Transmission issues

eric96ser · 11-03-2004, 10:58 AM

I've had a new clutch for the Sentra for about 6 months now, and I finally started to install it last night. My goal was to stop at 9:00 no matter where I was in taking the transmission off the car. I started at 7:00 and cleaned up the garage for a few minutes so I wouldn't have junk and car parts all over the place. At 8:59, the transmission was on the ground.

I did continue working until 9:30, because I wanted to open the transmission up and see if the 1st gear syncros were worn out. They didn't show any signs of being damaged. The reason I checked them out, is because I have trouble getting the car into 1st gear if the car is moving. If I put the car in neutral, clutch out, clutch in, it goes right into gear. Now I'm thinking it could be the fact that the case half is from another transmission. When I put the current transmission together, I couldn't remove the reverse switch, so I used the case half from one transmission, with the bellhousing from another. The service manual says that the case halves are different thicknesses to shim the gears. The flywheel and pressure plate also had hot spots on them, so its either from me slipping the clutch, or the clutch wasn't adjusted correct. The clutch not disengaing could be why its hard to get into 1st gear. Thoughts? Here are some of the pics : transmission pics

totaled200ser · 11-03-2004, 11:52 AM

i have never been able to put an sr20 in first unless almost completely stopped, just a characteristic of the tranny, i think it is actually a saftey feature

El Gabito · 11-03-2004, 11:53 AM

I've never really been able to easily go into first on any manual car (only had 3, so I'm not vastly experienced or anything).

eric96ser · 11-03-2004, 12:02 PM

I have no problem with it in my B14. Maybe is has something to do with using Redline fluid.

98sr20ve · 11-03-2004, 12:38 PM

Quote:

Originally Posted by eric96ser

I have no problem with it in my B14. Maybe is has something to do with using Redline fluid.

I can on my car. I always thought it was a syncro issue. Good luck with it.

sethticlees · 11-04-2004, 07:15 AM

Sometimes if you double clutch it will work. You got to slow way down though.

supercowboy · 11-04-2004, 09:02 AM

your problem was the clutch would not release completely. The whole idea of the clutch when you push it in should stop moving. If the clutch is still moving the pressure plate is still clamping the clutch. You have to make sure the clutch is being released completely. What type of clutch do you have. Most ACT xtreme clutches I have installed must be shimmed, because the fingers touch the clutch disc and does not completely disengage. How much slack did you have on your cable. Where did your clutch start to grab.

eric96ser · 11-04-2004, 10:27 AM

I had a Key Value clutch, but now it has a B15 PP and disc. After seeing the hot spots on the PP, I figured the clutch wasn't releasing all the way.

eric96ser · 11-06-2004, 10:51 PM

Update: I finished the car this morning, and I'll be damned if the clutch doesn't feel the same. The reason behind replacing the clutch was to get rid of the very light pedal. I'm still having 1st gear issues, but I think a thicker fluid or Redline MT90 will help. The clutch cable is about 4 years old, so I don't see that being the reason for the light pedal. I also have some vibration when pressing the pedal in just slightly. Any ideas?

whitehawk · 11-07-2004, 11:44 AM

I just put in a used stock clutch in my se-r before I sold it. The pedal had the vibration slightly pressed too. I think it was uneven fingers on the pressure plate. Is the b15 pp suppose to be stronger/harder then stock?

worms · 11-07-2004, 10:05 PM

I noticed some of the same things on my '02 GXE Sentra.

Won't go into first unless you're below 5 mph or you blip the engine to bring it up in RPMs and also I have a slight peddle vibe when the clutch is slightly deressed.

My mechanic drove the car and said everything is good ***' and the synchros are in perfect shape.

btw comming from a driving a saturn (1.9L I4) the throttle response in the sentra is so much quicker.

oz_pulsarsss · 05-15-2005, 11:12 AM

You might find that there is a pin inside the gearbox that prevents you going into 1st gear while the gears are moving to fast. Its there to help prevent you damaging the gears. All the Sr20 powered pulsars in Australia do the same thing. Unless the pin has been busted. Then you can get into first even at 100m/h.