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sssvtcobra
09-28-2004, 12:12 AM
Hey everybody,

I had something weird happen to me today in 5th gear. I was wondering if anybody else has had this happen to them. I was merging onto the freeway and was at about 4k-4.5k rpms. When I went to shift into 5th gear, my car all of a sudden decellerated like it bogged down and then slowly started speeding up. It felt like I had no power or torque in 5th. So I down shifted into 4th, and no problem. I had all the power and torque like always. So then I went back into 5th. I then punched it and it did the same thing. The car kind of jolts then real sloooowly starts to speed up. But if I just push down on the pedal slow in 5th it speeds up, still not real fast but there is no jolt. It doesn't slow down before speeding up either when I push down on the pedal slow. But it does jolt, then slow down a little, then starts speeding up slowly when I punch on the gas. I just had underdrive pullies put on about 3 hours before this. But other than that, that's all I've done to my car real recently.

Does anybody have any ideas or experiences??
Please help!!

Thanks
Jeff

ausie
09-28-2004, 07:26 AM
I can do that in just about any gear except 1rst and 2nd (depending on vehicle speed) Since 5th gear is an overdrive having less than 1:1 gear ratio, what you experience is normal. I usually avoid tying to accelerate in 5th gear at low speeds (in fact a barely use it since it is only good for the highway) Most of the time with speeds under 60 when in 5th gear (especially at lower speeds) the engine is typically operating at idle. The same can be said with 4th gear at 40 mph or lower. The RPM is maintained by the IAC at that point and the transimission is effectively coasting but not in the same reguards as is the case with automatic transimissions. You probably will not notice it at 80mph as much as at speeds below 60. If the final drive was different than 3.27, lets say 4.10 it would be much different.

Lumpydogs
09-28-2004, 10:10 AM
Hey Jeff,

Did you have your Traction Control turned off. From your description
it sounds like the TC was kicking in. This will very significantly retard
acceleration if the computer has sensed loss of traction.

sssvtcobra
09-28-2004, 12:54 PM
Lumpy dogs,

I wish I could remember if I did or not. Everytime I get in my car, I ry to remember to shut it off. I have had that happen to me once before, and thats not what this felt like. I tried to look down to see if the wheel spinning light was on in the cluster but I was merging right into traffic at the time so I was watching for cars instead. But I went and drove it some more last night. And when I punch it in 5th it still does kind of jolt or hesitate before speeding up. But if I just slowly press down on the pedal it speeds up fine, it does speed up faster the faster I start out. So I am wondering if it's what Ausie had said. Since 5th is an overdrive it just can't get up and go. I think I wil drive it again today to see if it does it again, up in the higher rpm and mph ranges. I wonder if when I shifted into 5th, if I had gas pedal out just right or let off of the clutch weird with the combination where the gas padal was or what. But it takes off just fine in 1st-4th. I just hope I didn't mess anything up. I will see how it goes today.

One last question, would that hestition have anything to do with the transmission? I had my exhaust looked at. And they told me that my transmission was ticking or rattling. So know I need to have that looked at to.

Thanks guys for the replies. I'll let you know what happens today.
Jeff

TA_Spanker
09-28-2004, 02:10 PM
I totally agreee with what Lumpy said. That sounds exactly like the traction control kicking in. Sometimes when my revs are high, and I go to shift up into the next gear, the gearbox locks me out (maybe I didn't push the clutch in enough to stop the gears from spinning) and then when I release the clutch, thinking I'm in gear, it just slams my tach with high revs. By this point I'm usually upset that I just missed my high gear, and just slam it down into the gear again. Well, since my revs are high, and the fact that I have 4.10 gears, my car breaks traction.....I always drive with TC on unless I'm purposely wanting to slide....Once the TC kicks in, it takes over the car by minutely braking and controlling the fuel for about 1-3 seconds. This is probably what happened to you. You said you were 4-4.5k revs. Well, if there was gravel, oil, or water on the road, you might have slipped and the TC might have kicked on. Next time it does it, look for the Green-Spinning-Wheel that appears on the dash. Everytime I see that I get mad that it happens, but am happy that I have a powerful "smart" car and not just a powerful one. ;)

Lumpydogs
09-28-2004, 06:24 PM
Jeff,

If you are worried about your ticking tranny check out the Tranny Fluid
Change thread. I can't believe the difference just changing my tranny
fluid to Mobil 1 synthetic ATF. Changing your fluid is fast and easy if you
have a way a pumping new fluid into the tranny filler hole. You can do it as fast as changing your oil. You may want to change fluid before digging into your pockets to pay a transmission shop. You'll need 4 quarts of fluid at $4 - $5 a quart.

p.s. The drain plug is at the rear of the tranny facing straight down The filler plug is directly over the drain plug but hidden over the tranny brace on the passenger side. The drain and filler plugs are identical 3/8" square drive plugs :D

sssvtcobra
09-28-2004, 07:33 PM
Lumpydogs,

I think I will change my trannsimission fluid and see if that helps. How did you get the fluid into the tranny if the fill plug is on top of the tranny? I'm guessing there is not enough room to pour it in there, even with a funnel. Also I think it may have just been done. I took it to the dealer for the 30K mile service, just a few months ago. I took it there since I get employee cost and one of my old school buddies works in the service department. So I always get him to do it. But I can't remember if that was part of it or not. But it definatly wouldn't hurt to do it again.

Also I drove my car again today to see if it did the hesitation and then start to speed up. I tried it at all different rpm's and mph's and the higher up I am, the less it does the hesitation and then speed up. It has a tendancy to take off a little better the higher I am.

Thanks
Jeff

ausie
09-29-2004, 07:01 AM
I guess speed would be the issue. 5th gear is a mushy gear. Acceleration is rather slow even WOT. The only time I ever felt that 5th had a similar response like the other gears was in speeds in excess of 100mph. I only use 5th to conserve on fuel. If you mash doen the throttle quicly in 5th you may hear some clunking noises (I assumed that it the gears taking up slack in the mesh, especially when using it at low speeds below 50). The tremec tans is different than the borg warner tans I was used to in my old 87 escort where 5th was not as low in gear ratio. I first thought was a problem but turns out it is typical. I recall shifting into 4th at 35 and heard a clunk and the motor was bogged down. It was worse in 5th. I could even repeat it in 3rd gear at lower speeds.

As for ticking sound, if you hear that while in gear you may have a problem. I can hear something in the clutch assembly rattle when out of gear, or if I push the stick to one side in neutral. I may indeed change the trasmission fluid this winter since I now have 31k miles on it. I should probably do the rear as well but that looks more complicated.

Lumpydogs
09-29-2004, 11:12 AM
Jeff,

I got the tranny fluid in by using a squeeze bottle and a few inches of
plastic tubing. It was slow, but it worked.

p.s. the filler hole isn't on top of the tranny, it is on the passenger side
hidden over the tranny brace. You can easily get to it from underneath
the vehicle. Getting fluid to it is another story :D

sssvtcobra
09-30-2004, 05:02 PM
Thanks, Lumpydogs.

I happened to be under my car today looking at my exhaust and took a look to see where the filler hole was. I can definately see how it would be a slow process.

Jeff