hey everyone
so i bought a 1999 f150 automatic and last month it was shifting into gears but hard shifting them.
it ended up fixing itself. a month later its now doing it again. it takes a minute to shift into 2nd gear reeving up to like 3000 rpms.
this morning on my way to taking my son to school it didnt want to come out of 1st gear and then wouldnt go at all. hitting the gas the truck didnt want to move... stopped at the light and tried it again and it moved and then didnt want to move out of first. i tried 1st then into second then drive to see but its doing the same. almost like i lost all drive to the truck. i putted it home and now trying to figure out what to check, some says my trans is shot? could it just be a solenoid? if so how do i check it to see... the truck only has 167,000 miles it shows. prior to this i had to replace the radiator when i first got it 4 months ago.. its the double one for 200.00
it was leaking and the trans fluid was going into the radiator... could that have affected the gears or shifting?
i have no idea what to check to see. plus my bf is out of state working and idk when he will be back. shops attend to screw me over. hoping its not the trans. i hears this is common in these trucks? im use to my wrangler, again this is my first truck. any help would be great! thanks

 

Has the OD OFF light been blinking? If so, you need to get the OBD2 codes read out. If not, you need a transmission rebuild.

 

Have not seen it blinking. I was going to drop the pan and change the filter and fluid and see if that helps. And idk what solenoid it is. But was going to try doing that while the pan was dropped ?
My jeep has an issue before and it was the filter that was being sucked in for some reason and then it was fixed. Idk if it’s similar to the jeep issue. It seems like it but idk if it’s the same concept.

 

If you had a solenoid problem, the OD OFF light would blink and set a code.

 

i did replace the shifting solenoid and the pressure solenoid with no difference. im going to just get a used trans and replace it. im pretty sure i have the 4R70W....
my buddy has a 4R100 that came out of an expedition.... doesnt an expedition has the same trans at a 99 f150? it should match up but when i did some reading it says you need a computer to match up with the 4R100? im going to see if my numbers match up to see where i can pull a trans from.
i have a 1999 ford f150 V8 4.6 titian automatic. but was told this year came with both trans numbers? (depending when it was manufactured) is this true... does anyone know? thanks!
im trying to do this all myself and using youtube and google. i would just like to double check on here before pulling it all.

 

If you have a 4.6 it has a 4R70W. Trans has to come out of the same drive system (2wd or 4wd) and there are electronic issues between different years.

 

As glc said, you MUST stay with what your truck has when it comes to 2wd or 4wd. Otherwise won't fit.

You can use a 4R70W from a 4.6 or 5.4 out of a truck or van from 1998-2003 as a direct swap, linkage and all.

97 and earlier won't work because the internal electronics are different.

04 and newer WILL NOT work because the ring gear is different internally and not compatible with the computer in your truck. These will physically fit, but once it's in place it'll not work at all properly.

Pay close attention to the length of the transmission as they MUST be the same. Yours is the shorter transmission. A longer one might be persuaded into place, but a catastrophic and dangerous failure is in it's future.

If you make sure that the transmission you get checks every one of those marks then you are good.

Electronics issues are easy to correct, but if you get one that has the wrong ring gear or is too long then you should have just rebuilt yours because that would have been easier.

D

 

I included the Expedition as a truck by the way. I just got asked that and should have included it separately as it's own thing. So you can also consider a 98-03 Expedition, but only if it has the 4r70w and not the 4r100 that also came in them.

 

Yes you need a new tranny. Or rebuild. If tranny fluid got into the radiator then it also got water into the tranny. Sorry.

 

Quick question. I just bought a 2003 expedition 2 wheel drive. My speedo is hitting 110 mph when I'm going about 20 mph give or take. I'm assuming I'm hitting the speed limiter due to the truck cutting out after the speedo falsely says 110 or whatever. The guy had another trans put in it with the numbers Rf -3l3p 7006 aa on it. Can anyone please tell me how to fix this issue as the truck can't be driven over 20 mph due to the speedo being severely inaccurate and hitting the limiter causing the truck to stall.

 

That's a 2004 transmission.

https://www.f150online.com/forums/tr...-2004-fx4.html

You need either the right transmission or a custom tune. 2003 has 6 holes in the output shaft ring gear, 2004 has 24 slots.

 

Aww man lol. Thank you. I almost replaced every sensor on this thing until I realized I was actually hitting the rev limiter due to the speedo. Thank you for the input. Which trans years will work for my truck? 5.4L

 

Do you have a 4R70W or 4R100? 4R70 pan is basically rectangular, 4R100 looks like the state of Utah.

If 4R70W, 1999-2003 2wd V8 F150, Expy, or van (maybe some cars), need to determine whether you need a short or long tailshaft. Newer the better.

A custom tune would be a lot cheaper, contact Darrin Burch (offline) as referenced in the thread I linked. Read the whole thread.

 

Thank you! It is from a 2004 truck not sure which model but I will look it up tomorrow. I know there is a big different in gear drives like the original had 6 teeth but this one has 24.