I read the thread on putting a manual into an automatic B12, and i was wondering how much easier (and cheaper) it would be to put a 5 speed into a 4-speed?
I do alot of highway miles everyday (~65 Mph) and im at atleast 3500 rpm the entire time so im thinking a 5speed would save me some gas money in the end.
I read the thread on putting a manual into an automatic B12, and i was wondering how much easier (and cheaper) it would be to put a 5 speed into a 4-speed?
I do alot of highway miles everyday (~65 Mph) and im at atleast 3500 rpm the entire time so im thinking a 5speed would save me some gas money in the end.
Thanks!
My B12 sounds like a swarm of pissed of hornets when I get it up to around 75. I have thought about the 4 speed to 5 upgrade as well, but i don't want to deal with the 5th gear pop out issue.
My B12 sounds like a swarm of pissed of hornets when I get it up to around 75. I have thought about the 4 speed to 5 upgrade as well, but i don't want to deal with the 5th gear pop out issue.
Haha yeah, same here, and i have no muffler...just a pipe from the engine to the back of the car...so i know what you mean...
I havent heard of the 5th gear issue, but im sure its better than having my ears ringing all through Trig...
yeah, my exhaust off too..till i get a whole exhaust system built. i deninately doing de 5spd upgrade sometime this year. when i drive my B12 and den my dad's, i notice a difference in performance from 4th gear onward.
I have sucessfuly done the swap from automatic to manual. Origonally swapped in a 5 speed, but due to the 5th gear pop-out problem eventally the 5 speed chewed itself apart. I next swapped in a 4 speed manual, and it has been in there for over a year now with no problems.
The transmission mounts for the automatic, 5 speed manual, and 4 speed manual are all different. If you put in a 5 speed you will need the mounts from the donor car as well as part of the transmission mount that the battery tray bolts to also. The 4 speed manual transmission can use all of the same mounts as the 5 speed EXCEPT for the mount that connects from the back of the transmission, to the mount under the battery tray, because the one for the 5 speed is too long to bolt to the end of the 4 speed casing.
The CV axles from the automatic will fit the other transmissions, but are smaller in diameter. If you are going to get new CV axles any time soon I would suggest going with the ones from the manual transmission, because they are bigger and stronger.
Bob
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89 Sentra owner 9 years 205,000 miles and counting!
i did a auto to maunal swap too as well. and yes, it's true about tha 4 and 5 spd mounts....thats if the 4speed box is from the 1.3l. i have both boxes, and the 1.5l box is longer than the 1.3l box. when i had to put in the 1.3l box for a short while, since i had to get some welding done to my 1.5 box, i realise the mount was longer, so we used a longer bolt and some spacers and washers to get a tight fit ( dont think it would be reconmended but hey....) so i think my 1.5l g-box mount should fit the 5spd box. naturally, the 1.3l gearing is shorter than the 1.5l's, it's a pain on the highway. i really wanna try a 5spd box, but i'll keep the 4spd as a spare.
Ok, after much waiting, I have found a VERY cheap deal on a 5-speed from an '86 sentra. Its not new, but only 96k on it. Is this going to work or do I need a closer year?
I don't know which mounts you say are different from the 4 to 5 spped, my car came with the 4 speed and I picked up a new 5 speed and my mechanic swapped it right in, didn't need to pick up any other new parts and he never said anything about anything not lining up properly.
so im thinking a 5speed would save me some gas money in the end. 
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