[Bfifty8]

Hey guys,
I was wondering if anyone's replaced the 2nd gear synchro and how much it costs? Cant seem to find a clear price on the forums. I know under warranty they just replace the whole tranny but I'm out of warranty so I was wondering the cost of anyone has done it before.
Ive tried changing the fluids but it didn't help so I guess it's the synchro
Thanks!!

[max_330i]

a) change trans fluid again and hope for the best
b) skip 2nd gear
or
c) transmission rebuild ($$$$$)

depending on how serious it is and how much it bothers you, the only real fixes are the rebuild or dumping the car for one with an unmolested gearbox. Sorry to break the bad news.

[STR8-6IX]

Originally Posted by max_330i

a) change trans fluid again and hope for the best
b) skip 2nd gear
or
c) transmission rebuild ($$$$$)

depending on how serious it is and how much it bothers you, the only real fixes are the rebuild or dumping the car for one with an unmolested gearbox. Sorry to break the bad news.

changing the fluid again isnt going to do anything.

second gear is somewhat important... you cant always just skip it.

I'm sure changing a synchro is fairly simple. its not a whole transmission rebuild...


OP, I apologize for not being of much help. I suggest you contact local transmission shops and figure out a price. that will be your best bet. doesnt have to be only indy's.

[max_330i]

Originally Posted by STR8-6IX

changing the fluid again isnt going to do anything.

second gear is somewhat important... you cant always just skip it.

I'm sure changing a synchro is fairly simple. its not a whole transmission rebuild...


OP, I apologize for not being of much help. I suggest you contact local transmission shops and figure out a price. that will be your best bet. doesnt have to be only indy's.

What do you mean its not a whole transmission rebuild? Do you know what it takes to replace a synchro? Literally taking the trans apart and putting it back together.

[STR8-6IX]

Originally Posted by max_330i

What do you mean its not a whole transmission rebuild? Do you know what it takes to replace a synchro? Literally taking the trans apart and putting it back together.

so do you want your second gear to just keep grinding? what other choice do you have? makes more sense to fix a perfectly good transmission vs replace the whole unit because of a worn synchro right?

also, raping it into second gear at redline everyday will wear a synchro must faster then it otherwise would have failed.

[max_330i]

Originally Posted by STR8-6IX

so do you want your second gear to just keep grinding? what other choice do you have? makes more sense to fix a perfectly good transmission vs replace the whole unit because of a worn synchro right?

also, raping it into second gear at redline everyday will wear a synchro must faster then it otherwise would have failed.

You don't have an E90, you don't drive a manual, and you have no idea what you're talking about.

OP-- disregard this guy. He's been trolling these forums for a long time and spouts a lot of nonsense. You will need a transmission rebuild to correctly and permanently fix your worn 2nd gear synchro... there is no way to "fix" a "perfectly good transmission" without removing the unit and some amount of disassembly.

[hassmaschine]

probably cheapest to just swap in a different 6mt. They don't go for a whole lot on their own, and labor would be similar to doing a clutch replacement (which you could do while you have it apart). You have to R&R the trans to replace the synchro anyway.

Are you sure the synchro is bad though? Could it be something simple like a shifter rebuild?

[RileyZ]

Had the same problem. Dealer replaced with a brand new 6mt as bmw doesn't rebuild them. Look for a local bmw specialist to ask about rebuild cost

[floydarogers]

Originally Posted by Joego123

Hey guys,
I was wondering if anyone's replaced the 2nd gear synchro and how much it costs? Cant seem to find a clear price on the forums. I know under warranty they just replace the whole tranny but I'm out of warranty so I was wondering the cost of anyone has done it before.
Ive tried changing the fluids but it didn't help so I guess it's the synchro
Thanks!!

There is a very recent thread on 2nd gear and this problem. Not sure it was here in e90post, on f30post, or on bimmerfest. Search should turn it up.

[Bfifty8]

Originally Posted by hassmaschine

probably cheapest to just swap in a different 6mt. They don't go for a whole lot on their own, and labor would be similar to doing a clutch replacement (which you could do while you have it apart). You have to R&R the trans to replace the synchro anyway.

Are you sure the synchro is bad though? Could it be something simple like a shifter rebuild?

Im not exactly sure actually is here a way to check if its a shifter?

[Antetokounmpo]

Originally Posted by max_330i

You don't have an E90, you don't drive a manual, and you have no idea what you're talking about.

OP-- disregard this guy. He's been trolling these forums for a long time and spouts a lot of nonsense. You will need a transmission rebuild to correctly and permanently fix your worn 2nd gear synchro... there is no way to "fix" a "perfectly good transmission" without removing the unit and some amount of disassembly.

