1997 4T65E-HD wierd acceleration woes - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 09-30-2003, 09:42 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Custom88 is on a distinguished road
Default 1997 4T65E-HD wierd acceleration woes

Ever since I"ve owned my car (I currently have 101,000 miles) the transmission has shifted funny at times. Instead of seemless shifts like our 00 SSEi has with 42,000 miles, mine sort of slams itself into gears. It'* like it has a shift kit or something. The shifts are extremely quick and they give a tiny little jerk when shifting, it'* noticable, but it'* not enough to feel like a bad transmission exactly. It'* most noticable on the 2-3 shift, and also between 35 and 45 MPH while accelerating. When the Torque converter locks up, it feels like the transmission is "tugging" it is a very wierd sensation, I have never felt anyting like it. The RPMs will drop from around 2,000 RPM down to 1,000 RPM almost instantly and before it does this it will have a sort of shuddering while accelerating. (if you push the gas down a little when it'* in the 1,000 RPM range you can hear a growling sound coming from under the hood, it'* not the engine or anything like that. it'* wierd.) Like I said, it'* not bad enough to feel like a bad transmission, it just doesn't feel 'right.' also noticed under hard acceleration I can have seemless shifts like our 00 SSEi, but on low throttle applications is when it shifts rough. does that make any sense at all? You'd think it'd be the opposite, but it'* not. It has the smoothest shifts at around 3,000 RPM shifts, but if it shifts gears at around say, 1,800 RPm during acceleration it will shift hard.

had transmission flush at 98,000 miles, did not make much of a difference..
Custom88 is offline   Reply With Quote
Old 09-30-2003, 11:57 PM   #2
Burgundy_Boat
Guest
 
Posts: n/a
Default Re: 1997 4T65E-HD wierd acceleration woes

Quote:
Originally Posted by Custom88
Ever since I"ve owned my car (I currently have 101,000 miles) the transmission has shifted funny at times. Instead of seemless shifts like our 00 SSEi has with 42,000 miles, mine sort of slams itself into gears. It'* like it has a shift kit or something. The shifts are extremely quick and they give a tiny little jerk when shifting, it'* noticable, but it'* not enough to feel like a bad transmission exactly. It'* most noticable on the 2-3 shift, and also between 35 and 45 MPH while accelerating. When the Torque converter locks up, it feels like the transmission is "tugging" it is a very wierd sensation, I have never felt anyting like it. The RPMs will drop from around 2,000 RPM down to 1,000 RPM almost instantly and before it does this it will have a sort of shuddering while accelerating. (if you push the gas down a little when it'* in the 1,000 RPM range you can hear a growling sound coming from under the hood, it'* not the engine or anything like that. it'* wierd.) Like I said, it'* not bad enough to feel like a bad transmission, it just doesn't feel 'right.' also noticed under hard acceleration I can have seemless shifts like our 00 SSEi, but on low throttle applications is when it shifts rough. does that make any sense at all? You'd think it'd be the opposite, but it'* not. It has the smoothest shifts at around 3,000 RPM shifts, but if it shifts gears at around say, 1,800 RPm during acceleration it will shift hard.

had transmission flush at 98,000 miles, did not make much of a difference..
my mom has had two tranny'* fail right after flushes, and with her bonneville, it had the exact symptoms as yours is having now
  Reply With Quote
Old 10-01-2003, 05:21 PM   #3
Senior Member
Posts like a Northstar
 
Join Date: Dec 2002
Location: Western, Mass
Posts: 587
Thanks: 0
Thanked 0 Times in 0 Posts
Bassplayincrowe is on a distinguished road
Default

When im crusing at like 50 and my TC locks up mine will go down to 1.5 and sorta just sit there. No chugging sound. The engine just runs low and the car is staying consistent. Still quiet, you just hear exhaust change. It wont pop up till you give a fair ammount of gas then its fine. But if if i dont have it in overdrive its fine. Mine sometimes hard shifts in going from gas off to gas on in inner city traffic. But I dont think my tranny is going shes always sorta done it. I've had her for like 5k miles and she pulls hard. I think mine has to do more with computer than anything. I also have a different transmission.
Bassplayincrowe is offline   Reply With Quote
Old 10-01-2003, 05:33 PM   #4
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default

Do you have Normal shift/Perform shift buttons??
TrueWildMan is offline   Reply With Quote
Old 10-01-2003, 05:56 PM   #5
Senior Member
Posts like a Northstar
 
Join Date: Dec 2002
Location: Western, Mass
Posts: 587
Thanks: 0
Thanked 0 Times in 0 Posts
Bassplayincrowe is on a distinguished road
Default

I dont think the RIvera'* had them.
Bassplayincrowe is offline   Reply With Quote
Old 10-01-2003, 08:58 PM   #6
Junior Member
Thread Starter
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Custom88 is on a distinguished road
Default

Quote:
Originally Posted by TrueWildMan
Do you have Normal shift/Perform shift buttons??
nope. :(
nope, no shif buttons. :(
I've also noticed that the 00 SSEi pulls a lot harder than mine at low throttle applications at low speeds even though we have the same gear ratios. once you've moving though say above 35 the riv will outrun the SSEi. but from 0 until around 35 the bonneville pulls smoother and stronger, it takes hardly any gas to get it moving, the riv takes a lot more gas, but I think it might just be the gas pedal on the bonneville has less travel on it so it feels like it takes less gas. I'm thinking the computers might be programmed differently because at the same acceleration level the bonneville shifts at 2,500 RPM and mine shifts at 2,000. (all shifts points are higher on the bonneville than my car. I'm guessing GM updated the chips on the later models to make driveability better. )
Custom88 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1999 4T65E replacing 1997 4T60E ? dseagle General GM Chat 0 04-07-2013 12:44 PM
1997 Buick LeSabre transmission woes... coldfusion11 Buick 4 04-01-2013 11:37 AM
2002 4t65e-HD into 1999 4t65e? buckykattnj Performance, Brainstorming & Tuning 6 02-15-2011 07:36 AM
4T65E-HD to 4T65E swap? woodturner2 General GM Chat 2 11-15-2010 08:53 AM
Acceleration 1997 SSEI rokitrob 1992-1999 6 02-07-2008 12:31 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:26 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.