lightspeed

I have 60k on the car/driveline. Previously I would be contantly catching a few teeth when shifting 1st-2nd gear.

Had the clutch replaced due to wear (added RPS), and the problem persisted. Noticed that the clutch hydrolic fluid was very dark (...makes you wonder about the mechanic, huh?, did flush it...). Flushed it out, and action much improved. Possibly a slow action on the clutch due to some old, sludgy fluid?

No I get a tooth now and again, escpecially when I am enjoying a "spirited" drive. Is this normal?

b300z

yea, my spirited drives also have the same consequences. usually into third.
i dont think its normal

CanyonCarver

If you know your clutch is also properly adjusted, you might then try putting some new/fresh oil in the tranny. Old, heat cycled, oil tends to thin out and lose it's lubricity. This having an effect on the operation of the syncros. If the oil doesn't help, it's probably your syncros that are worn out.

You might also try accelerating to a higher rpm before shifting, unless of course you're already shifting at redline. There is a certain rpm in every gear where you can actually shift without the clutch and not grind. In older cars, you learn to find this rpm range because the syncros wear out and it's about the only way to get into the gears when using the clutch.

91zxtt

I hear the grinding sound in shifting into 4th on 'spirited' drives. It common on these cars. Not necessarily right, but common. New tranny fluid should help, but you may not notice much of a difference. Call it a nature of the beast.

Riz Z Speed

Redline MT-90 fluid is recommended for our manual trannys. Especially when the syncros start to go.

OrangeZ32

Try sitting at a stop light with your foot on the clutch while in neutral. Than Than when the light turns green shift into 1st. If it grinds its a very good possibility that you have a leaky slave cylinder. I have that problem, and it's in no way problematic, I unconciously shift differently because of the problem. My syncros do occasionally grind but I'm not too worried about it cause in a year or so i order my front clip.

91zxtt

check out www.myoilshop.com for some pretty good prices on Redline Oil products.

topless93

I had the same sometime grinding when shifting at higher rpm's. Switched both tranny and differential with AMSOIL 75W-90, after some time I have noticed an easier shifting from gear to gear an no more grinding. I was going to use REDLINE, but after talking to those that have used both would prefer to use AMSIOL when they can find it. Everyone did say that REDLINE is also a great product, you can't go wrong with either.

Rogue93TT

A little late on the post but you should learn to double clutch to help this problem until it's fixed.

bardabe

how DO!? you double clutch???!

Rogue93TT

This is a great article on how to why and when. Double Clutching

CanyonCarver

Before the application of automatic transmissions in big rig trucks, you almost always had to double-clutch and double-declutch 'em all of the time. It's the fastest way to accelerate in them. Otherwise you'd have to wait for the engine rpms to drop down to the appropriate level before the gears would engage. If you weren''t in a hurry, you didn't use the clutch at all, except for starting and stopping. My attitude was that if you weren't in a hurry, you weren't making any money. :cheers:

WhtFairLadyZ

I have heard that the grinding between 3rd and 4th then 4th to 5th is common in the Z32. Supposedly, Nissan put a weak syncro in the cars. The '94 model is supposed to have a beifier syncro to correct the problem. Another possibility for the grindin gears is to check your shifter bushings. You may be shiftin properly, but u just cant slot it in the right spot. I need to replace my gear oils soon, I have new clutch fluid, new slave cylinder, new master cylinder, and a good clutch. And the came still persists to grind every no and then. Hey try the Drift King method, double clutchin with heal toe. That is hard. I ve been trying to do that.