modulator=winny trans? - 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 07-25-2007, 12:19 AM   #1
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Feb 2007
Location: Castroville/Sacramento,CA,tampa,florida
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
SSEi93 is on a distinguished road
Default modulator=winny trans?

ive recently installed a modulator on my transmition on my 93 SSEi and all i can say is wow,well not really.somoetimes in the morning,or when the car is cold,when im about to shift gear,the transmittion hits so hard that it sounds like its going to break.now in performance,dont get me wrong,its great,but i keep hearnig this winny noise coming from the trannsmition,its a winny sound like a fords powersteering pump,lol.anywaze,i need help,should the tranny hit hard in cold starts,and should the tranny should be winnyng like a fords powersteering pump with the performance modulator i installed?please help me guys!!!
SSEi93 is offline   Reply With Quote
Old 07-25-2007, 01:10 AM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

As you may have guessed, whining transmissions are not a good thing. Go get it diagnosed. Check your fluid color, smell, and level right after driving, and report it back here. This is the first thing you always check when you have trans problems.

Back off your modulator until you know what'* going on. It did not cause the problem.
willwren is offline   Reply With Quote
Old 07-25-2007, 10:06 AM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Agreed with WilWren.

Whining is not good from transmissions. That could be the beginning of many things about to fail.
BillBoost37 is offline   Reply With Quote
Old 07-29-2007, 07:40 PM   #4
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Feb 2007
Location: Castroville/Sacramento,CA,tampa,florida
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
SSEi93 is on a distinguished road
Default

ok,i checked my color and its a little red,but more greyish!and it smells like a burned cookie and bacon all in one smell.
SSEi93 is offline   Reply With Quote
Old 07-30-2007, 01:54 PM   #5
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default tranny

Time for a fluid and filter change to start. Are you running a cooler?
SSEBONNE4EVA is offline   Reply With Quote
Old 08-05-2007, 04:21 PM   #6
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Feb 2007
Location: Castroville/Sacramento,CA,tampa,florida
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
SSEi93 is on a distinguished road
Default

well im guessing im not cause i havent done anyhting to the transmitton system unless theres a stock one!
SSEi93 is offline   Reply With Quote
Old 08-08-2007, 07:30 PM   #7
Junior Member
 
Join Date: Aug 2006
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
murphyam53 is on a distinguished road
Default

The whinning is your transmission pump working its heart out, your line pressure is way too high. The high pressure is causing the hard shifts. All of this is caused by your vacuum modulator. If it is adjustable, turn the pressure down ( decrease the spring pressure, usually means turn the adjusting screw CCW). Check that the vacuum line from the throttle body is connected and providing vacuum. High vacuum like at idle or part throttle calls for low line pressure, low vacuum like at full throttle or disconnected vacuum line callsfor high line pressure. Your transmission will thank you...
murphyam53 is offline   Reply With Quote
Old 08-09-2007, 01:01 AM   #8
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Feb 2007
Location: Castroville/Sacramento,CA,tampa,florida
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
SSEi93 is on a distinguished road
Default

were is the adjuster screw located and if theres a picture you
can show me,ill really apretiated.
SSEi93 is offline   Reply With Quote
Old 08-09-2007, 11:47 AM   #9
Junior Member
 
Join Date: Aug 2006
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
murphyam53 is on a distinguished road
Default

The aftermarket adjustable modulators that I am familliar with have the adjustment screw inside the vacuum port. remove the vacuum line, insert a small ftat blade screwdriver and feel for the slot. Turning CW adds spring compression and increases the line pressure across the operating range, CCW reduces spring conpression and line pressure. You can set the line pressure by feel, adjusting for that solid shift feel during normal driving. There is a line pressure tap on top of the transmission near the breather port if you want to add a pressure guage to aid in the adjustment process. It is a 1/8 NPT threaded port, pressure should 60 to 90 PSI at idle, maximum pressure will be close to 300 PSI. GM has published a vacuum versus line pressure curve, but I don't think you need to go that far.
murphyam53 is offline   Reply With Quote
Old 08-09-2007, 03:38 PM   #10
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Lethbridge, Alberta, _______Canada._______ West Coast Bonneville Fest ___05,06,07 Survivor___
Posts: 8,134
Thanks: 0
Thanked 0 Times in 0 Posts
SSEimatt93 is on a distinguished road
Default

That whiney noise is your pump! You are working it Way to hard and its being told to put out too much PSI, turn the modulator down, back the screw out CCW.


Edit now that I go back and read..do what SSei93 said or what I said or combine the two
SSEimatt93 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
fm modulator? phoenix_flame220 Audio (and aftermarket electronics) 4 01-08-2005 08:20 PM
vacuum modulator opensourceguy General GM Chat 3 10-24-2004 08:08 PM
Is this the vacoum modulator smoosh 1987-1991 8 10-02-2004 07:21 PM
electronic vacuum modulator opensourceguy Everything Electrical & Electronic 10 10-02-2004 09:00 AM
FM modulator cd changer A20H Audio (and aftermarket electronics) 1 05-04-2004 10:57 PM


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 03:55 AM.


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.