Need help with tranny not shifting after mudding
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Need help with tranny not shifting after mudding - 1/7/2007 7:57:37 PM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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Hey fellas, Im new to the blazer game. Today I went out and got the truck dirty for the first time. I didnt think I was pushing it to hard, but I hit a good rut and bounced around a little. After which I went into a field and got slightly stuck. I worked my way out and realized that my truck doesnt shift on it own anymore. I have to put it L1, then shift it up as I accelerate. Sucks, still drives and works but now I have to shift it manually. Does anyone have any idea what would cause this?? I checked the tranny fluid aswell afterwards and it seems like its a little over full. would that cause to much pressure and cause issues? Thanks for any help you guys can give me. Im also looking for a front drive shaft. The slip yoke is broke on the one I got with the truck, came that way. So I need a new slip yoke for a 77 blazer, with a 350. Its got 16 blue splines, and is roughly 7 1/2" long from middle of u joint to end, and about 2" in diameter. Does anyone know where I can get one? thanks again for any help provided!
*EDIT: swartlkk* - fixed the image tags, but I do not know if *.png files are allowed by our forum software. In the future, you cannot use caps in the tags themselves. So instead of *URL*, use *url* and instead of *IMG* use *img* (replacing the ** with []
< Message edited by swartlkk -- 1/7/2007 8:50:06 PM >
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RE: Need help with tranny not shifting after mudding - 1/7/2007 9:52:50 PM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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thanks for the tips, there isnt any water in the tranny fluid, it just seemed a little above the line when I checked it. It happened right after I hit a big bump, and then I lost momentum going into the field and then I had to start shifting it manually. Its not leaking, and there is no damage to anything underneath the truck. I was only in a muddy field, nothing deep at all. The truck just stop shifting on its own so I lost momentum and got stuck for a bit, until I figured out that I had to put in first until it got up to speed to shift into 2nd, and then into regular drive. Still drives fine, I just have to move it up the gears on the steering column rather than just letting it shift itself while in drive. So something is keeping it from shifting on its own. Anyone else have any ideas? thanks
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RE: Need help with tranny not shifting after mudding - 1/7/2007 10:19:02 PM
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Russyo
Posts: 12
Joined: 1/7/2007
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ill check that, Ive noticed some other loose fittings aswell. thanks, Ill look into that line being loose or cracked. any other suggestions?
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RE: Need help with tranny not shifting after mudding - 1/7/2007 11:23:33 PM
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Russyo
Posts: 12
Joined: 1/7/2007
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well I looked but didnt find that tube to be loose. I did find a "t" fitting that connects that tube to the manifold, and on of the "t" opening was just open, and sucking in air. I plugged it with my finger, but nothing tranny wise changed. When I put it in drive, it feels like it wants to go, but just isnt getting any grip, at least not enough to move, the same all the way down until I get to 1st, then it goes it great. Then when I get going I can shift into second but I have to be in the second gear range, and the same for 3rd once Im going fast enough. So I have to shift it like a manual. Its like the something wont let it shift on its on, it can only go into gear if I place it the right gear manually. Anyone have any other ideas? I appreciate the help!!
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RE: Need help with tranny not shifting after mudding - 1/7/2007 11:53:02 PM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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how do I check it for vacuum, just pull it loose and feel if its sucking. Could you describe where it goes a little better. Is that the tube that runs from the intake manifold all the to the back of the tranny? Cause its still there and seems to be working ok. Describe it a little more and Ill run out and check it. thanks
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RE: Need help with tranny not shifting after mudding - 1/8/2007 12:06:21 AM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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ok I checked that line, i think its the one you described. And no leaks. But I checked the tranny fluid while the truck was running and it was right at the cold line. So does that mean I am low on tranny fluid. And if so what fluid do I use to fill it back up with? thanks.
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RE: Need help with tranny not shifting after mudding - 1/8/2007 1:28:34 AM
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Chevy Lover
General Tech Moderator
Posts: 3411
Joined: 6/11/2006
From: Vancouver. B.C. Canada
Status: offline
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If you have a vacuum tee on the manifold with one open port, then it probably should have a line going from the tee to the modulator valve on the transmission.
What transmission do you have?
_____________________________
Give a man a fish and he will eat for a day, teach a man to fish, and he will sit on a boat drinking beer for a life time
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RE: Need help with tranny not shifting after mudding - 1/8/2007 1:12:42 PM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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I dont have any idea what tranny I have. I was told its a 350, and its an auto. Other than that I just know its a 77 k5 blazer. I just got it two weeks ago, and Ive never had a truck before. Im a car guy, and Ive always had newer cars that I can pretty much let them diagnose them selves. How do I tell what tranny I have, and how do I tell what is supposed to go on that "t" fitting. It looks to have been open the whole time Ive had it, at least it always sounded like it was open and making a suction sound. So I dont think anything fell off of it, the vacuum line that goes to the tranny is still there and doesnt appear to be leaking or cracked. What else could cause this issue. And if the car is running and the tranny fluid level is at the cold line, below the hot line, am I low on fluid or not? Thanks for the help guys.
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RE: Need help with tranny not shifting after mudding - 1/10/2007 11:11:58 AM
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Russyo
Posts: 12
Joined: 1/7/2007
Status: offline
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hey guys, does anyone have pictures of what to look for when I take the tranny pan off the tranny to change the filter and look for cloggs valve bodies or whatever I should be looking for? An explanation and/or pictures to show what Im looking for will give me a little confidence when I pull off the pan and see if anything is stopping up anything. Thanks. And where should I get a new filter and pan gasket, autozone carry that stuff or do I need to go to a truck shop or something. thanks
< Message edited by Russyo -- 1/10/2007 11:12:25 AM >
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