hi guys, was looking for some help i have a 2001 supercrew that has lost reverse and 2nd will neutral out after 2500rpm have the trans removed and looking for some help if anyone has seen this before. i understand that reverse is totaly mechanical? so what would cuase both reverse and 2nd to go?

 

Would it still neutral out with OD off? Did you try manual 1st and 2nd gear and see if they engaged?

The reason I ask is because there are two bands in the 4R70W. The reverse band is used in both reverse and manual 1st gear, but not 1st gear in drive. And the Overdrive band is used in manual 2nd gear, and for OD in drive.

So if those two work then its not a band.

Next question would be was it shifting really late from 1st to 2nd? Because you might have the same failure I had and maybe 2nd isn't second at all... I thought I still had 1, 2, and 3rd. In reality the tranny was shifting directly from 1st to 3rd, which is why the shift was so late.

So it would shift 1 then hold it extremely long and then jump into 3rd and i could cruise. This was only with OD off though. If I left OD on it would try to go into OD and neutral out. I also lost reverse at the same time, so if what I just said sounds familiar then at least I already know whats wrong lol.

You really shouldn't have taken out the tranny before asking questions for help because there's no way to test theories now lol.

- Erik

 

sounds like maybe a broken reverse sun gear shell to me dont really know how to describe it look at the plantary at the big piece that goes in to it will have a weld broken and will turn not supposed to

 

Yep, that's exactly what I was thinking. The same happened to me and that's why I'm currently rebuilding my tranny lol. That's why I described the symptoms to him. Great guess jhunt47

- Erik

 

ya guys it was the sun gear shell i found it the day i posted the thread sorry. i found that the shell was spinning on the sun gear and from my past tranny experience i knew that wasnt right. so i am in the process of replacing it and putting the trans back together

 

Yeah, I had this happen to me about a month ago. I'm still rebuilding the tranny slowly. Interesting to see this happen to someone else, it must be a more common failure point than I thought.

- Erik

 

I have a couple of shells sitting around that spin free of the gear like that. It isn't uncommon.

Darrin

 

Well chalk up another one. Last Friday left work, shifted in reverse mine popped and was sluggish backing up. Shifted to drive and was slow taking off. Next morning same thing happened when I left home. Drove about 2 miles and had no reverse or OD. In the tranny shop now my mechanic says broke planatary gear and it's not even been on the lift yet! 2001 F150 Screw KR 4 x 4

 

Scruffy,
you've described my problem exactly. 1999 expedition. In somewhat of a hurry, I popped the truck into reverse and it ****** a bit, then no reverse. Going forward, goes out of gear when OD should kick in. With OD selected off, I get a delay in going from 1 to 2, but sounds like it's really skipping 2nd and going to 3rd, explaining the delay. Otherwise, I can cruise with OD off. So sounds like the reverse sun gear. Overall, how hard is it to remove the transmission and replace the sun gear. I'm not a professional, but have removed and replaced/repaired transmissions before. Does it require any special tools like bearing presses or special gear pullers. I don't have any familiarity with this transmission.

 

If you plan on keeping the vehicle for a while, the best thing to do is buy a Ford crate reman tranny, it has a 3 year/100k mile warranty. The cost is competitive with a professional rebuild.

 

same issue friday.. tried to shift in reverse.
big bang,, no reverse,, 1 gear only... and it took while to shift..

which could mean it was going to 3e... then it dropped the drive..

had it towed..

everybody online says it is the sungear.. my local mechanic..no answer yet..
(it is the weekend)..

nice christmas present.. haha..

Rolf

 

I have recently had this exact same problem. It is a 200 F 150 extended cab and full sized truck bed. I am not certain if the tranny is a 4R70W, but appears to be. I drove the truck home in manual first gear. Reverse, Drive or 2nd manual didn't work. The whole time OD was on. So I came home and researched it. I read this about turning OD off and tested it. That fixed things. The reverse still doesn't work and it shifts from 1st gear to the next gear at about 3000 RPM though. So, my questions:

- Will it hurt the truck to drive it like this with overdrive OFF and having no reverse? I just want to have some time to research this before I send it to get fixed so I don't get cheated.

- Does this mean it is that Sun Gear thing needs to be replaced you all mention in the 2nd or third post?

- If it is the sun gear, how much should it cost to have the transmission fixed? Right now my quote is to rebuild/replace the transmission and it is about $1,700.

I have never worked with transmissions before, but have a common sense of car engines and how they work. Most importantly, please let me know if its safe to drive the car few a few days till I make a decision. I don't want to damage the transmission any more if it will help keep the repair cost down. THANKS!

 

First, that quote is really high..
get another couple of quotes..
see if you can find a shop that specializes in transmissions.

I found a local guy, that quoted me $1000 to rebuild it..(and pull it and put back in)
then when I picked it up, he said he overcharged me and the bill was $825.
the reason was because it is a 2wd and he quoted a 4wd.

for some reason all the other shops quoted $1400 - higher..
these shops would actually take it to the guy I took it to. and make about $600 profit on the deal.

My guy said I could drive the truck as long as you keep the RPM down.
Mine would go in second gear if I took the overdrive off and could cruise at 45 mph, I drove about 40 miles to his shop on backroads.

it is most like the sungear, any (good) mechanic should be able to tell you that after describing the symptons.

talk to your friends,parents, ask if anybody has had any transmission work done. most likely yes,, they should be able to point you to good mechanic.

good luck

 

thanks rolfvanj. well, I got it fixed for $1434. Alot less than the first quote of $2000. But then I got it back and the 6th cylinder wasn't friing, so I ended up getting all the spark plugs replaced at the ford dealership for $200, cause they were a hassle to get to and I didnt want to break one off or strip the engine. SO that fixed it for about 2 minutes and then its misfired again, so I went back and got the coil replaced for $100. it ended up being $300 more... oh well. Is it ok to buy the pack of 8 coils off ebay and replace all the others with those? i feel like my car is occasionally missing a few cyclinders still. I heard the cheap ebay coils are the same as fords. all the other coils have 130k miles on them so it may be close to time...

 

tmarshall, what I ussually do is when the engine misfires and kicks out a code, I go to autozone have them read out the code (free) and it usually tells me which cilinder is misfiring then I buy one from them around($35-$40). I put a date sticker on it and then replace it...(5 min), need 7 mm wrench. I am not replacing all of them since not all of them need replacing i've got 120k on mine and replaced about 4 of them.(not cilinder 4 and 8 yet ..
mine starting idling rough, recently and it the code came up that the EGR valve needed to be replaced. usually this is the dpfe sensor going bad.
I might try cleaning the trottle body today, since I heard it gets carbon build up.
(seems to be common issue, we'll find out maybe later today..)

autozone will give you a warranty on the coilpacks, that is why I get them there.