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2nd gen. 6spd. swap discussion thread

3736 Views 17 Replies 9 Participants Last post by  nizmut
I'm starting this thread as a discussion about the details of swapping a 6spd into an automatic equipped 2nd gen. If you are just stating your opinion on which is better, please do not post in this thread. I want to keep it on topic and get as much knowledge compiled together as possible.

First off, I know the actual transmission needs to be purchased. Then there are the obvious things like clutch pedal, brake pedal, center console trim, clutch reservoir, etc. Other than the obvious, I'm trying to compile a list of what else would be needed. Does anybody know if the auto driveshaft will work w/ a manual tranny? Also, I dont know if the gauge cluster would need to be swapped. I don't think it would, but since it displays PRND, Im not sure if theres a difference between the two. Also, my main question is about the ECU'S and wiring. What I'm thinking is that this would essentially be "dumbing down" the system and wouldnt be as tough as swapping in an automatic tranny. I guess a new lower harness might be needed, and the ecu would be a big puzzle. In my case, I have a 2wd Nismo. The only 6spd Nismo is 4wd. Possibly the easiest thing would be to get an SE 6spd ecu, and rewire the locker.

I'm not looking at doing a build yet, but this has been in the back of my mind for quite some time. I have too much time/ money into my truck to get something else, and to be honest, would enjoy the challenge of doing this. I would have to wait until my 240 build is done and drivable before I tackled something like this though. I just think a 2wd 6spd. Nismo would be sick.
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I believe youll need a new master cylinder as well. I know on my 5spd the clutch gets its fluid from the brake fluid container. Otherwise what you could do is just set up another container which would work just fine as well. The gauge cluster shouldnt need to be changed but im not 100%, i simply dont see why you would have to. It probably wouldnt be a bad idea to climb under your truck and see what the tranny has pluged into it, and crawl under a 6spd and see if theres anything pluged into that one.
drive shaft might might also have to be altered a little like you said, but thats simply droping it off at a shop for a few hours. Also look into the tranny mount/cross member and make sure they are the same from auto to manual.
just park the trucks right next to each other and get on some roller creepers to check everything under the truck and look at the ecus to see if theres any visible difference in them.
I know something in my clutch area is starting to squeek, but thats just because its been doused with muddy water so much.

As far as the cold giving issues with the clutch, ive never had the problem. However im in nothern california so it doesnt get close to that temperature.
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