Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

4 to 3 downshift wont go at high RPM

Thread Tools
 
Search this Thread
 
Old 03-07-2005, 12:41 PM
  #1  
TECH Enthusiast
Thread Starter
iTrader: (8)
 
SSpeedracer's Avatar
 
Join Date: Feb 2004
Location: In my garage
Posts: 579
Likes: 0
Received 0 Likes on 0 Posts

Default 4 to 3 downshift wont go at high RPM

Having a lot of problems making the 4 to 3 downshift at high rpms. I heel toe rev match and it still wont go in. Spec 2 clutch, aluminum flywheel, LS6 master and slave.

Getting into reverse is difficult also. Even after aliging synchros in 1st, its hard to slip into R.

Is this indicative of a failure or worn part? Does this have to do with the bent fork issue?
Old 03-08-2005, 10:51 AM
  #2  
TECH Enthusiast
Thread Starter
iTrader: (8)
 
SSpeedracer's Avatar
 
Join Date: Feb 2004
Location: In my garage
Posts: 579
Likes: 0
Received 0 Likes on 0 Posts

Default

Any ideas? Thanks
Old 03-08-2005, 10:55 AM
  #3  
Launching!
iTrader: (4)
 
Gallitin's Avatar
 
Join Date: Mar 2004
Location: Kansas City, MO
Posts: 250
Likes: 0
Received 0 Likes on 0 Posts

Default

On my last camaro I had issues getting it into reverse. You had to pop it just right and then hold it to keep from popping out of gear. Turned out to be a bent fork issue.
Old 03-08-2005, 12:27 PM
  #4  
TECH Senior Member
iTrader: (14)
 
ArcticZ28's Avatar
 
Join Date: Jun 2004
Location: Alexandria, VA
Posts: 5,125
Likes: 0
Received 4 Likes on 4 Posts

Default

Could be a synchro or a fork.... if it's ALWAYS hard to get into the gear then it's most likely a fork... if it is just hard at higher RPM's or randomly, then it is most likely a synchro. Again, nothing is set in stone, these are just general symptoms for each.
Old 03-08-2005, 12:28 PM
  #5  
TECH Enthusiast
Thread Starter
iTrader: (8)
 
SSpeedracer's Avatar
 
Join Date: Feb 2004
Location: In my garage
Posts: 579
Likes: 0
Received 0 Likes on 0 Posts

Default

Gallitin- thanks for info.

When I first got the car used, rear was a bitch and I discovered the backup light switch was broken. I installed a new switch and reverse got a little better but still takes some clutch play to get it in. Ocassional grinding if not perfect.

Looks like its time to rebuild, is there a FAQ on what viper parts to swap?
Old 03-08-2005, 12:31 PM
  #6  
TECH Addict
iTrader: (6)
 
P Mack's Avatar
 
Join Date: Jan 2003
Location: Phoenix
Posts: 2,382
Likes: 0
Received 2 Likes on 2 Posts

Default

Just get the viper 3/4 steel shift fork and a regular rebuild kit.
Old 03-08-2005, 12:36 PM
  #7  
TECH Enthusiast
Thread Starter
iTrader: (8)
 
SSpeedracer's Avatar
 
Join Date: Feb 2004
Location: In my garage
Posts: 579
Likes: 0
Received 0 Likes on 0 Posts

Default

Thanks Artic- might be both fork and syncro. R is always hard and obviously at low RPM. 3rd is "OK" below 3000 RPM, but still takes some time. Above 3K it sucks.

Originally Posted by P Mack
Just get the viper 3/4 steel shift fork and a regular rebuild kit.
What about aftermarket higher strength components? I have been known to abuse the car at open track events. I cant find any sponsors that sell viper/higher strength parts.



Quick Reply: 4 to 3 downshift wont go at high RPM



All times are GMT -5. The time now is 01:38 AM.