720maniac Posted March 18, 2020 Report Share Posted March 18, 2020 Hello Guys, I'm looking for a bit of help. I own a 1984 Z24 4x4 Long Bed nissan 720 pick-up and I am looking forward rebuilding my transmission, which is a FS5W71B according to the tag placed on the right door frame of the truck. The thing is that I've found out plenty of rebuiild kits online ones with 61 mm counter bearing OD and others with 60 mm counter bearing OD. The main question is, Which one should I buy? If any additional info is requiered in order to answer my question, please let me know. Thanks in advance amigos, Greetings from Mexico. 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 2 hours ago, 720maniac said: Hello Guys, I'm looking for a bit of help. I own a 1984 Z24 4x4 Long Bed nissan 720 pick-up and I am looking forward rebuilding my transmission, which is a FS5W71B according to the tag placed on the right door frame of the truck. The thing is that I've found out plenty of rebuiild kits online ones with 61 mm counter bearing OD and others with 60 mm counter bearing OD. The main question is, Which one should I buy? If any additional info is requiered in order to answer my question, please let me know. Thanks in advance amigos, Greetings from Mexico. You probably wanna pull the transmission first to see what you actually have for a counter shaft bearing size..... I thought they were more like 56mm and 60mm... being a 4x4 thats the short tail 71b..... When I rebuilt I only needed to do the bearings so I sourced them through a bearing distributor..... What's actually wrong with yours? 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 1 minute ago, Crashtd420 said: You probably wanna pull the transmission first to see what you actually have for a counter shaft bearing size..... I thought they were more like 56mm and 60mm... being a 4x4 thats the short tail 71b..... When I rebuilt I only needed to do the bearings so I sourced them through a bearing distributor..... What's actually wrong with yours? I replaced the tranny oil on saturday, but the getting the shifted turned really hard when I try to get each speed in. I thought it was necessary to replace the syncronizers and bearings inside it. 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 I used these guys.... https://3bgsupply.com/bearings/ You could also look here.... https://www.midwesttrans.com/nissan-fs5w71-5-speed-manual-transmissions/ They have a lot of the other parts too.... 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 6 minutes ago, Crashtd420 said: I used these guys.... https://3bgsupply.com/bearings/ You could also look here.... https://www.midwesttrans.com/nissan-fs5w71-5-speed-manual-transmissions/ They have a lot of the other parts too.... So buddy, basically you're saying that theres no way of knowing the counter bearing diameter without taking down the tranny? That is sad. 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 4 minutes ago, 720maniac said: So buddy, basically you're saying that theres no way of knowing the counter bearing diameter without taking down the tranny? That is sad. No not really.... you can make a guess but you dont know what was ever done before..... I have the same transmission but the 2 wheel drive version.... it had the 56mm bearing.... Some one could have done a front case swap and changed to the larger bearing... So was this happening before you changed the fluid? Did you use a gl4 type of fluid? 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 Wait sorry i am wrong... it did have the larger bearing... 62mm... so you should be ok assuming it is the 62mm I did an L series case swap and had to change the bearing to a 56.... And yes it should be 62mm bearing not 60 or 61mm... 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 Yes, I used GL4 fluid, however, the truck ran pretty well before that, thought that it would improve the driving, but I see it didn't. 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 Then again I would still be cautious... you have an 84 and that seems to be when the change to the larger bearing occured... So there is a chance it could still be the 56mm.... I'm sure someone will come along correcting me if I am wrong.... 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 6 minutes ago, 720maniac said: Yes, I used GL4 fluid, however, the truck ran pretty well before that, thought that it would improve the driving, but I see it didn't. well dont be too hasty to say it's a problem inside the transmission... very well could be a simple as a clutch adjustment.... So what are the actual symptoms? Hard to ship gears? Grinds as you try to shift? Start with the simple stuff.... 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 1 minute ago, Crashtd420 said: Then again I would still be cautious... you have an 84 and that seems to be when the change to the larger bearing occured... So there is a chance it could still be the 56mm.... I'm sure someone will come along correcting me if I am wrong.... In the case that my transmission comes with the 56mm bearing diameter, would de syncro-rings be the same for every FS5W71 tranny? I mean, could I purchase any rebuild kit for any kind of FS5W71B tranny and use the syncro-rings? 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 1 minute ago, Crashtd420 said: well dont be too hasty to say it's a problem inside the transmission... very well could be a simple as a clutch adjustment.... So what are the actual symptoms? Hard to ship gears? Grinds as you try to shift? Start with the simple stuff.... Those are the symptoms, exactly those, but I wanted to give a refresh to the tranny also. 1 Quote Link to comment
