Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 06-03-2014, 03:36 PM   #1
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Porsche related issue but not boxster

Need help. Anyone ever here of or have this problem? Porsche 944 turbo. I let the clutch out while dead stop going straight and have no issue. But if I am turning left or right from a dead stop, I start letting clutch out, turn wheel and the car shutters and shakes...ONLY when turning either left or right and only from a dead stop.

Gear oil was just changed...and that was pretty much all.

Any thoughts?

__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Old 06-03-2014, 03:44 PM   #2
still plays with cars...
 
BoxsterSteve's Avatar
 
Join Date: May 2011
Location: Baden, ON, Canada
Posts: 1,079
Garage
Just a WAG... maybe a bad motor mount or a broken exhaust hanger???
__________________
Six speed 2000 Boxster S
Arctic Silver on Metropol Blue | LN Dual Row IMSR | Arctic Silver console, spoiler frame & bumperettes | Crios mod | Technobrace | RoboTop module & modified convertible top relay for one-touch roof operation
BoxsterSteve is offline   Reply With Quote
Old 06-03-2014, 03:50 PM   #3
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Quote:
Originally Posted by BoxsterSteve View Post
Just a WAG... maybe a bad motor mount or a broken exhaust hanger???
Motor mounts have less than 1000 miles but certainly worth a look...
__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Old 06-03-2014, 06:11 PM   #4
Registered User
 
Join Date: Jun 2013
Location: Socal
Posts: 560
LSD in it ?
Ian c is offline   Reply With Quote
Old 06-04-2014, 02:29 PM   #5
Registered User
 
lkchris's Avatar
 
Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 667
Since the wheel is turned it requires more power to get the vehicle moving. Tire scrub, etc. I think you have no problem. Give it a little more throttle. Similar to starting going uphill.
__________________
Kent Christensen
Albuquerque
2001 Boxster
2007 GL320 CDI, 2010 CL550
3 BMW motorcycles
lkchris is offline   Reply With Quote
Old 06-04-2014, 03:13 PM   #6
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Yes Ian...lsd. Went back to my mechanic this morning and we both drove it. As he told me it is coming from the rear...I thought front but the vibrations etc are coming up through the torque tube to the clutch and motor shaking the front end. We did a gear oil change and he thinks that even though they use Mobil Delvac on all their Pcars with no issue that this LSD is not happy with it and the plates in the lsd are catching. He did not add an additive to it. Going back Monday and we are going to swap the tranny oil with Motul 300 LS and see how that responds. These older cars get fickle in old age and mileage... But I tell you what.. Get out of turning in first gear and have at it...this car MOVES and always a thrill to drive!
__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Old 06-04-2014, 04:30 PM   #7
Registered User
 
Join Date: Jun 2013
Location: Socal
Posts: 560
They're both ls type aren't they ?
Maybe Try an ns type oil ?

There is a lot of info out there about gl4 and gl5 , and using thicker gl4 to overcome gl5 problems .
Very confusing
Ian c is offline   Reply With Quote
Old 06-04-2014, 07:38 PM   #8
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,997
The redline application guide says this car should use their MT-90, which is a GL-4. I think Mobile Delvac is a GL-5. I use the delvac in the diffs for my tacomas (well I sold one so the one that is left ) and in my FJ cruiser. I use the MT90 in the 5 speed in the Tacoma, and also my son's Miata transmission, which hates GL5.

It could very well be the fluid, and there are not many GL4 out there. I think Brad Penn makes one:
http://www.summitracing.com/search/product-line/brad-penn-multipurpose-classic-gl-4-gear-oil

And redline makes a couple of GL4s, the MT90 is the one I use on my vehicles that call for a GL4:
Red Line Synthetic Oil - Gear Oil for Manual Transmissions - MT-90 75W90 GL-4 Gear Oil

Edit: I may be way off, I was putting in 1988 Porsche 944 Turbo into the redline application guide for the above. I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
http://www.redlineoil.com/product.aspx?product=58304

Sounds like that is about the same as the Mobile Delvac 75W90. Good luck, hopefully a fluid change will help.

