with the front end. So, I unlock the hubs and get back in the truck and it drives home fine in 2WD with the hubs unlocked and no noise. Today, I lift the front end up and lock the hubs, the passenger side tire turns easy with no problems, but the driver side tire is hard to turn. So, I'm thinking CV joint, hub, U joint or something. I think the diff is fine, no noise coming from there. Keep in mind this is a indepedent front end.........
Any ideas of what happen and needs replacing??"
CJ

RicardoJM
12-27-2012, 04:08 PM
...Any ideas of what happen and needs replacing??"
CJ

Two part question, ok - I'll play.
1) Something broke. 2) The thing that broke.

When you had it up and the hubs locked, was the transmission in gear or neutral? If it was in gear, the tire that did not move makes sense, i.e. it is locked and the tire that did move is where you want to look closer. You might want to remove the cap from the hubs and see what condition they are in. It could be one of them failed.

DaveInDenver
12-27-2012, 04:13 PM
Does your truck have ADD or was it manual hubs from the factory? The front end sliding gear on ADD is on the left side and could have broken.

Can you move the CV joint on the back of the hubs or at the diff? I'm talking about side-to-side, not in and out?

Have you tried turning the half shafts with the hubs unlocked? Should be easy to turn and the opposite side should turn backward or the front driveshaft might turn. If you lock the t-case in 4WD, the other side will definitely turn. There should be no binding and you probably will feel the ring gear turning the pinion.

I'm going to guess that the end of your axle sheared or your hub shattered and is jammed in the spindle. Were the hubs warm when you locked in the hubs or was the grease cold still?

Evrgrnmtnman
12-27-2012, 05:41 PM
Two part question, ok - I'll play.
1) Something broke. 2) The thing that broke.

When you had it up and the hubs locked, was the transmission in gear or neutral? If it was in gear, the tire that did not move makes sense, i.e. it is locked and the tire that did move is where you want to look closer. You might want to remove the cap from the hubs and see what condition they are in. It could be one of them failed.

The truck was in gear. There Asin Manual Locking hubs, the dial on the driver side has always been hard to move, if that means anything......I'll remove the hub caps this weekend......

Evrgrnmtnman
12-27-2012, 05:44 PM
Does your truck have ADD or was it manual hubs from the factory? The front end sliding gear on ADD is on the left side and could have broken.

Can you move the CV joint on the back of the hubs or at the diff? I'm talking about side-to-side, not in and out?

Have you tried turning the half shafts with the hubs unlocked? Should be easy to turn and the opposite side should turn backward or the front driveshaft might turn. If you lock the t-case in 4WD, the other side will definitely turn. There should be no binding and you probably will feel the ring gear turning the pinion.

I'm going to guess that the end of your axle sheared or your hub shattered and is jammed in the spindle. Were the hubs warm when you locked in the hubs or was the grease cold still?

Manual Asin hubs. The hubs had been locked since the morning. So they were already locked........was very cold.......I will take the hubs off this weekend and have a lock. Don't see any snow in the forecast, so probably go with 2WD till Sunday

DaveInDenver
12-28-2012, 05:10 AM
I want to change my answer. Were you by chance steering when the bang happened? Thinking one of your CV joints broke in the axle.

Evrgrnmtnman
12-28-2012, 06:23 AM
I want to change my answer. Were you by chance steering when the bang happened? Thinking one of your CV joints broke in the axle.

I was going straight down the highway.......any Toyota mechanics up in Boulder or Longmont??

MountainGoat
12-28-2012, 07:15 AM
I was going straight down the highway.......any Toyota mechanics up in Boulder or Longmont??

Only one of the best: Robbie (http://www.risingsun4x4club.org/forum2/showthread.php?t=10843) has a shop in Boulder.

Evrgrnmtnman
12-28-2012, 08:18 PM
The Problem! The collar on the passenger side of the diff. where the axle shaft goes into the diff. separated from the diff completely.......

L43dean
01-02-2013, 06:26 PM
The Problem! The collar on the passenger side of the diff. where the axle shaft goes into the diff. separated from the diff completely.......

Could be time for a solid front axle conversion.

Evrgrnmtnman
01-02-2013, 10:39 PM
Could be time for a solid front axle conversion.

Thought about that, but $$$$$

DaveInDenver
01-03-2013, 05:56 AM
Did the right side stub pop out?

This part.

31639

There's a $5 c-clip that holds it in.

31640

It should take some effort to get it back in, if not it's worn, missing or broken.

31641

DaveInDenver
01-03-2013, 06:28 AM
Or are you saying there was something that actually broke? The housing or the side bearing on the diff disintegrated?

There is an oil seal on the side, should be part number 90311-47012 (it often leaks so I've replaced it a couple of times). Maybe that just came apart? This is common because the right side axle is not well supported on non-ADD trucks and can wobble, particularly if the c-clip is broken and the axle can move more than normal. IIRC it should be about $10 from Toyota.

If it's just the seal, it's not a difficult repair. Getting at it is tougher, particularly with the diff still on the truck.

31642

31643

If it's something in the diff itself and you are running stock you can get front diffs for nothing usually. Even built ones aren't worth much. I ended up selling my front Air Locker + 5.29 diff for I think $250. I got the stock open + 4.10 for a 12 pack of Coors Light.

FWIW, these photos still show the studs pressed in. I just use bolts now so it's much easier to R&R CV axles, especially the right side one.

Evrgrnmtnman
01-07-2013, 01:52 PM
You are correct, that is what popped out!


Did the right side stub pop out?

This part.

31639

There's a $5 c-clip that holds it in.

31640

It should take some effort to get it back in, if not it's worn, missing or broken.

31641

Evrgrnmtnman
01-17-2013, 02:17 PM
Turns out the axle shaft broke in half inside the diff........bummer!