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Unread 11-30-2013, 10:26 PM   #1
goochieman83
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HELP!!!!! Trans failure

Hey guys, it's me again. You haven't failed me yet and I got another issue with my toy. So the other day I changed out the trans filter and cleaned out the old fluid (no clue how long it had been in there). Got in it today and put it in drive and....nothing. Have aftermarket lokar cable shifter hooked up and the linkage is fine, transfer case is in the right gear, and everything trans is full of fluid. Any ideas, need to drive!!!

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Unread 11-30-2013, 10:29 PM   #2
goochieman83
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Oh yeah, forgot to mention I have a th-400 tranny, if that helps.
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Unread 12-01-2013, 02:45 AM   #3
skizriz
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Did you pull the pan back off and make sure you every thing you did is correct?

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Unread 12-01-2013, 08:03 AM   #4
goochieman83
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Yeah, rechecked fluid, filter, and linkage, but still nothing. Let it warm up for about 10 min then ran through all the gears but nothing again. Won't even try to move. I'm stumped.
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Unread 12-01-2013, 08:21 AM   #5
skizriz
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I was thinking along the lines of the plastic pickup tube.
Theres nothing else i can think of.

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Unread 12-01-2013, 08:46 AM   #6
goochieman83
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Yeah I put it back in how it came off the old filter, it just slid into the top of the new trans filter and I popped the filter back on. Still won't move. Sitting in it now.
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Unread 12-01-2013, 10:40 AM   #7
Centerfire
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What tranny fluid did you use?
How much fluid did you put in?
It the motor running, and in neutral when you check the fluid level?
Is the vehicle on level ground when checking the fluid level?

Is there an o-ring on the filter neck?
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Unread 12-01-2013, 12:17 PM   #8
goochieman83
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Dexron III, fluid is full, nice and warmed up when checked, not sure about the o ring. About to drop the pan again and check that out.
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Unread 12-01-2013, 12:22 PM   #9
survivor
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How many Quarts of trans that you already put in it after replace the filter? It s suppose to be 4qts ( if you have deep pan add one more of qt).
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Unread 12-01-2013, 01:30 PM   #10
JeepHammer
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This SOUNDS serious...

Do you have a DEEP pan?
If so, did you put a spacer between filter and valve body suction line?

If you didn't space the filter DOWN to get into the fluid, you can be sucking air ABOVE the fluid in the pan and still show 'Full' on the dipstick.

DID YOU TRY CRACKING A LINE LOOSE TO SEE IF IT'S PUMPING FLUID OR NOT?
If not, I'm guessing the spacer didn't come with your filter kit, and you didn't move the spacer from old filter to new filter...
Just a guess, but I've seen it plenty of times before!
Customers are always relieved when it's just a filter problem and not a $1,500 Trans rebuild
(Since no respectable shop will offer a 'Repair' instead of rebuild and warranty it with the issues a TH-400 has with some internal parts)

If it is pumping fluid, then you start looking at 'Port Pressures' to see if the fluid is reaching the correct spots with sufficient pressure...

----------------------

The second thing I see once in a while, but not very often, is a SHALLOW PAN, with a 'Deep' filter kit installed.
The filter is socked against the SHALLOW pan since it's spaced DOWN for a deep pan, and the filter simply can't draw enough fluid being smashed against the pan to get things working.

-----------------------

There is a SECOND possibility that doesn't involve filters,
And that is you have shredded the 'O' ring on the center support. This is bad since you have to take the transmissions out and down to fix this problem,
And you will probably need a new drum and center support to fix the issue.

TH-400 is the all time 800 pound gorilla of auto transmissions, but all that strength comes at the penalty of weight in steel inside the transmission.
There is a center support to help handle that weight, and over time, the bushing in the center support gives up and lets the rotating drums come into contact with the NON-Moving center support.

This shreds 'O' rings and the fluid can't reach the clutch drum pistons anymore.
The drum and center support usually have galling wear meaning they have to be replaced also for the transmission to work again.
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Unread 12-01-2013, 04:00 PM   #11
lucdog
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Are you using a Quadratrac transfer case, and does it have a low range unit?

You didn't say, so I'm guessing the Jeep ran fine before you changed the fluid.

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Unread 12-01-2013, 05:18 PM   #12
goochieman83
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Didn't get a chance to drop the pan again today, but it is a shallow pan. I actually don't believe that I replaced the o-ring on the pick up tube or remember if there was one on it. The new filter I used came from O'Reilly. I pulled the old filter off put the pick up tube on the new filter and bolted back up the pan. Should have checked the o-ring on the pick up tube again. How deep is the deep pan anyway. Just to be certain.
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Unread 12-01-2013, 05:19 PM   #13
goochieman83
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It did drive fine before the filter change.
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Unread 12-01-2013, 05:20 PM   #14
goochieman83
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Oh and is a Quadratrac but is not hooked up.
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Unread 12-01-2013, 05:31 PM   #15
skizriz
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Quote:
Originally Posted by goochieman83 View Post
Oh and is a Quadratrac but is not hooked up.
What do you mean by " not hooked up"??

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