Ford 7.3L Power Stroke (1999-2003) :: Trans Slipping On 25hp Tune Up High In RPM Band And Shutters When Up Shifting
Jul 12, 2015
My excursion's trans is slipping on the 25hp tune up high in the RPM band and shutters when up shifting. I have dropped to stock most of the time, but I know i am on borrowed time.
I had a JW trans in my e99, and there is no question on the durability and performance of the transmission. The price has gone up a lot, but that's maybe not the big issue.
I live in the mountains and spend a lot of time pulling and just driving in that 40 to 60 mph range over mountain passes. That is basically where I spend ALL of my time.
The distance between 3rd and 4th is driving me CRAZY! I have researched everything from swapping to a manual, to PCS controllers, to trying 4.11 gears, to overdrive units.
Swapping Manual: ZF6 is the obvious candidate, but I have read the swap is not probably something I have the skills or tools to do. I have also read that the performance of the ZF6 is sub par. But it seems like it would give me my 3.5 gear that I am looking for.
PCS Controller: Looks cool for a way to have control besides using the tree shift. Maybe a compromise on not swapping in a manual.
4.11 Gears: I get pretty excited thinking about the low end torque etc. I go off road almost every week, and like I said, I hardly go over 75 mph. But once in a while I do. Right now, the truck turns about 2300- 2500 rpm at interstate cruising speed. Looking for 4.10s rpm in that range to compare? Also, how bad of a fuel economy hit would I take? What is the cruising rpm of 4.10's between 60 and 65 mph, or in general what is the rpm change?
Overdrive Unit: I have always been interested in more gears, but I read about someone who installed one behind a 7.3 and didn't have they great of results. To the point where he said it wasn't worth it.
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I spoke with a few people here before about my 4r100.. it threw a code a month ago for P0750.. i replaced solenoid and it continued to do it even after clearing codes numerous times.. then all of a sudden it was perfectly fine for over a week, no codes, i ran a few brick hauls with it and ran it for over an hour straight.. i went to fl and upon return i took her for a drive and wouldnt you know, the code has returned.. i did hammer down a little but not from a dig, i just got on it a little playing with a neighbor and his truck and all of a sudden it did its thing slipping and not up shifting then the O/D started flashing again... i cant understand why the code would come back all of a sudden, there has to be a wiring problem correct?
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So I put in new clutch yesterday. Reverse works, granny works, 3,4,5 work. ZF6 manual. But when I try to go 1st or 2nd. Its as if the truck is in neutral....what should I be looking for. I bought the truck having only knowing the clutch was completely shot, was not told about this 1&2 gear issue....
Do I need to pull the trans out again... or is there something I can see or adjust, because from what i can see where the shifter connects there is no adjustments. Is it probably a gear selector fork...or connection that took a crap. when moving in granny gear i did not hear any irregular noises....
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My friend has just brought a truck and has lost 3-4 gear in the auto trans. We have the PO782 code coming up. Is there something in particular we should look at first.
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I notice my trans temp gets really hot fast. For instance just moving my trailer from front of my house to side yard makes temp go to 250. Without any load and driving a couple miles it does the same thing. It's been doing it since I installed the trans temp gauge just trying to figure out what's up.
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2000 powerstroke 4r100 transmission. It has 155k just had it rebuilt and the shop is having a night as am I. It was shifting hard and the o/d off light would start flashing after you drove it a while. Its still doing the same thing and the shop checked the whole wiring harness and replaced the accumulator twice believing they got a bad re-manufactured one. The only code I can pull is a 605 pcm read only memory error. Could the cause be a bad pcm? The shop doesn't seem to have a clue at this point and I'm out 2500. IV taken it back twice now and Iv driven it a total of 35 miles since the rebuild...
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I towed my 32 ft/ 600lb travel trailer 115 miles into arkansas today. When I arrived at the campground, the engine was running rough and shaking the vehicle. I saw highs of 175 (trans temp) 1150 (EGT), 214 (ECT), and 224 (EOT).
I recently installed the canned trans tune from my new SCT X4.
I pulled codes (none), checked cylinder misfire count on scangauge 2 (none). In fact, all gauges on the SG2 were within spec. I popped the hood and let it idle for 15 mins. Temps all dropped down to what I usually see after normal driving (not towing).
