Ford 6.0L Power Stroke Diesel :: Trans Slipping / Hard To Shift - Code PO671
Sep 9, 2016
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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I have been having an issue with my 4-5 gear shift under hard acceleration and know that a rebuild is due soon but I was wondering if any high performance kit available with all the clutches and friction discs needed to rebuild.
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My Father In-law has a 2012 f-350 Dually with 4K miles. He tows a 9K lb camper and until our last trip the truck ram flawlessly. On our return from Myrtle Beach to central NC we were on a freeway traveling at 63 MPH and his tranny would not shift into 6th gear. Tow haul was on. There was some headwind (10MPH) but no large grades or any reason we can think of not to allow an up shift. His display did show a countdown to empty of the exhaust fluid 450 miles to empty.
He took the truck in for service and no codes were found. Dealer did not find any TSB's addressing the tranny issues. Is the sixth gear up shift in tow haul set very conservative? Does it hold 5th unless the load is below a certain value? Other trips we have been on have been mountain towing so 6th gear shift would have been on down hill or level sections. Dealer wants us to bring it to them when it won't up shift next time but dealer is not along a freeway.
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Well I've been towing for almost 150,000 miles with a 2012 6.7 Lariat 4 wheel drive. Things have been going pretty well with the truck. I noticed some sluggish and indecisive type shifts early on but now I'm worried. I depend on this truck for pulling a horse trailer all over the country and Canada. Just recently I've been getting a hard shift or a thump or a clunk when shifting up or down in to second gear. I'm at about 152,000 miles and did a hot flush with LV ATF at about 148,000 miles. Should I worry or keep running?
I have a 97' PSD I'm thinking of giving a nice paint job and a flat bed but am reluctant to do so due to financial concerns and the fact that some folks may not want to see me pull up in an old truck no matter how nice it looks. My tranny temps have been stating under 200F and I really keep an eye on the temps when running up and down the hills while towing. The trailer is a 35' Gooseneck with a max GVRW or 14,000 pounds. Should I wait for the tranny to grenade and then drop in a built tranny and if so who's building these tranny's stronger than stock? Long time no see but this site has always been my go to for all my Ford truck questions, upgrades, etc.
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2011, 69,000 miles. My truck is experiencing very hard shifts from park to drive or park to reverse after a cold soak. It goes away once warmed up. I can't find any excessive driveline play and my transmission fluid level appears fine and in good condition.
The last repair done on my truck was around 7,000 miles ago and it was for a transmission fluid leak around the bell housing. They just replaced the seal between the torque converter and transmission.
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I'm getting a p0087 on a hard acceleration new low pressure pump new fuel filters run the pinpoint test in the pced is fine and passes the high pressure test with the ids? Not sure where to go from here?
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The last couple days the truck has been a hard start in the morning. about 28 deg F. I thought the glow plugs were getting weak or a couple of them were out.
Hooked up my AE and pulled codes, one of them was P0261 # 1 inj. Truck is fully warmed up and is running fine. Did a koer glow plug test and it came back ok. Power balance looks good now.
Probably looked different when I finally got it started this morning. Took 3 cranks to get her going and it sounded like crap till it got a bit warmer.
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Truck has performed flawlessly during that time period. Early build 2003 CC SB 4wd King Ranch truck 94,000 miles I purchased new in 2003. Good batteries. Bone stock except for superchips tune.
First sign of trouble: Two weeks ago CEL came on, P2285 Injector Control Pressure Circuit Low, as soon as truck was started after sitting unused for about a month. Bought new sensor, haven't installed it yet (early model sensor located under turbo on rear of engine and a real pain to change). Truck still started fine and ran fine. Dreading the ICP sensor install, I continued to drive the truck. Drove truck 5 miles to get tractor fuel. Got fuel, started truck and drove away. Got 200ft and truck died. I changed secondary filter under hood, turned key on and let pump cycle about 4 times. Truck started. Cleared codes. No longer have CEL. Drove 5 miles home, shut truck off and no start.
Troubleshooting: Changed primary filter under truck. Really cruddy (probably 80,000 mi on it). I cleaned inside filter housing thoroughly. I had to cycle pump KOEO about 6 times before it started. Shut off and immediately tried to start. No start. Ran pump KOEO about 30 seconds. Started. Shut off and same result. I then drove truck 4 miles driving both normal and WOT. No problems, no smoke, no CEL, ran perfectly normal. Shut off, no start until cycling pump KOEO for about 30 seconds. No codes set.
I then removed cap from secondary filter and checked for trash. Fuel and bowl were clean. I did notice fuel drained completely from bowl in about 5 minutes. I reinstalled filter and put pressure gauge on housing.
Fuel pressure readings: KOEO 55psi after about 3 seconds. Engine running 55psi. Turn key off and pressure instantly drops to 25psi, then bleeds off to zero over about a 3 minute time period. Does this seem normal?
Questions: Could the clogged fuel filters cause the p2285 code to set? Could the HPOP system have developed a leak and cause these symptoms?
Could an injector leak cause these symptoms and engine still run ok?
Action Plan: Install new ICP sensor. Do bubble test to check for injector compression leak. Install Blue Spring mod. Waiting on parts. Possibly buy scanner which will read HPOP output etc. Any recommendations here?
