Where is lockup torque coverter solenoid?

mas · Jun 26, 2011

Hi. Nice forum. Any one have experience on this: recently tuned up my 91 Ram D250 5.9L gas 2WD automatic (A518 trans) after experiencing some misfires under acceleration. Happened to get a code 37 from the computer which the Chiltons manual says is "part throttle unlock" (or lockup torque converter circuit) problem. There's supposed to be a solenoid for that, somewhere, but I can't find it on the transmission crawling underneath. Manual doesn't say where it is. I've read on-line that fault code 37 should be ignored ... any tips?

Bigtman07 · Jun 27, 2011

Welcome!! If I'm thinking right it is inside the trans. If you pull the pan off it should be in there. I personally don't like to mess with the trans I take mine to a shop for all that work. I'll try to do some digging for ya and see what I can find.

Edit:
From what I have been reading It could be a dirty connection all the way to a bad tq converter. But your guess is as good as mine. Hope you get it figured out.

mas · Jun 27, 2011

Thanks for the reply. Found some diagrams online showing a 3 prong round connector to the lower valve body area on the A518 transmission. It says that solenoid may be on 92 and newer only, however. And it's not there on my 91, so it's a code probably to ignore. Time will tell.

BillyWayne · Jan 24, 2012

There are wires ( 3 I think ) that go on to the trans right at your shift linkage. If there are no wires there, you don't have a lockup torque converter Hope this helps.

Where is lockup torque coverter solenoid?

mas

Junior Member

Bigtman07

Registered User

mas

Junior Member

BillyWayne

Junior Member

Latest posts

Members online

Forum statistics

Share this page