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#1
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HELP ME PLEASE!!! Is my tranny broken???
Two days ago while driving through the city my transmission started missing gears. It would rev up to about 3-4k then shift really hard, even at slow cruising speeds (e.g. 25mpg @ 3k). I stopped and checked the fluid level since I had this problem previously when a belt snapped and snagged a big hole in my transmission cooler lines. So I got some more transmisison fluid (ATF-4) and topped it off. The next day it acted up one time on my way to work but today on my way home it was doing it even worse than the first day. I stopped and checked the fluid, it was full. I'm at a loss guys, is my tranny going out?
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#2
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I'm assumong you fixed the "big hole" ( whatever that means) in the cooler lines.
Sounds like a vacuum issue to me. You may have disconnected a vacuum line when tinkering with it.
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
#3
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two possibilities.
bad kickdown switch holding the transmission in lowest gear to the shift mark points on your speedometer (could be as simple as floormat stuck under accelerator pedal.) and bowden cable popped out/broken. |
#4
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Lets get a baseline:
When was the last transmission service (oil and filter)? When was the last time you changed both fuel filters? How confident are you that you do not have some sort of vacuum leak? In case you are not familiar with the "Bowden cable", it is the cable that determines at what point, higher or lower rpms, the transmission will shift.
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1987 300TDT - 195,000 (Original #14 head) 1993 190E 2.3 - 105,000 1981 300D - 250,000 |
#5
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The transmission fluid and filter were changed about 20,000 miles ago.
I'm not confident that I don't have a vacuum leak. I know NOTHING about transmissions. What about this "kickdown switch"? I was looking up similar problems and found some guys had replaced their B2 Piston... could that be it? I guess I'm gonna need some help diagnosing this. What do I look for?
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#6
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Also, both fuel filters were replaced between 10-15K ago. The inline filter gets changed ever 3 times I change my oil. I've replaced the canister filter twice in the 50K I've put on the car.
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#7
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not B2. totally different symptoms.
kickdown switch is under your accelerator pedal. round black switch. if it's broken, or depressed, your car will require high rpm's before shifting to the next gear. if that's not a problem, the cable that goes from your throttle linkage on the valve cover to the transmission could be broken. it should have a black rubber boot on it kinda accordion like. about 1/2" diameter. |
#8
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No I'm not familiar with the "Bowden Cable"... what do I look for?
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#9
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Quote:
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#10
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Lol, yeah. Sorry, its early.
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#11
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[QUOTE=RichardLSU;2481660]Two days ago while driving through the city my transmission started missing gears. It would rev up to about 3-4k then shift really hard, even at slow cruising speeds (e.g. 25mpg @ 3k)......... QUOTE]
I see 2 symptoms here... missing gears and hard shifting... What does missing gears mean? Hard shifting. From 1st to 2nd?
__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
#12
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Well the hard shifting comes from the engine revving so high and then finally shifting into gear. Yes, it feels like its missing gears... or a better way to describe it is like the turbo not kicking in (that lump of torque is gone and the engine just revs). Although I know thats not the case. Like I said, its sort of the same symptoms I had when the transmission cooler line got slashed and it dumped tranny fluid out of it, though now its still holding fluid.
I checked the kickdown switch under the pedal and it seems to be ok, that is its not stuck on. I've never had an issue with it before and its always worked. I hardly ever use it. Second, I checked the Bowden cable. I moved the rubber-accordion-boot back and pulled on the cable and it is flexible but not broken. The engine does rattle around and shake so could that bolt that its hooked to maybe worked its way out a little bit? Should I tighten it or loosen it to cure my symptoms? Any other ideas?
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#13
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Also, on the highway on my way home instead of cruising at 3K at 70mph it was closer to 4k, and then for no apparent reason shifted and then settled down. But then went right back up after I started cruising down a hill and let off the accelerator pedal. I gave it a good jolt on the pedal and then it shifted up again, but once I got into town it was at almost 3k through my 25mph neighborhood, like it wouldn't shift into second.
There doesn't seem to be any rhyme or reason to it. Sometimes it works fine and sometimes it doesn't.
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
#14
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Sounds like your tranny is flaring (skipping gears). You still didn't say from what gear to what gear......
Most of these symptoms indicate a vacuum leak. You may also have vacuum-driven parts that are not necessary such as egr, etc but still are connected. In my 84D, I found that removing and sealing the vac lines to unnecessary accessories corrected the flaring and shifting issue.
__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
#15
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Sometimes its 1st to 2nd and sometimes its from 2nd to 3rd. I don't feel it downshift now. There used to be a big CLUNK when it would, but now nothing.
I guess that clunk is a familiar trait of these transmissions, probably the result of a vacuum leak from what I understand. There is a labyrinth of vacuum lines underneath my hood... where do I begin? Thanks guys for all your help. My car wouldn't still be running if it wasn't for this forum!
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1963 Ford F100 - Cummins Swap? 1985 Mercedes 300SD - 210K 1992 Ford Festiva - 92K 2001 Ninja 250 - 8K |
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