Question about 1987 Pontiac Firebird
I had the Transgo 700-2-3 reprogramming kit installed in the valve body of my 1987 700r4. It will no longer shift into overdrive (as it did before the install) and I was told that it would be easier to get another transmission, rather than chase down the problem. The transmission has not burn up. Of all the money spent and time invested, I do not want to trash the transmission unless I must.
Overdrive is actually the torque converter going into lock up mode. This is controlled by 12+ volts being supplied through a brake switch (which kicks it out when you hit the brakes) which can easily become knocked out of position or adjustment, then through a connector on the outside left of the transmission which could have been damaged or left disconnected, then through a pressure switch in the transmission which only closes when pressure is detected meaning the trans is in 4th gear, then to a solenoid which when energized provides fluid pressure to the converter clutch valve located in the valve body up until about 1997, and after is located inside the trans front pump. The solenoid in the trans often fails, but I would check all fuses, then the brake switch which you should adjust so that it is depressed until the brake pedal is pushed down.
Posted on Dec 12, 2014
If ur familiar with 700R4. The transmission is still good. What the problem is and they all do it. Remove the front pump and replace the front clutches and it will go into O/D
Posted on Dec 12, 2014
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 13, 2014 | 1995 Chevrolet Camaro
Mar 11, 2011 | 1997 Ford Escort
Dec 17, 2010 | 2004 Chevrolet Venture Passanger
Aug 31, 2009 | Chevrolet C1500 Cars & Trucks
Apr 20, 2009 | 1990 Ford F350
178 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: