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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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Zilvia Member
![]() Join Date: Apr 2008
Location: Tempe, AZ
Age: 40
Posts: 281
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Need help with S14 RB25 Trans/Clutch problem!!
Ok guys, so I have an S14 with an RB25. It had a 6 puck sprung clutch and a 19lb (stock?) flywheel in it when I bought it. I didn't know what it had so I bought an ACT Extreme Clutch and a JUN Ultra Lightweight flywheel for it. (I plan on putting a bigger turbo in at some point) I swapped the clutch myself with a few friends and I replaced the throw out bearing when I did it. I put in a stock Nissan TOB. When I put the new stuff in, and put the tranny back in the car, the clutch seemed to act funny. I adjusted the adjuster thing thats right above the clutch pedal and got it working alright, except that the clutch pedal came out of the car farther to get the clutch to engage. (Sorry if this makes no sense) The old clutch had a short amount of travel with the clutch pedal, and the new one seemed to come out an inch before the clutch grabbed. I drove it like this a while and got sick of it so I went back to adjusting the pedal adjuster until it has less travel, which kept ending up making the car roll when the clutch pedal was fully to the floor. So I kept having to adjust back a little bit. I broke in the clutch according to the manual that came with it. I want to say ive put a good 1k to 1.5k miles on it already. I could hear the screaming noise or however you would say it sounds when I would start the car in 1st gear and let the clutch out fairly slowly (im guessing it was the throw out bearing going bad noise) It would NOT do this when I started out at a higher rpm, such as 3-4k. It would also NOT do it if I started the car out in 1st and gave it very little gas (so that the car seemed like it was an automatic and started out smooth). Anyways, I was driving the car the other day, and this old police car came beside me and kept flooring it and taking off like an idiot. He kept doing it for a good mile or so, so I decided to take off. I started in 1st, and started out slow, and then punched it and when I went to shift into 2nd the car seemed funny and it seemed like the car was stuck in 1st gear. I shifted into 2nd (it was hard to shift it into 2nd) so I just pulled over and went to see what happened. I tried to shift into 1st and it just grinded. I figured it was that adjuster thing so I kept playing with that and I had no luck. I can shift it into 1st if I slam it in, but it makes the clunking - metal on metal sound... Also I can shift into 2nd, 3rd, and 4th, but it shift in kind of hard (no clunking) and 5th gear seems harder than 2-3-4, and also does NOT clunk. Reverse seems the same as 2-3-4 and does NOT clunk. I have had the car sitting for about a week and I went back to play with the adjuster today to see if I could make any improvements.
So I went back today and I adjusted it so that the little rod was all the way into the master cylinder (all the way that I could screw in before the rod fell off and wasn't in the adjuster bracket.) The car still clunked into 1st, but 2nd - 5th worked fine (I tried starting the car in 2nd and it made a loud whirring sound (When the car was working fine with the new clutch, I would park the car backwards into a spot [that made the car roll forwards] and I wouldn't let the clutch out all of the way so that I could drive slowly into the spot, and it would make this nosie) (Also it would make the noise when I let the tire people at a tire store pull the car into the garage [where the car would have to drive uphill a little bit]) I adjusted the adjuster back out from the master cylinder a little bit and it seemed to shorten the pedal throw. Also the car has been making a squeeking noise while idling in neutral, like when I start up the car and let it sit for a minute. (it stops when I push the clutch pedal in just a little bit, or if I rest my foot on the clutch pedal.) Sorry for the long explanation, but I'm just trying to figure out whats going on. If anyone needs me to try to explain anything differently, I will certainly try to. ![]() Thanks guys. |
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