Drill Mod done, but still shifting hard?
12-23-2007, 11:11 AM
#2
When I first installed my heads/cam, I could no longer shift the car at high rpms. The slave was fresh with about 10k on it, the fluid was good, drill mod done, no air in the line, so I knew the culprit was most likely the stock master cylinder which had about 44k on it.
So I ordered up a McLeod master cylinder, installed it, flushed the fluid out, and bled the system. It's been kicking *** ever since! The stocker just didn't have the ***** to release the pressure plate at those high rpms (6700 shift light setting).
How many miles are on your car? How many are on the clutch, slave, master? Have you ever flushed and replaced the fluid in your hydraulic system? What about the trans itself, have you ever changed the fluid in it?
I have had great results with Valvoline Synpower fluid for the clutch hydraulics, and Pennzoil Synchromesh in the tranny.
So I ordered up a McLeod master cylinder, installed it, flushed the fluid out, and bled the system. It's been kicking *** ever since! The stocker just didn't have the ***** to release the pressure plate at those high rpms (6700 shift light setting).
How many miles are on your car? How many are on the clutch, slave, master? Have you ever flushed and replaced the fluid in your hydraulic system? What about the trans itself, have you ever changed the fluid in it?
I have had great results with Valvoline Synpower fluid for the clutch hydraulics, and Pennzoil Synchromesh in the tranny.
12-24-2007, 07:47 PM
#3
The clutch has been changed to an aftermarket one. It has about 10,000 miles on it. The slave and master cylinder have been change too. Its not the one you mentioned though. Should I get a new master cylinder for which the power I am puttin down.
Yes the transmission fluid has been changed about the same time 10,000 miles to dextron. Car has 70,000 miles on it.
Yes the transmission fluid has been changed about the same time 10,000 miles to dextron. Car has 70,000 miles on it.
12-24-2007, 10:22 PM
#4
I think part of the problem is the clutch your using. In your sig it says you have a centerforce clutch. Centerforce pressure plates have weights on the pressure plate fingers that makes the pressure plate clamp harder on the disc the higher the rpms get, making it harder for your slave cylinder to move the pressure plate for high rpm shifting.
12-24-2007, 10:43 PM
#6
I think part of the problem is the clutch your using. In your sig it says you have a centerforce clutch. Centerforce pressure plates have weights on the pressure plate fingers that makes the pressure plate clamp harder on the disc the higher the rpms get, making it harder for your slave cylinder to move the pressure plate for high rpm shifting.
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12-25-2007, 10:34 AM
#9
Well if your master cylinder is pretty new, I would think it should be OK, but, the McLeod is a beefy unit. My stocker seemed perfect til the heads/cam. Now I don't know if it was coincidence or what, but it just would NOT shift for **** after the new power and higher shift points.
As embarrassing as it is, the first time I tried taking it to the track, I was only able to muster a 114-115 trap! I was having such a hard time getting it to shift, that I sounded like a complete idiot going down the track with the long delays between shifts.
Here's the clencher, I installed the McLeod, and the street test revealed awesome shifts once more, and the track backed it up as well. The car started trapping 121-122 mph!
So maybe the McLeod will have the "*****" to release the pressure plate from the flywheel where the stocker didn't.
As embarrassing as it is, the first time I tried taking it to the track, I was only able to muster a 114-115 trap! I was having such a hard time getting it to shift, that I sounded like a complete idiot going down the track with the long delays between shifts.
Here's the clencher, I installed the McLeod, and the street test revealed awesome shifts once more, and the track backed it up as well. The car started trapping 121-122 mph!
So maybe the McLeod will have the "*****" to release the pressure plate from the flywheel where the stocker didn't.