JMortensen Posted October 2, 2003 Share Posted October 2, 2003 I have been driving my Z about once every 2 months or so. Not exactly a daily driver anymore, but I drove it yesterday, and it is popping out of 3rd on decel, and was already starting to pop out of 2nd earlier. There is also a grumbling noise coming from the trans with the clutch out in neutral, which seems to be getting louder as time goes by. Noise disappears when you push the clutch in. It shifts smoothly into all gears. My understanding is that this is pretty common, and the cause is worn countershaft bearings. I got this tranny from a parts ZX about 8 years ago, and I've probably put 50K on it, and I have no idea how many miles it had before that, car looked like it had 250K. I realized I was going to run into this at some point, so I bought a rebuild kit when I worked for a shop. It is an RPM SuperKit. Has anyone used this kit? Are the bearings decent? I would rather use the synchros and buy Timken bearings and National Seals if it would mean that the rebuild would last longer. Also, how hard is the rebuild? That's kind of hard to quantify, but I've only done 1 manual trans in a 4 cyl '79 Mustang, and that was 12 years ago or so, and if this has any quirky stuff that only an expert can do, I don't mind taking it to a shop. FSM has specs on the big nut on the mainshaft and weird stuff like that? I'd need to get one so I'm asking before I plunk down the $$$. Just looking for some feedback. Is my diagnosis correct? Should I attempt myself? FSM have everything I need? Thanks, Jon Quote Link to comment Share on other sites More sharing options...
David K Posted October 2, 2003 Share Posted October 2, 2003 Ive rebuilt my 2 5-speeds in my messy garage. I wouldnt hesitate to do it yourself. Its real easy, not much to them. I didnt know what i was doing, but i took the case apart one day and i said to myself, "this is all there is in here?". 8) Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 2, 2003 Author Share Posted October 2, 2003 That's good feedback, thanks David. Anyone agree/disagree with the diagnosis, or have an opinion on the rebuild kit? Easy as it may be, I only want to do it once... Jon Quote Link to comment Share on other sites More sharing options...
gramercyjam Posted October 2, 2003 Share Posted October 2, 2003 I rebuilt the BW T5 on my ZXT years back. Not much to it really. The only issue I recall was getting some bearing off was tough because I didn't have the right tools to press it off. As I recall there are ways to get some stuff back in wrong, but you will know right away because you won't be able to shift it. Quote Link to comment Share on other sites More sharing options...
260DET Posted October 3, 2003 Share Posted October 3, 2003 I rebuilt a Nissan, not a T5, five speed gearbox recently. A workshop manual will be in my fussy opinion essential although the Nissan manual I used was not the best as to the reassembly sequence. You may need a press to get all the bearings off but basically its a home workshop job. There are a couple of items, circlips and the countershaft front bearing shim, for which several optional thicknesses are available. Can't comment on your kit, mine included the right transmission specification NTN bearings. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 3, 2003 Author Share Posted October 3, 2003 Thanks, all responses are appreciated. Here's a more direct question related to the bearings. The kit I have came with Nachi bearings. Any opinions on Nachi. I've never heard of them... Jon Quote Link to comment Share on other sites More sharing options...
260DET Posted October 4, 2003 Share Posted October 4, 2003 From memory one or two of the original bearings in my box were Nachi. Providing they are made in Japan they should be OK. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 4, 2003 Author Share Posted October 4, 2003 Thanks again. Jon Quote Link to comment Share on other sites More sharing options...
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