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6 speed fubared?

6962 Views 46 Replies 15 Participants Last post by  FlightDeck
Wondering if anyone has had similar problems with Frontier or any other car/truck? Go to put truck into 1st gear from netural and it can be a real pain in the butt, shift to second and can barely get it out of first (couple pumps with the clutch seems to cure this), getting it into second from first is a pain as well all other shifts seem normal except first and second. Now I realize on cold mornings manual trannys are some times a little sticky, but I really have to put some force into it. This seems to happen randomally when the trannys is warm as well, any thoughts, I understand cars pretty well, but when it comes to transmissions I'm lost
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How does your clutch fluid look?

Also, how many miles since the last diff fluid swap?
145 kilometers (aprox 90000 miles, I think) for some odd reason I cant seem to find a clutch fluid resivior(sp). Looking at the chilton manual it shows one, but I aint got one on my truck. Looks like the resivoir is tied into the brake resivoir???? I'm usually really good at changing my fluids, probley about 15000 kilometers on diff fluids.
Okay, I am a little more confused. It sounds as if you have ~90k miles on your truck and you tend to swap diff fluids around the 10k miles mark but what about the trans fluid? If it has been 90k, it may be time, lol.

I also have no clue where the clutch resi is but once you find it, it may be low which could cause your issues.
A leaking slave cylinder as well as the clutch master cylinder can cause shifting issues.

Clint
Trans fluid swaped same time diff fluids about 15000 kilometers ago, not every 15000. Clint do you have a resivoir on your 6 speed, if so care to tell me where it is because I swear I dont see one where it should be. Maybe an 05 thing?
I will go look now. I just got the truck a few days ago and need to see where it is. They are usually located in the drivers side near the hood hinge.

Clint
I just looked and all I see it the actuator on the firewall and the hydraulic line but no container to hold fluid. The line crosses to the passenger side and turns down to the bottom somewhere. Now I too want to know the answer.

Clint
Found this picture. There is no container and on the truck it looks upside down.

Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com


Does the pedal ever stick to the floor or not come right up? My nephew had a bad slave cylinder and after replacement all was fine.

Clint
exactly what you did I did, follow line across and it goes down into the abyss. Pedal seems normal to me.
As far as I know the only fill plug is on the actuall tranny under the truck. I changed my own fluid and that is where I did the drain and fill from.
As far as I know the only fill plug is on the actuall tranny under the truck. I changed my own fluid and that is where I did the drain and fill from.
This is true for the tranny but they are talking about the clutch fluid. I find it a bit odd if they use the same fluid for both the brakes and clutch and if so, I would be swapping that every 6months instead of my normal 12months.
This is true for the tranny but they are talking about the clutch fluid. I find it a bit odd if they use the same fluid for both the brakes and clutch and if so, I would be swapping that every 6months instead of my normal 12months.
Gotcha, I read too quickly. Thanks
the clutch shares fluid from the brake master cylinder reservoir it doesn't have its own reservoir
The 2nd Gens draw their clutch fluid from the brake fluid reservior. You can see a tube running from the clutch master cylinder to it.

Are you running GL-4 Grade tranny oil pidge? If you're running GL-5, you'll not be pleased at the shift action nor in the longevity of your synchros.
I'll be honest with you Fitz I really dont know what they put in there, it was nissan that did the change so I'm hopin they know, but I do realize it can happen. I'll have to look that up "G-L5"
So if the clutch master cylinder has issues one would need to change the brake master cylinder as they are one unit?

What about the slave cylinder on the tranny?

I have an auto so I'm not sure how these trucks are set up but on my old Yota' I replaced both the clutch master cylinder and slave cylinder and it seemed to help the rough shifting somewhat. Also changed the tranny fluid.

My next step was to replace the clutch but sold it.

May want to take it into a reputable mechanic or the dealer and have it diagnosed before throwing money at it.
clutch master and brake master have nothing to do with each other except for the fact that they are connected by the fluid reservoir. If you have to replace the clutch master you should do the slave as well. If the fluid is contaminated for the clutch it is for the brakes as well, time for a flush.

Changing the trans fluid is a great idea, I change in my bimmers once a year, rear end as well, synthetic!
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