The engine did start to calm down as it cooled, but still sounded a rough
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Truck is a 2000 7.3 PSD Exursion, 300k miles, automatic. Does this when cold, I let warm up for 5 minutes before this happened as its been doing it. Going to plug in tonight, was about 40-50 degrees out.
What is causing this shutter? Injectors? After I get off my dirt road to street it runs fine, also notice the ebpv. Seems to do shutter most when reversing.
Does this when cold, I let warm up for 5 minutes before this happened as its been doing it. Going to plug in tonight, was about 40-50 degrees out. What could be causing this? Injectors? After I get off my dirt road to street it runs fine, also notice the turbo waste gate? Seems to do it most when reversing.
[URL] ....
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I bought a ts 6 position from kt performance with PHP canned tunes pretty much and on the 140 tune I get no black smoke under throttle, now I would imagine this is normal with stock injectors because im sure the turbo can keep up somewhat. But the problem is I only make 16 psi max so shouldn't I be dumping black smoke? I know the low boost is because I have a hole in the intercooler pipe next to the power steering pump, but do I have low fuel pressure? I would imagine with only 16psi all the fuel will not be burnt. Hpop can hit 2800 and hold 2500. But ipr hit 80% under full throttle at 3k rpm and had trouble shifting but other than that never sees over 45%. I want to know whats going on with the fuel not boost, just to clear things up. And I don't really feel any power loss im stock. 99 f350 7.3 4x4 long bed cc
And just to be clear I am NOT trying to Roll Coal but a nice smoke trail when flooring it past people who cut you off would be nice
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So I have a 2002 7.3 Excursion and I think it is low on power. ICP is falling on its face when on a 60 or 80 HP tune. I have some boost leaks at the plenums and will work on that but that shouldn't cause my ICP to tank at full throttle. Following are some numbers I pulled with WOT runs up a 6% grade.
16PSI BOOST
EXHAUST PRESSURE 40
ICP 1900
80%IPRDC
this is with the 60 or 80HP tune on my DP-tuner. If I ease into the throttle I get
2700 ICP with
45%IPRDC
but if I stomp on the throttle it stumbles and ICP tanks.
Running the stock tune I can maintain
2700ICP at
40-45%IPRDC
Is this my HPOP being weak, or worn out injectors, to much of a tune or a combo of all three?
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My f350 has 300k on it. 95% of its driving is on trips of 22 miles or more at highway speeds. Occasionally long trips (going to put on 3k miles in 8 days here soon)
Want to drive the truck to 500k miles...but wondering if a tune or a chip would change the mpgs and not hurt reliability? I know its not a Honda Civic...I am not looking for 35mpg....would love to pick up a couple more than I have.
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I have a 1999 Ford F-350. I have six codes from my truck. The codes are P0237 P1119 P1690 P0500 P0603 P0344. My truck runs, but likes to stall out on me for no reasons at times. The other problem I am having is between 1,800-2,500 rpms, she shutters or pops.
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1991, F-250, automatic, 150,000 miles, two tanks. Used mostly for towing an RV plus some pleasure. Not in daily use. A month ago I parked it and a few days later cranked it up and found it wouldn't run over thirty MPH. There was some high pitched backfire in the engine compartment and the trans. wouldn't shift. I parked it and the next day it wouldn't start. When I turned the key on the fuel pumps (either tank) ran continuously. Towed to a garage (I am not a Mechanic). They have replaced the fuel pressure control, checked all pressures and it still won't run right. The problem is intermittent. My tranny man said the trans was good. My mechanics don't know what to do. I bought it in 1998.
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My tranny is slipping all over the place . I recently less than 1500 miles ago changed tranny fulid, tree branch and TP filter, ford filters, and 8 to 9 quarts of mercon SP. My truck is shifting like a bucking bronco. Came up with PO671. So should I replace just the 1 solenoid. Or all the valve body? I plan to run a gauge in cab to see shift pressures for testing purposes to aid in troubleshooting for current issue... reason for fluid change is history unkown.
2004 6.0 f250 4x4 tourque shift OdO is 163,800...
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My tranny is acting odd. I put in drive and seems to slip a lot in 1st, barely even move at some times. If I put it in 1st with the shifter it goes in and grabs then I can shift up to 2nd or drive and there aren't problems. It drives normally when not from dead stop.
Transmission has 50k miles on it since replacement. Fluid level is normal. I don't tow and drive it particularly hard. I will have to go back and look at miles since last fluid change. I should be right around 30k miles since last change.
