Jumpy at coast??
#1
BrapBrapBrapZoomZoomZooom
Thread Starter
Join Date: Jul 2007
Location: Maryland
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
Jumpy at coast??
I have an '88 NA GXL automatic coupe. So far since i got it i've replaced the neutral safety switch, blown an upper radiator hose, blown a rotor housing, and wired a Fuel cut-off switch.
The rad hosed was replaced, the housings and rotors and gaskets were replaced, the spark plugs and wires were replaced, it's got a K&N intake and an after market cat-back exhaust.
Now, since a couple weeks ago, i've had some hesitation at about coasting speed. It only seems to happen wen it switches into Overdrive, its fine during acceleration and decleration, but when i try to keep it at an even 40 mph or even 60 mph the car bobs and i watch my rpm go up and down until i either give it gas and accelerate or let off the gas.
This happened before i put the exhaust on so i know it wasn't that, and i noticed the trans was overfull by a quart so i took it out so its now at an even level but its still doing it.
If anyone can help me out here i'd greatly appreciate it. I Love this car! but this ***** starting to get old...
The rad hosed was replaced, the housings and rotors and gaskets were replaced, the spark plugs and wires were replaced, it's got a K&N intake and an after market cat-back exhaust.
Now, since a couple weeks ago, i've had some hesitation at about coasting speed. It only seems to happen wen it switches into Overdrive, its fine during acceleration and decleration, but when i try to keep it at an even 40 mph or even 60 mph the car bobs and i watch my rpm go up and down until i either give it gas and accelerate or let off the gas.
This happened before i put the exhaust on so i know it wasn't that, and i noticed the trans was overfull by a quart so i took it out so its now at an even level but its still doing it.
If anyone can help me out here i'd greatly appreciate it. I Love this car! but this ***** starting to get old...
#6
Clean.
iTrader: (1)
Automatics don't have a clutch. It's all hydraulically actiuated with the transmission fluid. There are complex fluid paths machined into the tranny to figure out when to shift. I don't think there's any computer. It sounds like it's shifting back and forth between gears. I dunno, maybe you have a bad front main seal and engine oil is getting into the tranny fluid and screwing up the shifting? I know a manual can get engine oil in the tranny oil like this. Does it happen on an automatic too?
Last edited by ericgrau; 02-29-08 at 07:25 PM.
#7
BrapBrapBrapZoomZoomZooom
Thread Starter
Join Date: Jul 2007
Location: Maryland
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
i'm not sure its the trans fluid cause it only does it when im trying to keep a steady speed, it doesnt effect my acceleration at all. I'm changing all the fluid and filter out tomorrow though cause im not really sure the last time it was done
Trending Topics
#9
Assassin
Join Date: Mar 2007
Location: cedar mills,or
Posts: 140
Likes: 0
Received 0 Likes
on
0 Posts
Automatics don't have a clutch. It's all hydraulically actiuated with the transmission fluid. There are complex fluid paths machined into the tranny to figure out when to shift. I don't think there's any computer. It sounds like it's shifting back and forth between gears. I dunno, maybe you have a bad front main seal and engine oil is getting into the tranny fluid and screwing up the shifting? I know a manual can get engine oil in the tranny oil like this. Does it happen on an automatic too?
#10
Retired Moderator, RIP
iTrader: (142)
Join Date: Sep 2005
Location: Smiths Falls.(near Ottawa!.Mapquest IT!)
Posts: 25,581
Likes: 0
Received 131 Likes
on
114 Posts
is the transmission Shifting Operated from Vacuum?.I'm just Fishing here,as I am not into Automatics..also how did you Check the Transmission Fluid level.It can only be Checked When Warm,to give you an Accurate level.
#13
BrapBrapBrapZoomZoomZooom
Thread Starter
Join Date: Jul 2007
Location: Maryland
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
good news
i changed out all the fluid, replaced the trans filter, and replaced the transmission modulator which helps create VACUUM.
its runs much better now
i changed out all the fluid, replaced the trans filter, and replaced the transmission modulator which helps create VACUUM.
its runs much better now
Thread
Thread Starter
Forum
Replies
Last Post
HalifaxFD
Canadian Forum
126
05-09-16 07:06 PM
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM