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1990 f350 diesel 7.3 the tac doesnt work all the time and when it doesnt the transmission wont shift and the over drive light stays on wher can i find a wiring diagram to chase down a possible break i

Trying to fix bad tach connection

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1996 Dodge Ram Transmission shifting problem

I had the same problem with my 96 Ram 1500. I thought I was going to have to pull it out and get it rebuilt or just replace it. That was at 134,000Km it's now got 210,000 and shifting like a dream. What I did to solve the problem was this, as follows:
1. No lucas transmission Fix makes things worse.
2. Get your self a new transmission filter and gasket
3. Grab Gunk transmission medic 12oz
4. Grab 7 Liters of Valvoline ATF+4 transmission fluid (Made for chrysler transmissions)
5. Drop the trans pan and drain all the oil, clean pan and magnet
6. start truck for 5 seconds and the pump will pour out another 1 liter
7. re-install filter, gasket and pan, then add your Valvoline ATF+4
8. Add, the valvoline, transmission medic and make sure you have the right level of fluid

That solved my transmission problems, instantly it was shifting better, I no longer had to let off the gas to make it shift. Now if you have large pieces of metal on the magnet, and it's totally covered in filings, you might want to consider rebuilding the trans. My magnet had usual clutch.         

Anyhow good luck, let me know if it did the trick for you.
Justin

Posted on Aug 30, 2008

fyrebyrd1
  • 121 Answers

SOURCE: 1986 f350 diesel wiring diagram

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528004ba7d

Hope this helps

Posted on Nov 13, 2008

  • 180 Answers

SOURCE: 2004 f350 6.0 diesel- tow haul light flashing

climb under the truck! on the drivers side of the trans in the neutral safty swith unplug it and look for rotted connectors! if so repair damage! second go to passengerside near the rear of the trans ull see a plate that s being held by 2 7 or 8 mm bolts remove plate ! behind the plate there will b another plug do the same! inspect for corrosion

Posted on Mar 19, 2010

csmock132
  • 4669 Answers

SOURCE: 2008 Ford F350 diesel crew power steering locks up

Power steering fluid is full? Sounds like it might be a power steering pump. It has hydroboost brakes that are controlled by the Power steering.

Posted on Jun 26, 2010

  • 3 Answers

SOURCE: i have a 1991 ford

check to see if the computer is getting proper voltage on the yellow wire if that is not it ckeck the large red wiresmy dads truck had this problem last year the yellow wire was defective in the harnes the tack and the transmission work off the computer trust me it is a simple fix run a new wire from the solinoid on the pasenger side to the computer relay on the driverside and replace the relay too

Posted on Nov 10, 2010

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