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Old 10-26-2007, 12:26 AM   #1
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Default boost kills trannys fast huh.........?

well i just finish tunning it at 12psi on the dyno..... feels great so i leave the dyno and i say what the hell let see how it feels. punch it in first light them up throw second tires light up again for a lil then third for a lil then let off. do it a couple times and i start to drive normal and hit it again and second gear grinds like a champ and the gear box is starting to feel a lil notchy. so i guess my tranny let go......... ill look for another one and rebuild this one while it out. has anybody else toast trannys that fast i mean i just finish the boost set up and my first time pushin the tranny hard on boost....
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Old 10-26-2007, 12:29 AM   #2
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Not really.
Do you use your clutch?
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Old 10-26-2007, 12:29 AM   #3
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if your paranoid and have deep pockets get fm's tranny upgrade

i did however get a spare transmission just for that instance
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Old 10-26-2007, 12:42 AM   #4
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Originally Posted by cjernigan View Post
Not really.
Do you use your clutch?
LMAO!!!!:gay:
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Old 10-26-2007, 12:43 AM   #5
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Originally Posted by cjernigan View Post
Not really.
Do you use your clutch?
yea i use my clutch......
why would you think i dont use the clutch?
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Old 10-26-2007, 12:44 AM   #6
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Originally Posted by mike_671 View Post
LMAO!!!!:gay:
why was is so funny?
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Old 10-26-2007, 12:48 AM   #7
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i just read the thread or the question and when i reaad cjernigan post i just made me giggle
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Old 10-26-2007, 12:48 AM   #8
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yea i use my clutch......
why would you think i dont use the clutch?
you can shift without your clutch its posible.
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Old 10-26-2007, 12:51 AM   #9
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i know you can at a certain rpm sincro matches fine. but why risk it and not catch it and go about scratching your gear. i see no reason unless you have dog box. but anyways to answer the question i am shifting with the clutch......
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Old 10-26-2007, 12:59 AM   #10
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well it was probably going to let go soon anyways...the boost just exagerated a existing weak link......
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Old 10-26-2007, 01:02 AM   #11
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thats what im guessing also i was just wondering if anyone had a happen to them so fast.
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Old 10-26-2007, 01:13 AM   #12
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stop beating the **** out of it, that would help.
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Old 10-26-2007, 01:16 AM   #13
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Mechanical Empathy is definately needed on the 5 speed. The 5 speed isn't strong enough to hammer the shifts at that power level. The 6 speed is better, but the gearing sucks.
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Old 10-26-2007, 01:18 AM   #14
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Nah man, just giving you a hard time about it. I purposely don't make hard shifts from 1st to 2nd because i don't like spending money on things I don't have to. I much prefer the top speed in 2nd to the top speed in 1st anyway so it just makes sense to not destroy 1st so that I can get to 2nd faster anyway.
Maybe you can try starting it 2nd from now on. Corky recommends it, though i personally don't like it, even with my 4.30 rear.
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Old 10-26-2007, 02:39 AM   #15
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yea i do a lil drifting around the local events here so we tend to take off in first hard and slam second.... i guess ill try to get a low mileage tranny and see how it holds up......
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Old 10-26-2007, 09:45 AM   #16
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Quote:
Originally Posted by mazda/nissan View Post
if your paranoid and have deep pockets get fm's tranny upgrade

i did however get a spare transmission just for that instance
I had spur gears in my VW back in the day. Its so, so loud. Of course the strength is nice, but I was miserable driving it.


I have a ton of gear lash noise in my 150k mile tans...I should probably line up something newer...right?

How difficult is it to build these transmissions? I'd like to crack one open and send it out for cryo...I bet that will help significantly.
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Old 10-26-2007, 09:51 AM   #17
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i rag the **** out of mine.

how much torque do you have....if it's under 200 then you simply cant drive
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Old 10-26-2007, 10:12 AM   #18
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it happens, hows your motor mounts btw?
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Old 10-26-2007, 10:14 AM   #19
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how much torque can I put down, and expect to make it home from the track? I'm running r-comps now too.
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Old 10-26-2007, 10:17 AM   #20
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you can put town infinite torque, its a matter of the impact loading of the torque. IE dont drop the clutch artard
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