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I have a 2000 Ford F450 7.3 4x4 dully with a PTO driven winch 108,000 miles. The truck has develop a transmission slip.
I have changed the transmission fluid twice and it drives better but it slips badly. I can drive it up to highway speeds but it has problems getting from 0 to 10 MPH. The transmission runs hotter then normal but nothing major maybe around 205 degrees
Do I need a complete rebuild? This is a beater truck that I use to tow mainly. It is not worth a major investment. I need the PTO gear and 4x4.
I have several 2000 through 2003 7.3 E350 and E450 short school buses. Does the transmission from these has a PTO gear? I am thinking of pulling the transmission from one of them and swapping it.
It looks like the transfer case just bolts to the back of the transmission; I believe that a 2wd van 7.3 transmission will work with the 2000 F450 setup.
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Hauled my last 2 cord of wood for the season, and I now have a pretty good 3-5 slip in and an intermittent bang/clunk when its shifting. So I've put this off for a long while now, and I want to fix it. I've done my research, and I don't really feel like I'm any further ahead than before I did my research.
I'm looking for recommendation's on what transmission and or kit is the best for my truck. I pull my 5er 10-15 times a year mostly up and down the east coast. We are looking to get a new 5er with a bunk house, my goal is to stay in the same weight neighborhood, I run 13-13,500 now depending on where we are going. The goal is to be able to get maybe another 3-5 years of use from the truck, maybe more, and then upgrade to a newer truck. So let me hear what you all recommend as I'm going crazy and probably over researching what I'm gonna do...as usual.
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My son bought a 1999 F250 Diesel about a year ago. The seller gave him receipts showing that the 4R100 had been rebuilt and a new T.C. installed 25k miles before the sale. The problem is that it is slipping. He says it started with 2nd gear, now it will hardly move in 1st.
Fluid smells a little burnt. We pulled the transmission pan expecting to find lots of friction material. It does not have as much as I thought it would, not as much as I have found in the the pans of the few other auto trans I have seen with worn out frictions. Below are pics of the inside of the pan.
Or, is it the T.C. that is slipping. I have never had a vehicle with a bad T.C. How do you diagnose it? I have experience rebuilding (GM) Turbo 400's and 4L60's. Never had a ford AT apart.
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Well, today i had my first bout with tranny issues of any kind either before or after my BTS installation. After sitting all day at work, heading home, the shift i guess from 2-3 at about 40-50 mph shifted really hard, BANG. Heard a whirring/whining sound, lots of slipping with the TC. After a lil ways it was like it was in neutral.
Coasted to stop. Went thru the gears from park, rev, and drive about 3 times, got movement each time. Got out, looked for obvious, no fluids or linkages apparent. Drove thru town about 25-30 mph. Felt like it was "hunting" and shifted like a manual grinding gears. Got on highway and no overdrive and im thinking no high gear either.
Push button on shifter light changes, but no change in operation. Running 60 and rpms are turning 2700ish. Still "hunting". But while hunting it isn't wide rpm swings, just a small amount, not wide enough for a gear shift. I am thinking that its torque converter constantly engaging and disengaging.
While letting out of gas it coasts down with TC still locked up all the way down to about 1100 rpm before unlocking. Then I start seeing the OD light flashing. Ok, classic wire chafe in steering column. But it doesn't always flash, only sometimes. And fuses are good. Temps never got above 150 during this 50 mile drive.
So i get home (and its frigging dark already, i hate that this time of year) and I log on and start reading up on this again to refresh my memory. I had called Brian over at BTS when it happened as i was going down the road, he was busy at time. He called me after i got home and i explained and he talked me thru some things. Wanted me to pull the codes and get back with him tomorrow. I did that and the screen shot is below. I will talk more with Brian tomorrow.
But during some of my reading i think i came across some others that had similar trans codes and the issue ended up being the alternator. Alternator ? For trans issues? Is that right? I guess stranger things have happened. I have a high output alt waiting to be installed but haven't yet. I guess we shall see. Brian thinks it something telling the TC and trans to act that way. Doesn't think anything mechanical, yet, leaning towards electrical.
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Have to get rpm's over 2k before trans will engage, then in between shifts I either have to let off throttle or let engine rev over 2k to get trans to shift...
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I'm getting a sound every now and then of what sounds like i'm running over rumble strips on the side of the highway. I'm guessing it's the trans grinding. Any thoughts?
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