lol slow Posted May 22, 2012 Share Posted May 22, 2012 My transmission went out about a month ago, so I took it to a pretty well known shop here called Atlas Transmission, my dad knows the owner and said he can hook me up. So they pick my car up, fix it over a weekend and I pick it up Monday. First day having it back right away I noticed issues with the RPM not matching with gearing, like it use to. Basically when in 5th gear, at 60mph my rpms would sit at 3k, before it would be exactly at 2.5k. Finally, yesterday I had a short day at work and wasn't busy, so I went back up to see what went wrong, I thought maybe they put gears from like an outback 5mt in, after talking to the owner, he told me he "upgraded" me to STRAIGHT CUT gears, he told me the down fall is the rpms will be higher, but the transmission will be A LOT more reliable. I don't know to much about straight cut gears, but I've heard they can take a nice beating, but what sucks it one of the gears they replaced with a straight cut it 5th gear...IT SUCKS for high way cruising, I also believe they changed 4th and 3rd as well. If you were in my shoes, would you ask for them to re-do it with oem gears or should I keep it and look at it as a positive thing? Link to comment Share on other sites More sharing options...
WhiskeyTango Posted May 22, 2012 Share Posted May 22, 2012 Stop shitting myself. No really I would want it changed out. Link to comment Share on other sites More sharing options...
W.K.S. Posted May 22, 2012 Share Posted May 22, 2012 You're not tracking it, so RPM's matter. Change it back. For me personally I'd have them change it back because you dont **** with my car, unless I say you can **** with my car. Link to comment Share on other sites More sharing options...
lol slow Posted May 22, 2012 Author Share Posted May 22, 2012 I just did some research and when you're running straight cut gears, it makes a whining sound, on top of that since they aren't SYNcro I'd have a hard time shifting in less rev matched, my trans no matter was gear does not make any loud noise and goes into every gear fine. Honestly, he probably bull shitted me. I don't have time or money to mess around, I might look into trading it in. Link to comment Share on other sites More sharing options...
scoobyscoodle Posted May 22, 2012 Share Posted May 22, 2012 Helical gears are stronger than straight cut gears, if both gears are the same size. I don't see why he would use straight cut gears in your application unless you were dealing with a very high level of torque. It's also not necessarily true that straight cut are more reliable or longer lasting. In fact, in most applications I would tend to say the opposite. Link to comment Share on other sites More sharing options...
halwith Posted June 8, 2012 Share Posted June 8, 2012 the real difference between helical and spur gears is side loading and noise. helical gears induce a sideload when under torque but are quieter. spur gears are louder but dont induce the sideload. comparing on cars101 2006 outback xt Manual 5spd 1- 3.166 2- 1.882 3- 1.296 4- 0.972 5- 0.738 final 4.444 gt/ gtspecb manual 5spd 1st 3.166 2nd 1.882 3rd 1.296 4th .972 5th .738 final reduction 4.111 outback 2.5i Manual 5spd 1- 3.454 2- 2.062 3- 1.448 4- 1.088 5- 0.871 final 4.111 legacy2.5i 5spd manual 1st 3.454 2nd 2.062 3rd 1.448 4th 1.088 5th .780 final 3.90 im not sure of the interchangeability of these units. good luck Link to comment Share on other sites More sharing options...
lol slow Posted June 8, 2012 Author Share Posted June 8, 2012 Yeah I got raped, end of story. Thank you for the ratio's between the cars though, that helps! Straight cuts would clearly wine and be loud as hell, my transmission is like before, noise wise. I'm saving for a beater Civic or even old ass Impreza, when I get one I will be taking my car back to get properly rebuilt, then I will be looking into an 06-07 STI trans from a junkyard, or my buddy gets cheap things since he is in the repair business. We found an 06 STI trans for $2500, with 100k mile warranty from the shop selling it...wish I had the money, Link to comment Share on other sites More sharing options...
BDII Posted June 8, 2012 Share Posted June 8, 2012 an 06 STi tranny will put you at the same RPM range, if not higher, than the one you have. The 6th gear is not a "highway gear" The best MPG you could hope for with an 06 6speed is 25mpg. Trade the built tranny you have for a stock one with someone on the forum. Need forum help? Private Message legGTLT Link to comment Share on other sites More sharing options...
lol slow Posted June 9, 2012 Author Share Posted June 9, 2012 My transmission isn't built, that's the problem. I was lied to, the gears that broke in mine were most likely replaced with gears off an Outback, not straight cut. Straight cuts would whine, quite loud, also would be hard to put into that gear in less rev matched. I want an STI transmission because it's much stronger, and from what my friend Mike said his 611whp STI was the strongest with an 06 STI trans. Link to comment Share on other sites More sharing options...
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