+1

[08njSTEP]

I've done a few manuals. You should be friendly with a machine shop as there will likely be some pressed on parts that require special fixtures. The nice thing is they only go together 1 way and you can check if it's right before install.

This is not a novice job. You need to be pretty experienced in repairing gear driven devices. And you DO have to take the entire transmission apart. The parts are probably cheap, but may be hard to locate.

Good luck OP, you have a task ahead.

[weehe126]

It's been covered a few times on the other forums, not sure about on here. There are no rebuild kits and you can not buy a new syncro. The only option is to get a new or used trans and hope it doesn't have the same problem.

[tlow98]

Originally Posted by STR8-6IX

changing the fluid again isnt going to do anything.

second gear is somewhat important... you cant always just skip it.

I'm sure changing a synchro is fairly simple. its not a whole transmission rebuild...


OP, I apologize for not being of much help. I suggest you contact local transmission shops and figure out a price. that will be your best bet. doesnt have to be only indy's.

Why not just google where the synchro is located within a transmission before you post in here?

If you did then you wouldn't need to apologize for blabbing about the stars and the moon and the first time you raced with no air filter and how some girl got wet and it smelled funny.

[Bfifty8]

Thanks for the input guys! Not quite sure which way to go about it as of right now

[hassmaschine]

Originally Posted by Joego123

Im not exactly sure actually is here a way to check if its a shifter?

the way to tell would be to rebuild the linkage. Sometimes a sloppy shifter will have difficulty going into gear. If it works you've got a nice shifter, if it doesn't then you still have a transmission to replace.

[doru]

Originally Posted by hassmaschine

the way to tell would be to rebuild the linkage. Sometimes a sloppy shifter will have difficulty going into gear. If it works you've got a nice shifter, if it doesn't then you still have a transmission to replace.

This.
My son's e46 started developing play/noise in 2nd & 3d. At first we thought transmission rebuild. Turned out a relative easy linkage rebuild. Here is a DIY for the e46, but I'm quite positive it's similar with the e90. You don't have to change the shifter per se, but if you want a short shifter, then maybe now it's the time. The most difficult part of the job is to drop the exhaust. Also, as a note, the parts involved are not expensive at all, and I would do that first. You could also check with a reputable indy specialized in BMW's to give you a correct assessment.

P.S.: basically all the parts are listed - you need to identify the correct p/n for your car.

GL and keep us posted

[Antetokounmpo]

Originally Posted by tlow98

Why not just google where the synchro is located within a transmission before you post in here?

If you did then you wouldn't need to apologize for blabbing about the stars and the moon and the first time you raced with no air filter and how some girl got wet and it smelled funny.

His 'rep' should speak for itself though Some gold from him below.

Coilovers. Don't do lowering springs. I recommend koni/bilstein sport with ACS/eibach springs

I've added enough input on these forums and my reputation points speak for themselves. I spend most of my time on the e90 section because I have an N52 engine.

ask anyone who knows their suspension if bilstein struts with ACS springs are a good setup.. because they are.

[tlow98]

Originally Posted by Harambe

His 'rep' should speak for itself though Some gold from him below.

I love it. Ask anyone that knows me and they'll I love someone that's full of sh*t.

[Volasko]

I agree with the above statements that there isn't such a thing as a quick and easy transmission fix. Nothing about working on a transmission is easy. My buddy had an E92 335xi transmission lose reverse gear, he went the repair route and ended up with a bill for nearly $7000k (now he did replace the clutch while in there) but authorized the work from a generic verbal quote of around $2000 + parts. When the dust settled everything worked great again but was naturally pissed as he could have got a new transmission for nearly the same amount.

[Bluewater328iT]

Originally Posted by doru

This.
My son's e46 started developing play/noise in 2nd & 3d. At first we thought transmission rebuild. Turned out a relative easy linkage rebuild. Here is a DIY for the e46, but I'm quite positive it's similar with the e90. You don't have to change the shifter per se, but if you want a short shifter, then maybe now it's the time. The most difficult part of the job is to drop the exhaust. Also, as a note, the parts involved are not expensive at all, and I would do that first. You could also check with a reputable indy specialized in BMW's to give you a correct assessment.

P.S.: basically all the parts are listed - you need to identify the correct p/n for your car.

GL and keep us posted

I'd try the short shifter or new/rebuild shifter before spending more on the tranny.

[Bfifty8]

Any of you guys know where to pick up used transmissions other than eBay?