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Post by Custom88 on Mar 11, 2005 11:25:52 GMT -6
I had noticed intermittent rough shifting with my 01' aurora 3.5 with 40,000 miles on it. the cause of the problem I believe is the plug where it goes into the transmission. The wire harness was not snug in the plug. I took it for a drive and the shifts seemed to be seamless. I hope it stays that way.  Just a heads up incase anyone else ever has that same problem. |
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scottydl
Super Moderator 
There's nothin' like an American V-8...
Posts: 7,373
Staff Member
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Post by scottydl on Mar 11, 2005 16:18:06 GMT -6
Hmm, I'll have to check mine if Classics have a similar setup. What RPMs/gears were your rough shifts? I noticed a couple rough downshifts the other day when I was crusing through a parking lot. I think it kept going from 2nd to 1st, and I was definitely feeling it...  |
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Post by Custom88 on Mar 12, 2005 9:47:05 GMT -6
Hmm, I'll have to check mine if Classics have a similar setup. What RPMs/gears were your rough shifts? I noticed a couple rough downshifts the other day when I was crusing through a parking lot. I think it kept going from 2nd to 1st, and I was definitely feeling it... it only shifted rough if the transmission shifted between 2,000 and 3,000 RPM. anything under or over that and it would shift very nicely. |
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Post by stevensolds on Mar 13, 2005 22:50:13 GMT -6
mines been shifting very rough lately. might be due to my high-performance driving. cant wait i hope that pan drop helps and doesnt just screw it more.  |
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mwhc
Aurora Newbie
These are good cars
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Post by mwhc on Jun 24, 2005 9:22:03 GMT -6
My 2001 does the same thing... rough shift. but only when it's hot - only when it's been parked for about 30 minutes. if i start it up again in just a few minutes or wait longer than it's ok. dunno. When it does shift rough i stop for about 2 minutes and it's ok. Now... I've dogged my Aurora out. Drive (D) does not work well anymore... for the last two years I've been using 3rd. Works great! |
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Post by JimW on Jun 24, 2005 11:18:59 GMT -6
Heh...you dont have overdrive anymore eh? 4T65 gave out (common: loss of overdrive) Tranny shops love it, you need a total rebuild if indeed the car doesnt shift into 4th gear.
BTW you drive in 3rd on the hwy? You must get like 9mpg..lol
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mwhc
Aurora Newbie
These are good cars
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Post by mwhc on Jun 24, 2005 14:22:24 GMT -6
it's not bad really... still only 2700rpm at 70. so the guage reads like 28mpg and it seems to be correct based on what i'm feeling it up with. but hey, it's only money.
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mwhc
Aurora Newbie
These are good cars
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Post by mwhc on Jun 24, 2005 14:22:51 GMT -6
filling it up with... i mean  |
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Post by macadamiaman on Jun 25, 2005 0:55:50 GMT -6
I love 3rd on the highway. great passing... no wait, I use 2nd for that (up to 97mph or so) |
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Post by taylal23 on Jul 18, 2005 8:44:56 GMT -6
I have an '01 3.5L. I have been having the same issue with the rough shifting from 2000 to 3000 rpms. It's been doing that since 50,000, now my car has over 140K and I still haven't fixed it. I keep getting codes for the input speed sensor. I had it replaced once but it came back on about a month later. The tranny shop that did it refused to work on the car anymore and told me to take it to the dealer. The rough shifting drives me nuts and only seems to occur when the car is hot like the other person mentioned. Any ideas?
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BNICOV
Aurora Lover
Posts: 782 
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Post by BNICOV on Jul 18, 2005 8:51:52 GMT -6
My '97 SSEi did the same thing for 320 000kms (200 000miles). It would shift rough once in a while and if I stopped and shut it off for a few minutes, it would work normally. It's a gremlin that could get very expensive to fix. Change the tranny fluid every 2-3 years and don't worry too much about it unless the tranny gives up the ghost.
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Post by rel1481 on Jul 21, 2005 14:40:51 GMT -6
Ok this is what my 2001 3.5 does...every now and then...
When i start it up i guess it has a automatic rev that warms the car up, so it revs to about 3000 rpm and then goes jsut below 1000 rpm, then i would put in in drive. But usualluy if i start the car up and go the car will shift real hard in all gears, then i would have to pull over cut the car off and start it back up and let it sit a while.... what in the world is causing this?
Also howcome, when u stomp the pedal the car seems to ******* gears like its raggedy or something? my car has only 68,000 miles on it and i am paying to much money for all thesae problems...
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Post by MBowen574 on Jul 22, 2005 12:05:06 GMT -6
Also howcome, when u stomp the pedal the car seems to poop gears like its raggedy or something? my car has only 68,000 miles on it and i am paying to much money for all thesae problems... Haha... This made me laugh...  Seriously, though, you seem to be having a good bit of trouble, unfortunately. Perhaps yours was built on a Monday, or early on in the model run? |
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Post by stevensolds on Jul 22, 2005 23:46:46 GMT -6
Thats not the 4.0 either so the tranny aint as pumped. I dont think its a 4T65 either, just the 60 i believe. The V6 may make good power and everything, but I would take the 4.0 just for the beefier components. I got 84k and probably drive harder than all of you do and i dont even notice downshifts or upshifts. Start by giving her a good fluid change. If you havent done that by now, what the hell are you waiting for? |
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Post by Custom88 on Jul 23, 2005 17:36:00 GMT -6
the 65 is a 97+ transmission. The aurora has it. the 60E hasn't been used since 1996.
