1991 f250 with 7.3 & 4speed od tranny(automatic)

[crackerjack]

bought a f250 last week with the 7.3 and automatic with od transmission got it home it wouldent go in reverse so i was reading in the fourm aboult cleaning the plug ins on the transmission well i did that and when i was done it had reverse but acted like it was trying to take off in 2nd gear so i done some more reading and recleaned the plugs again and took the positive cables off 15 min. well it worked like a champ for aboult an hour and then it got stuck in 1st gear and wouldent shift but it only for a few minutes then it went back to work like it should i kinda lost with this thing?

[cdnsarguy]

Can you get the codes checked at azone...... Do the speedo and tach work correctly.....

[chuckster57]

Originally Posted by cdnsarguy

Can you get the codes checked at azone...... Do the speedo and tach work correctly.....

I remember reading a post last month or two where the "post"er said that AZ won't do them any more cause of a lawsuit alledging (sp) loss of income. Here is a link to pull codes:
Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical

[JoeVR5]

I used to have an 86 Ford F250 with the 6.9 diesel.

My truck had a vacuum leak from the vacuum line coming from the Injector Pump, and it was nearly impossible to shift. Once I got that figured out, it ran great.

Not sure if the 91 7.3 has a vacuum-controlled shift sequence in the tranny, but that's just my experience with a slightly older truck.

Good luck!

[M.L.S.C.]

Joe, the E4OD is an electronic deal, but uses the same input as the C6 you worked with - the C6 has a VRV on the side of the IP, the E4OD has a FIPL (TPS), one adjusts a vacuum signal and the other electric signal. If there's something wrong with the FIPL trans will act up.

[crackerjack]

i drove it a little today and it works perfect? ill try and scan it tommorrpw and see if it has any codes almost for got the tach and speedo work fine

[JoeVR5]

Ah, thanks for clearing that up.

Sorry I gave some bad advice

I didn't realize that my E4od was not controlled by the vacuum. I've never had to mess with mine yet. I guess you learn something new every day.

Thanks.

[crackerjack]

read the codes today they are 62 & 23

[chuckster57]

Originally Posted by crackerjack

read the codes today they are 62 & 23

You can see the codes here:
Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical

[M.L.S.C.]

Originally Posted by crackerjack

read the codes today they are 62 & 23

62 seems to be a common one, the converter lockup failure, not good. However, FIPL being out of range (code #23) - did you have the pedal to the floor when pulling the codes? You have to, else you end up with wrong diagnostics.

[crackerjack]

I did not have the pedel to the floor when I read the codes,guess i better go try it again.

[crackerjack]

Went out today and hooked the horse trailer to my truck to see how it pull the transmission worked great for about 10 minutes then started to act like it was silpping and then started not shifting. with out load it was working pretty good kinda acts like it dont know what gear it wants to go in?

[M.L.S.C.]

Dude, pull the codes like you should, who knows what's going on in there... The first thing that comes to mind with that last situation is high temperature, for the first several minutes after startup the ATF is still fairly cool, and it generally stays fairly cool when you ain't towing, but hook up the heavy trailer and it starts heating right up. A code 62 if you indeed have it means your converter ain't locking up right, a slipping converter does generate lotsa heat, which may explain your issue somewhat?

[crackerjack]

ok pulled the codes today again with the accelerator to the bottom I only get a 62 code