Jump to content

Passing control relay. Mb337914


88351wtsi
 Share

Recommended Posts

I just got transmission rebuilt by a shop now no overdrive. It was out before but now it doesn't even try to go in. Voltage to relay but doesn't click or anything when pushing button, however light on dash will turn off/on. Part is discontinued please help. Btw it has been converted to megasquirt while transmission was being rebuilt.
Link to comment
Share on other sites

The passing control relay has nothing to do with the transmission. Check that the wiring harness is hooked up on top of the bell housing next to the rear of the block as well. Remember that the OD operation is controlled by temp. If engine is cold it should not go into OD. The switch on the shifter only allows you to turn off and to engage if the temp requirement is meet. Check in forum and FAQ,s.
Link to comment
Share on other sites

Temp gauge does work. Has a new 1 wire coolant temp sensor is there another one I need to test or replace that controls a/c and od? A/c compressor doesn't work either.
Link to comment
Share on other sites

Temp gauge does work. Has a new 1 wire coolant temp sensor is there another one I need to test or replace that controls a/c and od? A/c compressor doesn't work either.

 

The 1 wire sender is for 83-87 manual cars. You need the 2 wire sender.

Link to comment
Share on other sites

Ok still needing help. Sensors tested good but to make sure I have installed new coolant sensors, new od relay, can hear solenoid click when I press button on shifter, but still don't have od since rebuild. Before rebuild it would go into od and then just slip and not pull now it doesn't even try to go in to od but first 3 gears seem fine? Is it something simple I keep over looking or could there be an issue with the transmission itself?

 

Btw thanks for the link it is very helpful for lots of good info and advice not just on the od issue

Link to comment
Share on other sites

You could have too much slack in the OD band. Passenger side front of the trans there is a cover held on by 3 bolts. Under that cover is a screw and locknut. This is the OD band adjustment. Loosen the locknut then tighten the screw to 5-7 ft lbs. The back the screw out 2 turns and tighten the locknut.
Link to comment
Share on other sites

Yes. Think of the band like a clutch in a manual transmission. The band stops a drum from turning and that engages OD. If the band is too loose it can't stop the drum. It can feel like a slipping clutch or no engagement.
Link to comment
Share on other sites

 Share

×
×
  • Create New...