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Earlier this week the truck was hard starting every time. Tested the batteries: 12v engine off, 14v engine running, all good.
The next day it threw a P0284 – Cylinder #8 contribution/balance, and was clearly missing on a cylinder. Despite the lack of a puff of smoke at start-up, I was pretty sure it was an injector. So I ordered one from White Bear Lake, and a fuel pressure test adapter from Strictly Diesel. Then I decided to do some testing with AutoEnginuity. Tried the injector buzz test first and got a note that the truck was not capable of performing the test. Tried starting truck and gauges swept and wouldn’t turn over. Tested batteries again: main battery 11volts, aux 12volts.
I got the batteries in and the stupid thing runs like new. Only codes are P1000 and P0603. Truck passed the injector buzz test, and cylinder contribution test graph is almost a flat line.
Take-aways:
1. Bad batteries can cause all sorts of havoc.
2. Always use a voltmeter that displays tenths of a volt, because if it’s only showing whole volts, it could be rounding up. The 12 volts from my first test was probably more like 11.6 volts.
3. Always do as much testing as possible before buying parts.
4. Costco does not sell Kirkland batteries anymore. They only stock Interstate, and the Interstate warranty has dropped from 36 months free replacement to 30 months.
5. The Walmart and Autozone batteries with the five year free replacement are “out of stock” and I’m guessing they won’t be back with Interstate dropping their replacement dates.
6. Most of the car batteries in the US are made by Johnson Controls.
7. Motorcraft batteries did not get very good reviews.
8. Interstate said that AGM (absorbed glass mat) batteries stand-up better to the additional vibration and heat experienced under the hood of a diesel, but they are significantly more expensive, and not all the brands offer an AGM with a better warranty than their best lead-acid offering. Also, the guy at Sears said AGMs are only beneficial for newer cars that continue performing electronic functions after the ignition is turned off. He said he’s seen lead-acid batteries outlast AGMs, but didn’t specify if those were out of diesels or not.
Questions:
1. Can I expect the P0603 to go away after the drive cycle is complete?
2. What should I do with the new injector? If I return it there’s probably a restocking fee. If I wait for a complete injector failure I don’t get the core charge back until then. With the FICM compensation, I don’t know of any way to identify weak injectors without IDS.
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Ok so when I come to a full stop my truck doesn't want to shift right when I take off where do I need to start looking
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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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2001 7.3 auto, 2wdr, 291,000, Transmission sometimes shifts hard from 1st-2nd, 2nd-3rd. Problem started after I found trans dip stick tube broken and loss of fluid. Anything I can do without going to a shop. I've replaced the Broken Tube.
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Took my first camping with 2012 King Ranch F350 and 37 feet Challenger 12k fifth wheel trailer over the weekend.
I noticed there is lot of transmission slips in first gear. Once it enters 2nd gear, no more slips.
My previous Chev 2008 2500HD diesel didn't slip much with same trailer.
Is this normal for this F350? My rear ratio is 3.55. No slips without hauling.
Maybe I need to ask dealer to check 1st gear towing?
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I just bought a 2002 F250 7.3 4x4 auto. It had a TS 6 position tuner installed. In stock mode, I got about 11 mpg. I wasn't too impressed. I found that when I left it in 75hp mode, my mileage went up to 21. I drive easy and try to keep shifts at or below 2,000 rpm. The problem is that, when in any position other than stock, my transmission shifts HARD.
My question is: what's going on here? Does the TS change the transmission shifts? Or is the extra bump in power enough to stress the tranny? Based on the factory gauge, the transmission is not running hot. The fluid is nice and pink with no odors or metal shavings. I'd hate to prematurely kill my transmission, but nearly doubling my fuel mileage is hard to pass up.
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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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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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Last night I noticed oil on my driveway. I got up under my truck and it was dripping at the trans. I'm not sure that's where it's actually leaking from because the other side of the oil pan had clean oil on the outside of it. What this could be?
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I was spraying undercoating yesterday and noticed a trans leak, it looks like its coming from the top of the trans. Not a lot of fluid just enough to coat the trans on top. I tried using an inspection mirror but i still cant see the leak.
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have a 2006 f250 with the 6.0 Powerstroke diesel started overheating yesterday the ECT and EOTcheck fine with the scangauge always ran with in 8 degree's of each other. Thought maybe water pump impeller may have been slipping so it is new with no change. Fan kicks on like it should. Heater works good so don't think it is a thermostat.
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My 2005 Ford Taurus (3.0 liter engine, auto trans, 117K miles) recently began shifting hard (dropping suddenly, not smoothly) only on the 2-3 shift at 20 MPH. The check engine light is not on, and the car functions perfectly otherwise. A mechanic removed the trans pan, replaced the filter and fluid, and added Lucas additive. The interior of the trans was clean, and did not have a burned smell. The 2-3 shift did not improve.Could it be a valve body or a solenoid? Is it repairable? I drive it gently, and the problem hasn't gotten worse (2 months). What's up with my trans?
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So just got a new pcm installed since i fried the last one anyway. I had a new trans installed almost two weeks ago factory 4r100 now i have a p0720 code. Id take it back to that dealer.
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