torque converter lockup at 70 -
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Unread 08-16-2009, 04:45 PM   #1
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1993 YJ Wrangler 
Join Date: Apr 2006
Location: Richmond, VA
Posts: 365
torque converter lockup at 70

I just took a trip into the mountains of Bristol VA. During that trip, my 2004 WJ 4.7l did the following
would jump rpms from about 2k to 2.3k when I would hit a bump doing 70
would not increase rpms when I hit the brake while cruising steady.
Would keep steady rpm at 80.

I stopped off at a shop and asked for a transmission flush. the gentlemen said that he didn't do that anymore, trannies would go bad shortly afterwards. He indicated that he thought it was a bad solenoid.

That follows, because if you hit the brakes, the torque convertor should unlock, right?

I'm a fair wrench, and am pretty sure I can drop the pan off and swap the solenoid. As far as I know, the tranny fluid has never been changed, nor the filters.

I reading this for info as well.

Anybody got any advice? I'm thinking I should just drop the pan, replace the filters, replace the solenoid and see what gives.


Many thanks!

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Unread 08-17-2009, 03:31 AM   #2
ratmonkey's Avatar
1997 ZJ 
Join Date: Dec 2006
Location: , Pennsylvania
Posts: 19,793
sounds like the brake switch.
'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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