| From | Message |
Dude
Dodge Dakota
JOIN HERE
6/27/2004
18:01:32
|
 Subject: Tranny Shifting
IP: Logged
Message:
OK, I did spend a little while searching this forum for my problem, but I cannot seem to find it.
My 97 Dak w/ 5.2 (lots of mods), auto, 4x4, has been acting a little strange. While in a light accel, after shifting to 2nd, I get a slight vibration in the drive line. If I accel harder, it increases a little. After hitting 45 or so, it goes away. Yes the U-joints are good/lubed.
Any suggestions?
The other slightly bigger problem is while under a hard WOT accel, it goes into 2nd just fine, but will not shift to 3rd (bounces on the rev limiter) until I let off the gas a little. It is the TV cable? TPS (set at .78 volts)? The fuild was just changed 3 months ago after 25k on it. I only allowed it to happen twice, just to see if it was a freak thing, but it is persistent.
Any suggestions?
Thanks in advance
|
gen1dak
Dodge Dakota
JOIN HERE
6/28/2004
19:01:40
|  RE: Tranny Shifting
IP: Logged
Message:
The vibration might be better isolated if you were to isolate it based on engine rpm vs speed. Is it the same rpm in each gear, or the speeds you mentioned regardless of what gear you're in. My first thought is that you have a tire out of balance. You may have slung a balance weight off, or could have mud on the backside of a wheel.
As for the shifting issue, that could be one of many issues. Hopefully it's not the 2-3 shift valve. The TV cable could need adjustment. Try that first, and pray.
|
Dude
Dodge Dakota
JOIN HERE
6/28/2004
22:23:37
| RE: Tranny Shifting
IP: Logged
Message:
The vibration only comes in once the torque converter locks up. Once it down shifts or speeds past 45mph, the vibration goes away. It's not bad, maybe like being in too high of a gear in a manual tranny type vibration (for example).
I've noticed that the tranny shifting problem happens from around 3/4 throttle to WOT once in 2nd gear trying to go into 3rd. This tranny has about 25k on it, 40% highway, 50% city, and 10% off road (light). I have the Auto X-Ray scanner tool, maybe I can find something tomorrow after I get it back from a friend. I hope that it's not the 2-3 either. I've already had my share of fun with this truck and trannies.
#1- My fault--- water hole a little deeper than I thought, after 3 hours in the water, the bands were shot.
#2- Rebuilder's fault. TC shelled itself on the highway.
#3- Rebuilder's fault once again. Wouldn't shift right.
Now I'm on #4...
Oh here comes the money pit once again...
(and I just paid it off)(go figure)!
|
gen1dak
Dodge Dakota
JOIN HERE
6/29/2004
00:50:59
| RE: Tranny Shifting
IP: Logged
Message:
Hmmm, got yerself a set of problems there. Almost sounds like it could be a small ding (or a slung balance weight)in the driveshaft causing a low-speed vibration. Hard to say without actually laying hands on it. There's a 2-3 shift overlap in the stock valvebody programming. Since it's there, and not also in the 1-2 shift, it kinda points to that. In that it's been through a few reworks, could be a problem developing there. Looks like diagnostics time. Just hard to say. Have the bands been adjusted lately? If you don't have a TransGo kit in there, get one.
'89 Dak with A500:
#1 Their fault. Fried overdrive. Rebuilt
#2 Their fault. Fried overdrive. Rebuilt
#3 Their fault. Fried overdrive. Rebuilt
#4 Their fault. Fried overdrive. Rebuilt
#5 Their fault. Fried overdrive. Rebuilt
#6 Their fault. Fried overdrive. Replaced tranny.
#7 Off warranty. Had to be their fault. Don't know what happened....different from the other times. Parked for several years. Now building a 518 for it. Never did any towing with it, just hauled ass down the highway. Each time, I averaged between 15,000 and 20,000 miles, except the #6. It only managed 78 miles.
|
RadioMan
Dodge Dakota
JOIN HERE
6/29/2004
06:57:29
|  RE: Tranny Shifting
IP: Logged
Message:
Like I've said SEVERAL times, NO ONE and I mean
NO ONE knows how to rebuild a automatic tranny.
Dude, if your tranny has 25k on it after a fix/
rebuild and you're having this vibration problem,
it's more than likely the tranny..... again.
I have given up trying to find anyone that really
knows how to fix/rebuild a tranny. There just
isn't any!
My advice is, get rid of the truck unless you
want to blow more of your hard earned bux on
another so called "factory rebuild" again.
Can you say, STICK SHIFT?
|
gen1dak
Dodge Dakota
JOIN HERE
6/29/2004
13:30:12
| RE: Tranny Shifting
IP: Logged
Message:
You've never met John Vinson of JVX/Memphis Performance. This guy makes A500's that can handle 600HP for the long haul....and you don't need ATF+4 to do it.
|
Dude
Dodge Dakota
JOIN HERE
7/04/2004
18:44:00
| RE: Tranny Shifting
IP: Logged
Message:
Sorry about the wait for the reply, got sent to Idaho for a business trip.
The last time the trans went I was wanting to swap to a 5 spd., but thats a lot of work and money. I don't mind the work, it's the money in the long run. But, maybe 2 yrs from now when all I have to do is replace the clutch and not the entire trans, money seems better spent on the 5 spd.
Gen1Dak
The bands were looked and and stated to be ok when I had the fluid changed a few of months back.
On thing I have never liked about my trans, is od on/off button on the shifter. The button doesn't work and never has. Even the 2 local Dodge dealers can find the problem.
Well, I'm going to exhaust all options prior to a rebuild or swap. I'll try and keep everyone posted...
Hopefully the vibrations is in the trans as well since the 2-3 seems to be going. Last time the vibration started out like this, the transfer case sheered off 3 of the 6 bolts that connect it to the trans. Oh I love Dodge!
|
Wal
Dodge Dakota
JOIN HERE
7/05/2004
16:48:58
| RE: Tranny Shifting
IP: Logged
Message:
try talking to Wayne at APS, he seems very smart and awfully kind with his time online and on the phone. He's making dak trannys that can hold 800hp and a warranty. I have never bought from him, but I did pick his brain until I fixed my "trans problem"; I found the TPS was causing a hiccup I thought was the TC. Cheap fix... DODGE'd a bullet :-)
Wal
|
Dude
Dodge Dakota
JOIN HERE
7/08/2004
06:04:04
| RE: Tranny Shifting
IP: Logged
Message:
That does make a little sense for mine, b/c the a/c will go to default-defrost mode for 2-3 mins while cruising down the highway. I do know that the TPS can cause that problem too. Maybe an even cheaper fix.
I'll try that first.
Thanks!
|
Dude
Dodge Dakota
JOIN HERE
7/10/2004
21:22:11
| RE: Tranny Shifting
IP: Logged
Message:
I set the TPS back to .63v from the .76 that it was at. The first time it shifted it was just fine (2-3 at WOT). But, from there on it wasn't working correctly. So, I'm going to recheck the volts and see if it slipped or just replace the TPS since it seems to be a factor.
As far as the slight vibration, it still happens.
One problem at a time.
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
