Jmoyet
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Everything posted by Jmoyet
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Yes I can stop it with my hands with some vibrations still happening. I've yet to change the oil on it might be something I'll be doing tomorrow on it. It's pretty much the only thing I haven't changed the fluids on. Hopefully it's not a failure in the making. If so I've been thinking about a 5 speed but still not sure if I wanna dump the originality of the series 1 240z.
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Engine mounts are good. I've inspected them in the past. This 240z barely has any surface rust. I've bolted everything down good when I installed new mounts and last week tried moving the transmission up and down where the driveshaft connects and no movement. So mounts are definitely good. I'm thinking it might be something internal. Only does it at 2nd and no other gear at any RPM. Mine does not have that plastic bushing at the base like other shifters it has an open end somewhat like a bracket at the base where a pin goes and has a metal pin going through it with a C clip connecting it to the rod that goes into the transmission. Iv tried finding a pic of it but this is the only one i could find. And at the middle pin there is 0 play at all. And besides that middle one wouldn't be the case since it moves up and down not side to side or at random directions.
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First thing I did when I bought the car was replace the diff and trans mount. Did it before and after installing new mounts. No noises no "ill" effects from it that I've noticed. Just unusual to see a shifter moving up and down while still in gear during acceleration. New mounts iv checked the shifter mounts its the series 1 style before it got changed. I also forgot to mention it is a 1/71 Series 1. My trans mount bracket does not have that leaf spring looking piece on it nor looks anything like that but the mount itself looks the same. Funny cuz the one every auto parts shows has 4 bolts coming out of it had to buy mine from zcardepot. *Edit* I also bought those hinge bushings awhile back, took the center console all apart only to find that the shifter mount is completely different.
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So as the title says is pretty much my problem. Now getting into more detail explaining the problem. Under acceleration it shift perfectly normal and accelerates fine but, under acceleration in 2nd gear the shifter itself wobbles up and down under acceleration, all other gears do it very minimal more so vibrates for the rest of the gears but 2nd gear you see it move up and down. Is this normal? Is this a sign of problems to come?
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So I got a solid diff mount and it did for my series 1 240z. Clunk went down but still clunks due to play at the axle hubs at the wheels. And replaced both u-joints on the driveshaft since it had a bad u-joint. Runs smoother but still clunk due to axle hub play and still rattles hard when letting go of the gas going above 60mph like something hammering. Checked the driveshaft it has no marks on it as all that would indicate any rubbing or hitting anything. So I'm still wondering what's causing the rattling/hammering
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I have a transmission mount ready for install. I ordered a solid mount for the differential. Waiting for it to arrive now to see if it fits the early differential mount without swapping everything out of the 72 model into my early 71. But yeah, I get the normal clunk when changing gear, Accel, deceleration typical of bad mounts. But the heavy pounding rattle at above 60mph only at dice is strange. When I press on the gas again it goes away and let go of the gas and rattles like hell. I won't be able to work on it till next week on my days off.. Yeah it's a daily driver.
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I couldnt find anything that described what I have just the usual clunk at changing gears typical of a bad mount. I have an early 1971 Datsun 240z with a 4 speed manual built in 1/71. All original to my knowledge. Besides the clunk at accel and decel (front diff mount that is no longer in production) I also have a loud clunking/rattle when i let go of the gas over 60mph then goes away under 60mph. Sounds like somebody with 2 hammers hitting the bottom of the car rapidly. When I have it up on jack stands it does the same on 2nd and 4th gear at idle. its louder on the drivers side wheel for some reason.. Quieter without the wheels. when i hold the drivers side wheel and let the passenger side spin away (yes its an open diff) it still makes the same loud clank on the drivers same if i hold the passenger side wheel. still louder on the drivers side.. and also jerks at the wheel when holding it.. Bad Diff?
