Torque Converter seems odd -
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post #1 of 8 Old 07-19-2011, 09:48 AM Thread Starter
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Torque Converter seems odd

I've noticed since buying my used 97 ZJ that when I let off the gas at crushing speeds it seems to disengage the torque converter. It doesn't happen every time but most of the time. Occasionally when going down a hill on the interstate it will also do this. Is this normal?

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post #2 of 8 Old 07-19-2011, 09:53 AM
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just curious but what exactly does it feel like when it disengages?
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post #3 of 8 Old 07-19-2011, 10:13 AM
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Are you checking trans fluid in neutral or park? An older trans that's being run a quart low from being checked in park can act similar.

good luck
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post #4 of 8 Old 07-19-2011, 10:15 AM
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Yes, any time you let off the gas the TC will unlock.

Want to swap an NP242 or NP231 into your ZJ? Here's how:

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post #5 of 8 Old 07-19-2011, 03:41 PM
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^ this, all your feeling is the unlocking of the TC. You only have problems if it doesn't lock once you continue cruising above 45 mph.

93 red ZJ 190k 4.0. Spent more money than I should have ...

Isn't red the only color a vehicle should be?
If at first you don't succeed, use more speed.
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post #6 of 8 Old 07-19-2011, 04:36 PM
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Normal. My 97 does the same. I will also add, use ATF+4 if you ever add any fluid. I used dexron III when I first bought mine just to top it off and it caused the shifts to be harder and I started getting a slight bump into tc lockup. Took off the pan, changed the filter while I was in there, added a drain plug, filled up with ATF+4 and it's back to shifting smooth as silk again.
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post #7 of 8 Old 07-19-2011, 04:50 PM
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1995 ZJ 
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Normal operation of the TC. Now when it starts to do the opposite, and not unlock when you let off the gas(causes the engine to slow you down) thats when there is cause for alarm.

95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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post #8 of 8 Old 07-19-2011, 05:51 PM Thread Starter
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Thanks guys. I had a tech at Aamco telling me that it was about to go. I knew he was scamming me. The tranny feels fine and I was confident until he said that. The tranny fluid has been changed every 40000 since it was new. And I just did it again at 100000.... It truly is babied and well taken care of.

Again, Thank You!!!!
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