fromthesun_93

I have a problem on my '95 GSR Tranny. When i'm shifting from 2nd to 3rd, i can feel the synchro's grinding on each other.

I've done some research and it seems like most people have had this problem.

Should i just rebuilt the tranny or buy a new one?

sfar785

Integra tranny's have the infamous 2nd to 3rd grind, only way to fix it is to replace your synchro's which can be costly if you can't do it yourself. Honestly, even if you DO buy another tranny you're just gonna have the same problem shortly after anyway. Do yourself a favor and run some Honda MTF (or Synchromesh) and just use what you got, you'll be fine.

BryanM.

iTrader: (1)

Really common for B series trannys to grind.

Mine has been grinding for YEARS and hasn't really gotten any worse.

Hidenplanvew

its pretty easy to rebuild aswell... It takes me about 2 hours to rebuild a trans and sometimes I like to change gears or finnal drives out.. If you do it your self try and replace a few of the bearings aswell

Best tools I have for it is a nice set of snap ring tools and a 3 arm gear puller... but dont forget the hondabonda around the transmission 1/2s

sfar785

hell, if i had to rebuild a GSR tranny myself i would throw an LS 5th gear in it whle i'm at it. I know my 4-5th syncro just started to get a little grind to it the last few weeks...although it's only at high RPM's, so i won't complain.

fromthesun_93

What's so good about the LS 5th gear?

So basically the best thing to do is to just re-service the tranny with some new fluid?

sfar785

LS 5th gear is longer, which means lower RPM's and better mpg

Mashimaro

iTrader: (1)

Replacing the worn synchro would be a good idea so that you know you have a good trans.

I personally wouldn't do the LS 5th as the drop from 4-5 is too much.

Guess it depends what you want to build your car for. An LSD is a good idea while it's all out if you feel the need for one

sfar785

with an LS 5th gear the drop from 4th isn't bad...my buddy has his trans set up that way in his GSR tranny and it's great....even better for boost as well

fromthesun_93

So for example if i'm going lets say 80 mph at 3 1/2 RPM in 5th, with an LS 5th gear it'll drop down to?..

sfar785

probably around 2500

fromthesun_93

ill probably change the syncros on 3rd and get that ls 5th.

anyone that retails this stuff?

sfar785

just google it i guess, or get OEM Honda parts from eBay or the stealership

donut.

If you don't know, just say you don't know instead of giving out wrong information.

Cruising at 80mph with a gsr transmission and stock tire size, you should be around 3800 rpm. With the LS 5th gear, you'll be around 3400 rpm. That's a 400 rpm difference. Less gas? I think not.

sfar785

my bad, i read 60mph....and i was basing my answer off this thread https://honda-tech.com/forums/acura-integra-type-r-8/alternative-b-series-tranny-philosophy-integra-ls-5th-gear-1863454/ when i thought i read 60mph. He's reading 3600 RPM's at 80mph....60mph would be between 2500-2700 RPM's

Hidenplanvew

alot of the change in rpms in a gear would be based on diameter of input shaft gear and also main shaft gear. What can also adjust Rpm would be to change out final drive gear ratio as well...

So if you plan to replace your 5th gear, your going to need the gear for the input shaft and also the gear for the main shaft. You have to use the corresponding gear as there is a clearance the that 2 shafts use inside the housing. You could also change the final drive gear and that will change all your gear ratios for all the gears, making them alittle longer. You would have to just check clearances for the diff and use the correct shim fr clearance. Its really is easy once you take it apart and I would say to get a Helms or something just for clearances and location of parts.

I built a custom Hx trans with a SI main shaft (D series) and finnal drive... it was perfect for boost as it had the steel shift forks and great gear ratios.

EJ1OverSpool

teammfactory.com is a good place to look...the synchro sets are pretty cheap(from synchrotech) and are pretty easy to switch out. 2nd to 3rd grind is pretty common but its not a big deal.

Gearspeed-Performance

iTrader: (1)

I think you mean Countershaft and Mainshaft(Input shaft). Mainshaft(Input shaft) is the shaft that goes into the clutch disk. The Countershaft is the shaft that rides on the Ring Gear. So much terminolgy in the transmission industry! LOL

I wouldn't recommend changing the final drive any lower than a 4.40 as that will drastically affect the acceleration speed throughout your gear range.

As for the grind. It is going to be more than a synchro. Typically it is the 3-4 Slider assembly and often times the 3rd gear as well. Just about every Vtec B-Series transmission that comes through the door needs a 3rd gear. While you have the transmission open its a good idea to inspect it thoroughly, replace bearings, seals and possibly upgrade to carbon synchros if its in the budget.