Solve my transmission issue!

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c-rad
Posts: 2584
Joined: Sun Sep 19, 2004 5:10 pm
Car: 1991 Nissan 240SX w/CA18DET
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Here's the rundown of the issue and what I have figured out so far--

All of a sudden one day I was driving, and as I started to let the clutch out from a dead stop, the car started bucking HARD. Felt like the wheel-hop except I was going about 5mph. I shift to second and the transition is smooth as normal. Likewise is 3rd. I get to 4th gear and when I let off the gas, the transmission goes back into neutral. If I hold it in 4th when I let off the gas, it will stay there. Ok, so now I come to a stop once again. It's now difficult to get it into 1st gear (but it does go in). Let the clutch out, and the same jerking effect is there. Something to note-- when I depress the clutch, it "sounds" like the clutch disk is still making contact with the flywheel/pressure plate. At this point, I am convinced the transmission is just plain broken so I park the car.

Fast forward to last week. I go out to peruse the engine bay and maybe do a little cleaning. As I am looking around the transmission bellhousing, I notice that all but ONE of my transmission bolts are missing! The only one still holding the transmission to the block is the small one that sits below the starter. Now I am thinking that the transmission is seperating itself from the block when I depress the clutch and that is what is giving me my problems. I've got a set of transmission bolts on the way, and I have a spare transmission sitting here on stand-by.

For the record, the clutch is a Centerforce Dual Friction and has less than 400 miles on it. Flywheel was resurfaced at the time it was installed. I am using a KA transmission on a CA18 bellhousing. The KA transmission was with my KA motor that I removed and never gave me an issue before the swap. The dust shield was installed. Slave cylinder is fairly new. I noticed a little clutch fluid around the rubber boot for the clutch pedal in the car though.

Can someone please shed some light on this for me and tell me whether I am on the right track or not? Or can anyone pinpoint the cause just by the novel I wrote? TIA!


180fan
Posts: 7799
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

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The all but one dealy could very well cause the bucking, since the fork wouldn't be able to disengage the clutch all the way, it'd always be grabbing or rocking around.

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kamikazeee
Posts: 536
Joined: Fri Jul 07, 2006 12:09 pm
Car: 1991 240sx
Location: Tinley Park, Il,

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Idk the answer to ur question, but I do have a question, how is the dual friction clutch, cuz I want to get it but I don't know If it's good for my kind of shifting (lot of dropping the clutch at corners ), plus where did u get the kouki rims?, do they look good from other angles?

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ricebike
Posts: 3381
Joined: Sat Feb 15, 2003 7:03 pm
Car: 1989 240sx se 5spd (donated to my brother in law)
2002 Quest
2005 Altima
Location: CNJ

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c-rad wrote: I noticed a little clutch fluid around the rubber boot for the clutch pedal in the car though.
to add, that aint normal... invest on a new master cylinder as well...

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AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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Um...your engine was connected to your transmission by 1 bolt?

100 abso-****ing-lutely percent sure that is your problem.


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