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ahh00
Aurora Groupie
'03 4.0 Pearl White
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Post by ahh00 on Aug 16, 2005 17:39:34 GMT -6
At wide open throttle (WOT) it will usually slam into 2nd gear and shakes the whole car. It has 70,000 miles on it and had the tranney flushed at 65,000 miles. Every once in a while on the interstate, it will do the same thing under normal driving conditions, but not as violent. Usually just a shudder. The strange thing is that it doesn't always do it. Most of the time, yes, but sometimes it shifts smoothly. I don't know if it's the mounts or the tranney. Any suggestions?
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Post by whitediamond on Aug 22, 2005 19:40:58 GMT -6
I had the same problem on my 2001, It is the shift pressure silinoid (sp?) had mine replaced under extended warranty and no problems since. i was told this is a very common problem.
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Post by zephram22 on Aug 24, 2005 0:28:17 GMT -6
I had noticed intermittent rough shifting with my 01' aurora 3.5 with 40,000 miles on it. the cause of the problem I believe is the plug where it goes into the transmission. The wire harness was not snug in the plug. I took it for a drive and the shifts seemed to be seamless. I hope it stays that way. Just a heads up incase anyone else ever has that same problem. What do you mean when you say "where it goes into the transmission?" |
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ahh00
Aurora Groupie
'03 4.0 Pearl White
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Post by ahh00 on Nov 3, 2005 12:12:43 GMT -6
Finally got my baby to the shop...it was the shift pressure silinoid. Thank you whitediamond! |
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Post by stevensolds on Nov 5, 2005 16:47:18 GMT -6
Dan needs to get that replaced. Make warranty do it.
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Post by apostolakisl on Dec 30, 2005 12:39:52 GMT -6
My 01 3.5l has shifting issues as well. It shifts hard from 2nd to 3rd intermittanly. It will do it for a day or two, hot or cold, then go back to normal for a few weeks or even months. When its in the hard shifting mood, it could be in a slightly hard shifting mood or a significant hard shift mood. It is very sporadic. Very rarely (maybe only twice in the past two years) it has tripped the check engine light. It has 70,000 miles now. I need a tranny fluid change and am planning it soon. Do you think new fluid could fix this?
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Post by dk58 on Jan 25, 2006 21:30:16 GMT -6
What was the cost to replace the shift pressure silinoid?
labor & part prices...
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Post by boise on Jan 26, 2006 7:23:48 GMT -6
I was seeing this...and haven't for a long time. It seemed to be doing it on a irregular basis and one morning I drove my wife downtown and it began doing it. I got back on the connector (interstate) got up to around 40 mph, downshift to 3, back to D, down to 3, back to D, down to 2, back to D, down to 2, back to D, down to 1, back to D, down to 1, back to D...going into neutral every once in awhile. Since then it hasn't happened. That was 4 months or so ago. I suspect there could be a piece of dirt or some other contanimant in the system? Time will tell. Can I replace the shift pressure solenoid by myself or is it internal? |
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Post by Wacko on Jan 28, 2006 11:13:31 GMT -6
Can I replace the shift pressure solenoid by myself or is it internal? Yes and yes. Plenty of posts on replacing the shift solenoids on the site. |
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Post by Custom88 on Jan 28, 2006 11:38:50 GMT -6
so did this problem trigger the check engine light, or did the code only come up on a scanner? I might have to get that checked.. the shifts are becomming way too harsh at WOT. It shudders the entire car. the SSEi with the same transmission has crisp shifts all the time, even at WOT.
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Post by stevensolds on Jan 31, 2006 17:50:08 GMT -6
Kill that trans before the warranty is up. I would.
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Post by Aurora40 on Jan 31, 2006 17:54:46 GMT -6
Can I replace the shift pressure solenoid by myself or is it internal? Yes and yes. Plenty of posts on replacing the shift solenoids on the site. That's about shift solenoids, those determine what gear to put the tranny in. The pressure solenoid determines what type of pressure to apply during the shift. It varies on acceleration, weight of the car, all kinds of stuff to ensure a crisp yet not harsh shift. My car also shifts hard sometimes, on the 1-2 shift. It has never gotten worse, and it only does it after driving hard (I suspect it is "learning" and trying to shift harder even when I get on the gas lightly). |
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Post by Wacko on Feb 1, 2006 12:32:49 GMT -6
Thanks for the correction. I noticed my car shifts hard from 1-2 if I'm in traffic and am light on the gas and lift off the throttle at about the same time as the shift. It is not as frequent as when I first got the car. Perhaps it has learned my driving style since then.
So, no answer on whether it can be replaced by a DIYer?
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Post by dk58 on Feb 6, 2006 22:05:11 GMT -6
and cost? ? |
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Just a heads up incase anyone else ever has that same problem. 