datzenmike Posted March 18, 2020 Report Share Posted March 18, 2020 45 minutes ago, 720maniac said: ........but I wanted to give a refresh to the tranny also. Years of experience have taught me this, if nothing else.... Never try to fix something that isn't broken. At the least it is a waste of time, at worst you cause a problem not there now. 1/ Check the transmission fluid. The fill hole is half way up (usually the left) side. You should be able to dip your little finger in the hole and touch the oil. If low you can either top it up, or, if you have never changed the oil in the last 30K miles or don't know when it was changed last, change it now. The drain bung is on the bottom. It takes 2 liters of GL-4 (NOT GL-5) 80/90w. 2/ Check your clutch master fluid and top it up. Look at the slave push rod to the clutch arm on the side of the transmission behind the right front tire while someone depresses the clutch pedal several times. Clutch arm should move 1.18" or close to that. If not enough movement, open the slave bleeder and have the operator depress the pedal to let out any bubbles. Close the bleeder while the pedal is held down and then let the pedal up. Depress and hold the pedal down, and open the bleeder to let out fluid and any bubbles. Check the master reservoir and keep topped up. Keep repeating until you get only fluid coming out. Close the bleeder and let the pedal up. Take for a drive. 3/ If still trouble to shift. Place in neutral with the engine running, clutch pedal up. Depress pedal and shift into reverse s l o w l y. If there is a constant ticking of gear teeth lightly grinding this could be the pressure plate rubbing the clutch disc and spinning it, or the clutch disc is damaged and rubbing either the pressure plate, the flywheel, or both. 1 Quote Link to comment
Crashtd420 Posted March 18, 2020 Report Share Posted March 18, 2020 37 minutes ago, 720maniac said: Those are the symptoms, exactly those, but I wanted to give a refresh to the tranny also. I would still look at the clutch adjustment first.... If you really want to get into that's on you... but i would still pull the transmission and inspecting the parts first... I wouldn't buy just any random kit if your really looking to open the transmission especially since there are correct ones specific to the transmission and truck... Just found this.... has a good brand bearing and fits the 62mm.... https://www.transmissionpartsdistributors.com/fs5w71c-transmission-rebuild-kit-with-synchro-rings-fits-84-86-nissan-720-pickup-bk133ws/ 1 Quote Link to comment
720maniac Posted March 18, 2020 Author Report Share Posted March 18, 2020 Thank you both guys, I will look into the clutch first and hope it gets better. 2 Quote Link to comment
Charlie69 Posted March 19, 2020 Report Share Posted March 19, 2020 720s have a fixed length rod no adjustment like on a 521. Quote Link to comment
Crashtd420 Posted March 19, 2020 Report Share Posted March 19, 2020 8 hours ago, Charlie69 said: 720s have a fixed length rod no adjustment like on a 521. What about at the pedal? Still I wouldn't be so quick to pull the transmission without checking some external items first.... 1 Quote Link to comment
Charlie69 Posted March 20, 2020 Report Share Posted March 20, 2020 (edited) Pedal rod is adjustable into the power booster. Edited March 21, 2020 by Charlie69 1 Quote Link to comment
720maniac Posted March 20, 2020 Author Report Share Posted March 20, 2020 Hello to all, Guys thanks a lot for your help, I think i will get the clutch checked this weekend. 1 Quote Link to comment
Charlie69 Posted March 20, 2020 Report Share Posted March 20, 2020 (edited) Look to see if the clutch master is leaking at the brake booster and crawl under it to see if the clutch slave is leaking these are to easy visual checks you can do your self. If eiter or both are leaking fluid change them out with new. Whenever I change a slave cylinder I change the hydraulic hose also. Edited March 20, 2020 by Charlie69 Quote Link to comment
720maniac Posted March 23, 2020 Author Report Share Posted March 23, 2020 Hello all, On saturday, I took my truck to the mechanic, the problem was a missing bolt between the Transmission and the Engine, due the lack of this, the tranny got apart from the engine about 1 inch so the clutch wouldn't latch/unlatch well. Thanks all for the help and opinions. 2 Quote Link to comment
datzenmike Posted March 23, 2020 Report Share Posted March 23, 2020 That'll do it. 1 Quote Link to comment
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