5.9L transmission problems !

[Gerald_Austria_EU]

Hi @ all !
I´ve a 98, ZJ with the 5.9L and hte 46RE transmission.
3 weeks ago the cooling line tub IN the ratiator broke. After changing the whole radiator and flushing the tranny and engine everything was ok.
I also changed the filter in the transmission.

2 weeks later hte problem occoured:
when the engine / transmission is warm/hot it´s like a clutch doesn ´t get the grip - no movement.
The mechanic - a specialist in us-auto.trannies - took it apart, changed the clutches and the bands and also cleaned an oil pump.
But the problem still exists!

Please, help !

[Shadow]

sounds like a torque converter issue.

[Gerald_Austria_EU]

if I shut off the engine and wait a few seconds it moves again...shifts in 2nd ....then slips like if you´d push a clutch pedal.
If I turn the key off - wait - it moves again ...

The intervals have to be longer as more often I try this...

The mechanic said it´d be an elektrical problem, some valve, pump sensor,....

any other sugestions ?

[Shadow]

I assumed that when the mechanic took your tranny apart that he inspected the inside of the case and all parts that came out.

Can your mechanic run a diagnostic on the PCM this may (or may not) give you a hint of what it may be.

I recently got a code for a speed sensor on my 98. It did show up as a code but I noticed as a late **** point between 2nd and third.

The reason I went with first with the torque converter is because I had a similar problem on my 68 camero. The stators in the torque converter got trashed somehow and every time I stopped you would have to put it N or it would die. After a time it started to slip like said yours was. When we tor it apart the mechanical pump had broke the gear.

I hope you figure this out with little trouble. Is it hard to get parts for Jeeps where your at?

I forgot about the valve body. If something has gotten inside or you've got a week spring due to heat or fluid movement it could case this problem. Trans-go and b&m make a valve body rebuild kit. Sluchboxes are fickle creatures. Best of luck!!

[Gerald_Austria_EU]

yetserday he ran a diagnostic on the PCM ...no error !?!?

He will take the tranny apart the 3rd time today...

[Angelous]

tell him to replace the governor pressure solenoid and transducer. Did you bypass the radiator all togeather? If not you need to. install an aftermarket tranny cooler. I bypass every single jeep and dodge truck that come into my repair facility (aamco transmission). Those cooler lines in the radiator clog up and will burn up a dodge transmission in a heartbeat!

[Gerald_Austria_EU]

I got a new radiator, so the cooling line shouldn´t be the problem ..?
But I´ll tell him your other advice!

I thought about an aftermarked cooler instead of the OEM, but I was not shure if this not in addition but instead would´be ok at low speed or in the traffic jam when goin´to the city....

[Angelous]

I would still bypass your radiator all togeather. I see failures way too much to trust them. An auxillary cooler will cool it down about 250% more effectively.