FJ 80 mid differential (1 Viewer)
- Thread starter revream
- Start date
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revream said:
Hi and you are very welcome to the forum. Can you explain exactly what you mean by not going into gear, do you mean you get no drive and cannot progress? Do you mean switch on the CDL switch or off? Are you stationary at the time or moving?- Thread starter
- #3
Hi Gold Finger, And thank you for the welcome and the reply. When I am setting still no foward movment and the trasmission is in netrual. I push the mid dif button on the dash so that the indicator light is off. Then put it into drive and there is no forward movment. Just a slight slight grinding sound like gears are close but not engaging. Then I put it back into neteral and push the mid dif button again and the indicator light comes on on the dash and trasmission is put in drive forward movment is just fine.
revream, I think we need to know more about your cruiser. Give us some details, mileage, use, mods, previous related issues/maintenance, etc.
R
robbie
Guest
So a list of problems that fit your discription, front diff is bad, birifeld shot, drive plate on wheel hub shot, missing ft drive shaft, possiable VC not locking up, maybe a bad t-case. Yes a discription of your vechicle is always nice to help the guess. but other than the stuff I have written not much else can create your problem. Where does the noise come from? later robbie
check the flux capacitor. when the flux capacitor is turned on, it is in the eight dimension and uses the hierarchical structure of the cosmos as a timer!
jk. i have no clue im a noob but sounds like a s***ty problem -- good luck
jk. i have no clue im a noob but sounds like a s***ty problem -- good luck
and -highly unlikely and downright miraculous....- might it go away if you were to just wiggle the Tcase stick back and forth a few times between high and lo, making sure it's really engaged properly... you gotta push hard... ?
well, at least it's cheap to try...
E
well, at least it's cheap to try...
E
Sound like this vehicle is only operating in 2 wheel Drive and needs the diff locked to prevent the differential from spinning uselessly. We need to know were the sound is coming from, the transfer box or the axle. ( guys could it be the output shaft?)
check the front drive flanges(where the locking hubs would be if it had them), sounds like one is stripped. This EXACT thing happened to me 6 years ago, sounds like the noise is in the t-case and it is but thats NOT what is busted. Seen 2 other local 80 with the same problem, Toyota said t-case in all cases, I said drive flange, I was right both times, cost $30 for a new flange.
what is happening is, when the center diff is open, the diff is trying to send all the power to the front axle, but as the front axle is spining the cruiser won't move and they center diff makes some nasty noises. When you lock the center diff its now sending power to the rear so you can move.
I will almost bet money this is what is happening.
what is happening is, when the center diff is open, the diff is trying to send all the power to the front axle, but as the front axle is spining the cruiser won't move and they center diff makes some nasty noises. When you lock the center diff its now sending power to the rear so you can move.
I will almost bet money this is what is happening.
Pimp, sounds to me like you are onto something......not on something, just on to something.
softer metal then the axle stub, being under power 100% of the time, just because its better then something more expensive letting go.
could also be a bad front diff but I doubt it.
could also be a bad front diff but I doubt it.
Rookie2 said:
I second the drive flange/s............
- Thread starter
- #15
thanks guys for the jokes and the advice. it is a 91 fj80 with 58000 miles. I got it from a body shop after a front end collition and put it all back together. Thanks pimp for the guess and the dif discription. It does have front lockers on it. does it still have the flanges if it has the lockers?
It's a '91 with lockers? Factory Lockers? (To my knowledge factory lockers were not offered until '93). Or are you talking about locking front hubs. If you're referring to hubs then the part that could be stripped (if the stripping is correct) would be part of the hub...or, the hub just isn't engaged (not saying it's not turned, but could be broke internally so it's not actually engaging).revream said:
Good Luck...58K original miles? Jeebus that's low!
revream said:
Since it is a 91 it does not have an OEM front locker or it has an aftermarket (e.g. ARB) locker. I think you would know it if there was an ARB locker.
Therefore, it has the aforementioned drive plates (flange) that Robbie mention in his first post above.
-B-
revream said:
If had an ARB locker, you would know it.
Front locking hubs were not OEM. If it has them then is sounds like one or both of them is not working, or more likely, someone unlocked them and now the truck won't move without the center diff engaged.
-B-
- Thread starter
- #20
The hub locks have the words Super wench printed on them. i can select one of two positions one that is labled 4X2 and the other that is labled 4X4. When the mid dif lock is off and the hub lock is set to 4x4 the grinding noise is in the front hubs. when the mid dif lock is off and 4x2 is selected the noise sounds like it is in the transfer case. should I just can these after market hubs and go back stock?
