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post #1 of 17 (permalink) Old 02-22-2010, 05:54 PM Thread Starter
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P0781 1-2 Shift

Hey im new here and have a problem. I have a 95 Thunderbird i just got and it doesnt shift in first or OD. It starts in 2nd and only shifts into 3rd. I pulled the codes and got 1-2 shift. Believe me when i say i been doing my homework on this car. I ordered a MLPS sensor to install and its coming tomorrow. My question is will this fix my problem or is my tranny gone? That would suck if it is cause im 17 and this is my second car from a BMW e30. I love this car but dont want to drop alot in it. Its a 4.6 liter.
Thanks
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post #2 of 17 (permalink) Old 02-22-2010, 06:22 PM
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Originally Posted by Unreal95Bird View Post
Hey im new here and have a problem. I have a 95 Thunderbird i just got and it doesnt shift in first or OD. It starts in 2nd and only shifts into 3rd. I pulled the codes and got 1-2 shift. Believe me when i say i been doing my homework on this car. I ordered a MLPS sensor to install and its coming tomorrow. My question is will this fix my problem or is my tranny gone? That would suck if it is cause im 17 and this is my second car from a BMW e30. I love this car but dont want to drop alot in it. Its a 4.6 liter.
Thanks
You could also have a bad solenoid or serious internal problems.

These trans have issues with the 1-2 accumulator and spring. Eventually I believe there is a loss of shifting from 1st to second from the spring breaking and the accumulator scuffing the bore. I would drop the pan and remove the snap ring holding the accumulator piston. I don't think the 95 needs a clamp to keep the spring from jumping, but push up on the cover before you remove the snap ring to be sure. There are tutorials around for this. Even if the mlps does fix the issue, I strongly suggest replacing those parts.


Its a very cheap fix if that is it.

Beyond a solenoid, MLPS and the accumulator piston, there is probably internal damage.

95 4.6L Rusty Survivor!
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post #3 of 17 (permalink) Old 02-22-2010, 06:43 PM Thread Starter
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Well that sucks thanks for your help though ill check it out. I just bought this car last week.
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post #4 of 17 (permalink) Old 02-22-2010, 11:14 PM
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Thinks selector is in 2nd?

Somebody can correct me if I'm wrong, but if you MLPS was in 2nd instead of Drive (or thinks it is), wouldn't the car behave just as yours is?

That would suggest bad MLPS which you suspected or it just needs adjustment...

Wait, you are getting a code on the EEC, oh well, fleeting thought lol
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post #5 of 17 (permalink) Old 02-23-2010, 12:02 AM Thread Starter
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Yea i ran the codes and got that. I hope its just the MLPS though lol
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post #6 of 17 (permalink) Old 02-23-2010, 11:25 PM Thread Starter
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Well installed the MLPS today...No luck looks like i need to have someone check the solenoids then.
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post #7 of 17 (permalink) Old 02-25-2010, 09:10 PM
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Provided you have MLPS properly aligned going on to swapping out Solenoid Pack now is not that bad at all - After dropping Pan & Filter it's 2 fasteners Torqued to 90 inch lb & one connector - You can bench test them or test in place or just swap in new ones - You'll need 8 Quarts of Mercon V & a proper reusable Pan Gasket - The Solenoids probably the last shot at the possibilty of finding a relatively inexpensive cure here.

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...
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post #8 of 17 (permalink) Old 02-25-2010, 11:20 PM Thread Starter
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Alright thanks for the info ill try it sometime this week.
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post #9 of 17 (permalink) Old 03-09-2010, 09:09 PM Thread Starter
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Is this the right solenoid i need?
http://www.oreillyauto.com/site/c/de...3644&ppt=C0073
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post #10 of 17 (permalink) Old 03-09-2010, 09:14 PM
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That's it dude & damn O'Reilly's has an awesome site ~!

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...
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post #11 of 17 (permalink) Old 03-09-2010, 09:17 PM Thread Starter
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Alright thanks for the quick response!! lol
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post #12 of 17 (permalink) Old 03-12-2010, 12:49 PM Thread Starter
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I chanded the solenoid pack and it shifts in 1st and 4th now but in forth if you accelereate it just revs the engine, the gear disengages. Anyone know whats up?
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post #13 of 17 (permalink) Old 03-12-2010, 02:50 PM
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Well we're making progess - You gotta 3 speed now at least... I'd pull new Code just for giggles - O/D lite binking? - One of the gurus will nail this diagnosis shortly I'm sure.

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...
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post #14 of 17 (permalink) Old 03-12-2010, 02:58 PM Thread Starter
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lol no code yet but i think its kinda unsafe. Ill just keep rolling it till it throws one then
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post #15 of 17 (permalink) Old 03-13-2010, 02:54 PM Thread Starter
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Alright so i dropped the pan again and adjusted the solenoid, changed the filter and gasket. Now I have all gears and it runs great. Also hooked it up with some Mercon V and im so happy its finally fixed! Thanks everyone on this thread for helping me out especially BUCK. Thanks!!
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post #16 of 17 (permalink) Old 03-13-2010, 04:53 PM Thread Starter
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Well third and fourth dont work again so im like about to give up
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post #17 of 17 (permalink) Old 02-17-2013, 05:16 PM
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I'm guessing he either fixed his car or burned it down by now but in case anyone else winds up with the same code this looks helpful ;-) http://www.obd-codes.com/p0781

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