It is currently Sat Feb 24, 2018 11:19 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: 4t65 issues...
PostPosted: Fri Dec 22, 2017 9:51 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4283
Location: Dearborn, MI
Year and Trim: '93 SSEi
'05 STS-4
'97 Camaro
'97 LeSabre
Working on my 1997 LeSabre again. 1998 4t65HD, 2002 L67, 1998 H-body NA harness with ZZP adapter to make it work with the L67. PCM is from the 1998 H-body, flashed and tuned for the L67.

Trans starts in 3rd gear, if you override it to 1st it feel like it starts in 2nd gear. Not sure what I could have missed during the rebuild, has all new electronics inside, and some upgraded hard parts. I doubt it's from the tune. There is a whining noise coming from something, sounds like it's under the supercharger. Not your typical transmission pump whine though, sounds like some weird lower pitched supercharger whine or something with an odd vacuum leak. Thoughts before I tear it open again? Trans was working before the refresh when I broke the input shaft. Not sure if the noise is related to the trans issue.

_________________
I don't know how much boost it takes to blow the tires off. But I know how much I'm going to use!
Image

Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, racecar! Build thread
'97 Chevy Camaro - 3800, T5, T-tops, my DD
'05 Cadillac STS - V8, AWD, her DD
'89 Buick LeSabre Limited - winter DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 project
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


Top
 Profile  
 
 Post subject: Re: 4t65 issues...
PostPosted: Sat Dec 23, 2017 12:00 am 
Offline
Posts like an LN3
Posts like an LN3
User avatar

Joined: Fri Jun 24, 2016 12:15 am
Posts: 493
Location: Isanti, MN
Year and Trim: 2000 SLE Saved from the scrapyard.
probably something isn't sealing properly. Did you do an air test on it to make sure that the clutches engaged?

_________________
A temporary fix does not exist. It becomes a solution until it needs to be fixed again.
Image
https://photos.google.com/album/AF1QipOYkkevV0gKTHc_8Cstuy8yS1Qyx6SiIKeTzuHy


Top
 Profile  
 
 Post subject: Re: 4t65 issues...
PostPosted: Sat Dec 23, 2017 12:37 am 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4283
Location: Dearborn, MI
Year and Trim: '93 SSEi
'05 STS-4
'97 Camaro
'97 LeSabre
I've heard this a few times now - knowing how the 4t65 works, each up shift is only engaging additional clutch packs. So All of the lower gear clutch packs are working if I have 3rd gear, right?

_________________
I don't know how much boost it takes to blow the tires off. But I know how much I'm going to use!
Image

Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, racecar! Build thread
'97 Chevy Camaro - 3800, T5, T-tops, my DD
'05 Cadillac STS - V8, AWD, her DD
'89 Buick LeSabre Limited - winter DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 project
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 5 hours [ DST ]


Related topics
 Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Another 4T65 Down

Jfridge92

4

214

Sat Dec 23, 2017 9:31 pm

Roadrunner View the latest post

There are no new unread posts for this topic. 4T60 & 4T65

WhiteArrow3800

5

718

Fri Aug 14, 2009 3:52 pm

01bonneSC View the latest post

There are no new unread posts for this topic. 4T65, Dex-VI, and the DIY Shift Kit

LeSabre in Buffalo

3

923

Tue Nov 03, 2009 7:13 pm

2000Silverbullet View the latest post

There are no new unread posts for this topic. What is it with the 4T65 shudder problems?

LeSabre in Buffalo

17

2722

Fri Mar 19, 2010 8:21 pm

LeSabreUltra View the latest post

There are no new unread posts for this topic. 3800/4T65-e are VIN Tagged

2003 SSEi

5

633

Thu Oct 13, 2016 8:53 pm

96 SSEi View the latest post

 


Who is online

Users browsing this forum: No registered users and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group


phpBB SEO