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Discussion Starter #1
After the new clutch and 5 speed tranny rebuild I now have gear grinding untill she warms up. Can hardly get it into second when cold.. After warming up it all stops and acts like the lady she is. Never had this type of problem so any advice would be helpful.
Also.... When warm, Quicksilver is launching like never before. Two black tire marks and smoke untill I let off. I am amaZed at the power delivery now and am having a blast smoking ricers and others alike. Turning 50 in December but not slowing down. Not with my Z at least. **** I love these cars.................Laterzzz
 

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Yeah I had the same problem till a couple of weeks ago, replaced the clutch and cruched into second until warm. Used the wrong oil. Way too thick.Replaced it with Castrol UMX-80. Problem solved. Sounds like the same problem. Hope it is as easily fixed as mine was. Good luck
Loops
83zx n/a
 

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I do agree with the others on the oil.

Did you replace the Pilot Bearing that is in the end of the crank shaft?

Wayne Monteath
Masham, Quebec.
 

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I think it could also be a failing clutch master or slave cylinder. These should both be replaced (cheap) with new tranny rebuild. I had identical symptoms recently with my Saab 9000T. Yes it's a different car, but basically clutches are all the same. In my case, the partially failed master cylinder was letting air into the system overnight. The next morning I would not be able to get the car in gear, until the car was warm, and after I pumped the clutch pedal several times.

On the other hand, on my 240Z, shifting does become easier, when the car is warmed up. The oil in my tranny may be a little thick as well. I think I am using Castrol 80W.

Good luck - Sean
 

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Hi Quicksilver-------------My .02 worth------It has been said that Redline transmission fluid helps greatly with notchy shifting problems. It's a synthetic oil, and is pricey, but everybody I've ever seen posting about it gave it excellent reviews. Most Z drivers use the Redline MTL, it seems. FWIW

Roadman
 

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It won't ever shift like a Beemer will it.

I always hoped that some day some new syncrows would smooth/quicken my tranny, but it sounds like everybodys works just like mine, and yes it got synthehtic in it, and its bearable after it warms up BUT ever since I drove my buddy's BMW I feel like I'm shifting a tug boat. I guess you do get what you pay for.
 

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The transmission should have 80/90 gear lube, It is possible they put ATF in it by mistake. A lot of newer cars use ATF in the transmission but it will cause shifting complaints in a Nissan 5 speed.
 

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Second the Redline...

Get some Redline MT-90. You will need 3 qts, even though the tranny will only take 2 1/4 qts. Here is a link for the Redline...
http://www.auto-motor-oil.com/redline.html
If your order is over $30.00, shipping is free.
Use Redline 75-90 gear oil for the differental, if interested. You may be able to get Redline locally... check the yellow pages in the Auto section for performance, speeed shops, ect. I got mine at a dirt track supply house in my town of Winchester, Va for $7.25 each.
 

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Discussion Starter #10
Ok Thanks guys

I will drain and refill with Redline I guess. Never had this problem prior to rebuild. Bearings, seals and syncros were all replaced. I suspected slave cylinder but it is new also. Maybe a little bleeding the system and new oil will fix the problem. I appreciate your help as always........QuickSilver........
 
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