FD transmission shaft upgrade for 20b
#1
FD transmission shaft upgrade for 20b
there was a guy who upgraded his FD transmission shaft to custom made 300M shaft on his tracked FI 20b powered rx7 with wide rear stickies.
I couldn't locate his post with search. Do you guys know the outcome of the transmission? How long did it last? I am between T6060 vs. shaft upgrade right now... I used to pick up FD transmission for $150-200 but now they are becoming more rare and hard to find.
Thank you.
I couldn't locate his post with search. Do you guys know the outcome of the transmission? How long did it last? I am between T6060 vs. shaft upgrade right now... I used to pick up FD transmission for $150-200 but now they are becoming more rare and hard to find.
Thank you.
#3
Senior Member
Instead of one race and breaking it lasted about 6 and broke. In my opinion it is not the best solution as it is still weak. The t6060 is a newer better version of the t56 but will not fit as it is larger and will hit the tunnel.
I still think the t56 is the best solution . It is reasonably priced , good ratios, strong, and all the details on installation are well documented by a few member builds.
I still think the t56 is the best solution . It is reasonably priced , good ratios, strong, and all the details on installation are well documented by a few member builds.
#6
Lives on the Forum
iTrader: (8)
Yah, my transmission broke on the 5th track day. But for comparison, I broke 4 stock ones in 3-5 laps like clockwork before. So its definitely much stronger. I don't think the transmission would ever break on the street, you guys have to realize I'm running 335 hoosier slicks with a locking differential and beating the limit out of the car.
thewird
thewird
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#10
Lives on the Forum
iTrader: (8)
The problem is the shafts separating and gear strength which is why upgrading the the mainshaft and treating the gears helps. Preventing gearbox movement might help too I guess. But I've already decided on a 6 speed sequential gearbox so done with stock gearbox's.
To put things into perspective... The inside of the tire barely fits a finger between the coilover spring... Breaking on the track is different from breaking on the street
thewird
To put things into perspective... The inside of the tire barely fits a finger between the coilover spring... Breaking on the track is different from breaking on the street
thewird
#11
jesus, that puts things into perspective. that rear tire is wider than my fat ***.
what sequential are you getting?
I mentioned case twisting because I thought it is the case twisting that separated the shafts which should separate the gear teeth and shear them.
what sequential are you getting?
I mentioned case twisting because I thought it is the case twisting that separated the shafts which should separate the gear teeth and shear them.
#14
There is a company in poland makeing "bulletproof" gearboxes out of the fc/fd gearbox and even straight cut gears, dog engagement and so on....but they cost like a sequential box more or less
#16
Rotor Head Extreme
iTrader: (8)
The problem is the shafts separating and gear strength which is why upgrading the the mainshaft and treating the gears helps. Preventing gearbox movement might help too I guess. But I've already decided on a 6 speed sequential gearbox so done with stock gearbox's.
To put things into perspective... The inside of the tire barely fits a finger between the coilover spring... Breaking on the track is different from breaking on the street
thewird
To put things into perspective... The inside of the tire barely fits a finger between the coilover spring... Breaking on the track is different from breaking on the street
thewird
How come you not running pettit flares on that beast?
#19
Bad new for all. Liberty makes the upgraded shaft but doesn't make it out of 300M material anymore. I wouldn't hesitate to do business with this company in the future though. Seems like very honest group of people. If Paul told me he's selling me the 300M shaft, I wouldn't have known the difference, but they were very transparent. They now make the shaft out of 40-- series steel which they claim is stronger than stock but not as strong as 300M. Price he quoted was around $500 for the shaft.
I think I'm growing on the idea of the Nissan swap. It handles upto 1000whp in a much heavier 370z with huge tires. It costs $500-700 used. I just have to work out its dimensions..
I think I'm growing on the idea of the Nissan swap. It handles upto 1000whp in a much heavier 370z with huge tires. It costs $500-700 used. I just have to work out its dimensions..
#21
The 350/370 transmission is cheap yes, mostly because the syncros are so much **** they only last a few weeks if u shift above 7k rpm, the gear ratios are good thou so maybe if you can get the synchros beefed up it would fit our rev loveing engines better :-), the 370z even has a rev matching function that heel-toes for you and the sychros still give up all the time.
The second problem is easier to adress, you need an oilcooler to the gearbox since they overheat in notime then used at higher revs...
But yes the axels and gears are good.......
And how do i know this? I have owned 2 of those 350z and 5 gearboxes split between them
The second problem is easier to adress, you need an oilcooler to the gearbox since they overheat in notime then used at higher revs...
But yes the axels and gears are good.......
And how do i know this? I have owned 2 of those 350z and 5 gearboxes split between them