C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Shifting issue... Synchro?

Thread Tools
 
Search this Thread
 
Old Jun 5, 2006 | 08:12 PM
  #1  
servohead's Avatar
servohead
Thread Starter
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 792
Likes: 19
From: ME
Default Shifting issue... Synchro?

I'm noticing that when the transmission is cold on the shift into second, it feels like things are still spinning in the tranny, like the teeth on the synchro are not meshing when I pull it into second. Not grinding yet but something I'm definately noticing out of the normal. From my ASE training I seem to remember that problems shifting with one gear are usually synchro related.... so ..... I wonder how many others have had this problem at a lowly 57k miles....

Maybe it's time to upgrade to a Z06 transmission!

Also, I was thinking of buying some shorty headers..... Are they worth the money (used)?!?
Reply
Old Jun 5, 2006 | 09:20 PM
  #2  
gonbad's Avatar
gonbad
Melting Slicks
25 Year Member
 
Joined: Aug 1999
Posts: 3,452
Likes: 3
From: Spring, TX
Default

Switch out the tranny fluid in your current tranny. It is filled with Dextron automatic transmission fluid. Upgrade it to Redline D4 ATF or another synthetic from Royal Purple or Amsoil. You will be amazed at how mutch better it shifts.

The T-56 has three synchros for 1st and 2nd gear. I have never really liked the way the transmission felt shifting in and out 1st or 2nd.

If it was bad you would hear it grind and it would be difficult to get into gear.

Shorty headers --- Not worth the money.
Reply
Old Jun 5, 2006 | 09:38 PM
  #3  
C5Jim's Avatar
C5Jim
Racer
15 Year Member
 
Joined: Jan 2005
Posts: 457
Likes: 0
From: Mechanicsburg Pa
Default

Also check the fluid level. Either too high or too low a level would give you shift trouble.
I had some trouble shifting into 1st and found the level to be too high. Once I drained it to the proper level, all is good.
Reply
Old Jun 5, 2006 | 09:40 PM
  #4  
servohead's Avatar
servohead
Thread Starter
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 792
Likes: 19
From: ME
Default

hey thanks for the advice!! Ok, so I'll skip those shorty headers.... They just look cool I guess. But as for the synthetic trans fluid.... I know it would probably work better, but haven't some people had seal failure due to using Synthetic instead of regular ATF? I really would love to try it but I'm nervous..... Thanks for your help!!
Reply
Old Jun 5, 2006 | 10:06 PM
  #5  
gonbad's Avatar
gonbad
Melting Slicks
25 Year Member
 
Joined: Aug 1999
Posts: 3,452
Likes: 3
From: Spring, TX
Default

My car has over 120K miles on it. It has had Redline D4 ATF in it since about 35K. No problem at all. Since your down there might as well change the gear oil in the Differential as well. Use the Redline stuff that already has the limited slip friction modifier in it. No problem with my differential either.
Reply
Old Jun 6, 2006 | 11:25 PM
  #6  
C66 Racing's Avatar
C66 Racing
Premium Supporting Vendor
20 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Default

Originally Posted by servohead
hey thanks for the advice!! Ok, so I'll skip those shorty headers.... They just look cool I guess. But as for the synthetic trans fluid.... I know it would probably work better, but haven't some people had seal failure due to using Synthetic instead of regular ATF? I really would love to try it but I'm nervous..... Thanks for your help!!
Been using synthetic tranny fluid in mine for four years now without issue. Changed over at the 800 mile mark. Been using this on the track since 2004: AMSOIL ATF
__________________


C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)





Reply
Old Jun 7, 2006 | 02:43 PM
  #7  
servohead's Avatar
servohead
Thread Starter
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2004
Posts: 792
Likes: 19
From: ME
Default

hmmh, sounds promising! Maybe I should try it...
Reply

Get notified of new replies

To Shifting issue... Synchro?





All times are GMT -4. The time now is 01:22 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE