Axel Wrap? Slave Cylinder? Transmission? or is it my Lockers.

Thanks for reading and helping if you have time. Once I get this thing figured out whoever gave me the most helpful comments and insights will get something - coffee, a set of lights, tools, etc... I'm not sure yet (there is your incentive

Here is the deal. (picture attached)

I own a 2000 SR5 Tacoma V6 4x4 manual, 2 piece drive line (after market locker... I think) that has bump/weight load shifting issue - I know its vague, stick with me though.

I am experiencing a "bump" when I load the drive line.
Also when I turn around (tight circle) in a parking lot (to the left) the locker engages on-and-off, on-and-off, on-and-off, on-and-off, till I either straighten out or floor it causing it to lock out of anger and peeling out.

This problem has become worse over time i.e. the bump is getting harder.
Note: the bump only occurs when loading the drive line.

My investigation has led me to just start throwing money at it.

• I reviewed the pinion bearing (good)
• Replaced both the front and aft u-joints (now good)
• Replaced the clutch (don't ask)

There is little to no play in the carrier bearing, BUT when loading the drive line, the it shifts (vertically in the carrier bearing carriage -up to be exact).

I am completely stumped and so are the people I have taken it to. (leave that to Spokane).

This is what I have heard and I need your opinion and advise to help me think/work through this.

1st Guy: Does it bump as hard in four wheel drive?
Me: Nope, in fact it doesn't do it at all.

2nd Guy: Does it hit harder when you reverse - brake - shift into first - and move forward?
Me: YES Twice as hard.
2nd Guy: I think you have chain play in your transfer case.

3rd Guy: Toyota Transfer cases are bullet proof.

Here are some of my thoughts:
1. I am new to the locker world and they apparently blow to drive.
2. My transmission mounts or engine mounts are failing.
3. I am experiencing some sort of axel wrap do to an issue in the rear end.
4. I notice this evening when doing more research there is an oily substance coming from a top the transmission? No idea.

5. Writing this post is just making me frustrated about the issue and the money I have spent.

Please advise

- Puzzled and Perplexed Taco Owner

 

Ok lets start with simple question...
Do you know what locker you have? It sounds like Lockright?

 

The locker was installed by the previous owner from the guy I bought the truck from. A transmission tech in Seattle thought it may be a Dyna. Anyway for me to check with out tearing it apart?

 

I estimated I had axle wrap after researching more and more.

Easy fix (at least for now), I placed two C-clamps on either side of both leaf springs. Definitely tightened up the rear-end and got rid of some of the flexing in the bumping, i.e. the bump does hit as hard.

Now the sound and the mechanical click, thud* - happens when I depress the clutch pedel and let it out. So I feel as though I have eliminated the rear axel. I also check the carrier bearing again and it seems to have little vertical flex, meaning the flex I was witness visually was from what I did not understand as axel wrap...

Now to the clutch clunk and thud. Is this depression of the clutch followed by the release and engaging thud the sign of a failing master cylinder or slave cylinder? I am ruling out the clutch and fly wheel because they replaced no more than a week ago.

Please help.

Thanks,

 

Put it in 2wd have have the rear end on jack stands (tires removed) and try making it clunk and listen where it is coming from.

It's really hard to diagnose the problem because of how many variables it could be, but best bet is to jack it up and try to get it to make a noise.

Edit: My old locker (Detroit) would make an obvious noise of it engaging and disengaging, can you record the noise too possibly?

 

Sounds like it may be a bad transmission mount. Do you have the bump when you push the clutch in to shift gear (ex. 2nd to 3rd)?

 

What does the transmission mount look like? Is the bushing look shot?

 

use caution when doing this I cannot be held responsible if you hurt yourself

1. find some level pavement park truck on said spot
2. chock both front wheels fore and aft but not tight to the wheels (so you have a little wiggle room)
3. put trans in "N" slide under truck but not too close to rear wheels and grab dshaft between slip yoke and pinion
4. twist back & forth see if you can hear the noise
5. now try in gear 1 thru 5 & r

if its in drvline you should hear or eliminate