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Ford Truck Club Forum > GARAGE TALK > Garage Talk: Engine & Drivetrain



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  #1  
Old March 10th, 2013, 05:18 AM
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Default tranny issue

will a solenoid in the trans make it not shift into drive or overdrive?
  #2  
Old March 10th, 2013, 08:49 AM
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Depends on the transmission you are talking about. What transmission are we dealing with?


89 F-150 5.0l AOD 2x4, 3.55 LS(+4), Converted to HO Roller, 3g Alt, GT40Ps, Y-pipe, Rerouted PCV, Dual Taurus E-fans, Explorer Injectors, Remote ICM, DIY Cold air, Rubber Vacuum System, Tranny cooler, Remote Tranny filter, Saginaw P\S swap, F350 Brakes, more.


  #3  
Old March 10th, 2013, 10:04 PM
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4r70w i have a 2000 f150 4.6
  #4  
Old March 12th, 2013, 09:15 PM
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Quick information I will quote from my transmission builder, outstanding guy if you ask me, he builds the 4r70w/4r75's for a living. I never had 3rd of 4th engage.

Note: This is an excerpt from my conversation with him regarding my truck "neutral shifting" years ago.


Quote:
The way that it isn't making the shift definitely eliminates an electrical issue. If it were an electrical issue it wouldn't neutral out because the shift solenoid wouldn't energize and the transmission would stay in 2nd gear. The fact that it does neutral eliminates electrical. First gear has shift solenoid 1 on, second gear has both shift solenoids off, 3rd gear has shift solenoid 2 on and 4th gear has both ss1 and ss2 on. We know that shift solenoid 1 is working because you have first gear and we know that shift solenoid 2 is working because it neutrals out for a shift to 3rd.






Lets run with this real quick, a shift solenoid is EASY to change, but yes may be messy job. Should cost Approximately $60 to CONFIRM whether or not you are having an issue that is potentially mechanical.

Step 1: Check your WIRING HARNESS particularly where it has heat shielding and is close to the exhaust manifold.

From there we will be dropping the pan and looking, I've read about Shift solenoids failing (because they do!) as well as accumulator pistons and springs failing (under the accumulator pistons), this you may be able to spot immediately as you look up at the transmission.

built and blueprinted Lightning powerplant with p&p heads, race built 4r70w by Darrin @ BC-Automotive
1-Ton swap Dyno 436/475
Transmission saga. avoid www.Engineworldusa.com, junk import motors.





  #5  
Old March 13th, 2013, 10:59 PM
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it will go into drive if you play with the throttle a bit then it works fine until you slow down under 20 to 30 mph
  #6  
Old March 14th, 2013, 01:30 AM
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Now with that im leaning towards accumulator/spring

built and blueprinted Lightning powerplant with p&p heads, race built 4r70w by Darrin @ BC-Automotive
1-Ton swap Dyno 436/475
Transmission saga. avoid www.Engineworldusa.com, junk import motors.





  #7  
Old March 14th, 2013, 07:20 AM
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how hard is that to repair? what kind of parts are involved with that
  #8  
Old March 14th, 2013, 02:03 PM
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shift solenoid has a few screws holding to valve body, o-rings seal. plus electrical


accumulators are held in place with snap rings, push up, should take some effort, remove snap ring and it should come out with your guidance


I recommend you look up transgo shift kits, they should have free instructions that will explain the accumulator process.

don't forget some of the basics involved here, valve body gasket should be replaced if you drop the valve body, the filter should be replaced since you'll have it in your hands.

built and blueprinted Lightning powerplant with p&p heads, race built 4r70w by Darrin @ BC-Automotive
1-Ton swap Dyno 436/475
Transmission saga. avoid www.Engineworldusa.com, junk import motors.





  #9  
Old March 14th, 2013, 11:37 PM
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thanks i will try that


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