Steve

Last edited by steved0x; 06-04-2014 at 07:41 PM.
steved0x is offline   Reply With Quote
Old 06-05-2014, 03:25 AM   #9
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Quote:
Originally Posted by steved0x View Post
The redline application guide says this car should use their MT-90, which is a GL-4. I think Mobile Delvac is a GL-5. I use the delvac in the diffs for my tacomas (well I sold one so the one that is left ) and in my FJ cruiser. I use the MT90 in the 5 speed in the Tacoma, and also my son's Miata transmission, which hates GL5.

It could very well be the fluid, and there are not many GL4 out there. I think Brad Penn makes one:
http://www.summitracing.com/search/product-line/brad-penn-multipurpose-classic-gl-4-gear-oil

And redline makes a couple of GL4s, the MT90 is the one I use on my vehicles that call for a GL4:
Red Line Synthetic Oil - Gear Oil for Manual Transmissions - MT-90 75W90 GL-4 Gear Oil

Edit: I may be way off, I was putting in 1988 Porsche 944 Turbo into the redline application guide for the above. I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
Red Line Synthetic Oil - Gear Oil for Manual Transmissions - 75W90 NS GL-5 Gear Oil

Sounds like that is about the same as the Mobile Delvac 75W90. Good luck, hopefully a fluid change will help.

Steve
Thanks Steve. We discussed redline as well. They make one called swepco that a lot of 944 guys use as well. Trial and error, or I rip the whole transmission out and start over, cause you know, I have millions of dollars to spend on a car...why not...lol. Pain in the but. I am missing both my Boxsters right now!
__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Old 06-05-2014, 01:07 PM   #10
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,997
I got a ride in a turbo 944 with an instructor the last time I was at RRR and WOW! It was incredible!
steved0x is offline   Reply With Quote
Old 06-05-2014, 01:36 PM   #11
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Quote:
Originally Posted by steved0x View Post
I got a ride in a turbo 944 with an instructor the last time I was at RRR and WOW! It was incredible!
Yeah, they are.m it's amazing what a 4 cylinder can do. Mine is the 89 turbo with the 88 S options so bigger turbo, 928 s4 brakes, m030 suspension and parts...and of course we added the chip to kick it up a little.

I wish the 986/987 could be upgraded like these.
__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Old 06-06-2014, 12:06 PM   #12
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,616
The only time that I get shuttering on the 944 Turbo is when I don't give it enough throttle (straight or turning or whatever) - then it shakes like crazy. There could be something wrong, but in my car I just give it a little more right foot!
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 06-06-2014, 12:29 PM   #13
jakesbox
 
trimer's Avatar
 
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
Quote:
Originally Posted by thstone View Post
The only time that I get shuttering on the 944 Turbo is when I don't give it enough throttle (straight or turning or whatever) - then it shakes like crazy. There could be something wrong, but in my car I just give it a little more right foot!
Now that sounds like motor mounts or tranny mount. Replaced all of mine...not cheap but that specific shimmy and shake is easy to understand. This is because the gear oil is not right for the lsd. We are replacing on Monday.

__________________
2003 996 Twin Turbo X50, PCCB, polar silver / 2004 996 Carerra Cabriolet, midnight blue, cinnamon leather, IMS Pro / 2003 Artic Silver Boxster - Short Throw Shift, IMS Upgrade, Carerra Light Wheels, De-Snorked with Evoms Cold Air Intake, GHL Exhaust (Sold) / 2002 Seal Grey Boxster - Fabspeed Exhaust, Black powder coated wheels, Porsche stripes (Sold) / 2 -1957 356 A Speedsters (signal red and seal grey) (Sold) / 1989 944 Turbo (m030 S options)
trimer is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page