Cold shifting problem...
12-08-2008, 05:01 PM
#1
Cold shifting problem... ...So about 4 weeks ago I headed to the track and on my first pass I missed 3rd gear, followed by missing 2nd the next pass. On my final 2 passes I did some slower shifting and I didn't have a problem but my et suffered because of the shifts. At first I thought it was the clutch hydraulics, and after getting under the car and looking at where the feed line is, I know for a fact the clutch fluid was not boiling. After trying to do some quick shifting around town and not being able to hit gears I decided to take the penzoil synthetic atf out of the trans and put regular atf along with 1 quart of penzoil synchromech. The shift has gotten better, but on cold shifts and I can still feel some hesitation when going into 2nd gear quickly. I plan on going to the track on 12/14 and want to make sure my trans problems are behind me. I'm thinking about throwing another quart of synchromesh in the trans since it says it helps with cold shifts, anyone think that's a good idea? Btw, the car is a 99 Z28, stock hydraulics, 40K on the clutch.
12-08-2008, 05:43 PM
#2
...So about 4 weeks ago I headed to the track and on my first pass I missed 3rd gear, followed by missing 2nd the next pass. On my final 2 passes I did some slower shifting and I didn't have a problem but my et suffered because of the shifts. At first I thought it was the clutch hydraulics, and after getting under the car and looking at where the feed line is, I know for a fact the clutch fluid was not boiling. After trying to do some quick shifting around town and not being able to hit gears I decided to take the penzoil synthetic atf out of the trans and put regular atf along with 1 quart of penzoil synchromech. The shift has gotten better, but on cold shifts and I can still feel some hesitation when going into 2nd gear quickly. I plan on going to the track on 12/14 and want to make sure my trans problems are behind me. I'm thinking about throwing another quart of synchromesh in the trans since it says it helps with cold shifts, anyone think that's a good idea? Btw, the car is a 99 Z28, stock hydraulics, 40K on the clutch.
12-08-2008, 06:02 PM
#3
Yea, I still think it may be the clutch hydraulics, but I went to the track back in the summer heat and never had a problem. I also did the thing where you push the clutch in and rev it to like 5K and the car did not move so I know the clutch disengages fully most of the time. I plan on doing the 02 slave and tick master cylinder after I get some money. I tried bleeding the clutch, but was worried about dropping tools in the bell housing so I stopped and just changed the fluid in the reservoir.
12-08-2008, 08:12 PM
#4
Yea, I still think it may be the clutch hydraulics, but I went to the track back in the summer heat and never had a problem. I also did the thing where you push the clutch in and rev it to like 5K and the car did not move so I know the clutch disengages fully most of the time. I plan on doing the 02 slave and tick master cylinder after I get some money. I tried bleeding the clutch, but was worried about dropping tools in the bell housing so I stopped and just changed the fluid in the reservoir.
12-08-2008, 09:55 PM
#7
If you keep it at around 5.5k does the car creep forward? even very very slowly. Any movement would indicate the clutch is not fully disengaging.
