Hey HT.
I have 99 b16 tranny that has a craked housing were the diff is cuzz some smartass left a bolt in there after assembling it and it got stuck in beetween the diff and the tranny housing and craked it otherwise the gears are good. Im wondering will the b16 tranny internals fit into 94 gsr tranny with out any problems. Like the main shaft and the countershaft. Will i have to change the shifter selectors or the fork things.
Thanks

 

Bump....some one has to know this....

 

as long as u swap everything from the b16 case to the gsr case u will be fine. dont mix the halves of the cases, keep the b16 with the b16 and gsr with the gsr.
ive done it dozens of times. the cases as far as i can tell are identical unless u have a lsd, then some oil fins are modified.

 

OK so swap over the shifter selector mechanism..forks......im planing on leaving the stock gsr diff inn there and just runing a gsr tranny with b16 internals. Now can you tell me what diference would it make to run a LS tranny with gsr gears...? Would it be the same or would the final drive be diferent. Thanks

 

u can re use the gsr shifter and forks, but personally i like to keep all the same stuff together due to any wear pattenrs they could have. But the gsr diff should work fine with the b16 mani and counter shaft, they are both a 4.4 final drive. now if u wann use ls final drive its a 4.26 to u will need the correct countershaft with it, if u use a b16/gsr one you will destroy the teeth on it. so if u ran an ls tranny with gsr 1-5 ud have a qicker shifting ls. also if possbile use sealed bearings on the diff, the tapered ones suck imo.

 

Sweettt.

And i got a lill caried away. You said that if i run gsr main and counter shafts in a ls tranny. It would be perfectly fine.
Thanks

 

match the counter shat to fine final drive ring gear. the main shaft makes no difference.

 

correct^ countershaft and ring gear have to be matched. you can use the forks from the gsr, the counter and mainshaft assemblies and just drop them in. do not forget to use the 2 washers for the main shaft. smaller under bigger. hell, you could swap over the entire diff to save you time for having to swap over the ring gear

 

Thanks

 

Everything will switch over. But...

Use the GSR countershaft and put all of the B16 countershaft parts on it. This will ensure you don't have issues with the countershaft and ring gear being mixed. Do not mix the B16 countershaft you have with the GSR ring gear on the diff! Would be nice if you could just swap ring gears, but the GSR/ITR are not interchangeable with the B16/LS.

And you'll want to check shimming on the mainshaft since you'll be changing casings/mainshaft. This is another important step that will ensure the longevity of the trans.

Other than that, you can use whichever shift forks and shift change assemblies you want to, but I'd keep all of the pairing of them together like has been mentioned, just for wear patterns sake. But you probably won't run into issues if you happen to mix them up.

 

Ok, read this thread and its exactly what I was looking for. I'm a totally transmission illiterate but so my question may have already been answered in here but i'm gonna go ahead an ask anyway lol. I have my entire b16 gearset and a gsr trans case. If going aftermarket with the diff and final drive, which trans would I want to get them for? Is there any other beneficial hybridizing that could be done with this setup? Planning on a 4.9 FD so maybe gsr 4th/5th for lower highway cruising?

 

Not to steal away from the OP, but i have a quick question.

Im looking to make my b16 trans more commuter friendly, thus being said, would it be as easy as swapping in the ls 5th gears, or will the ring gears have to be swapped too?

 

Dam to much knowledge lol. Im a trannie noob to butt ive taken apart my gsr tranny and put it togheter a few times. Ok from what im getting. Youre saying to take all the gears of the gsr counter shaft and putt it on the b16 one. Thats alot of work imo. Heres the deal. i have a gsr tranie that has 3 ground of teeth on the final drive. My friend has a b16 tranny that has a craked casing. He bough another gsr tranny to replace it. So what we want to do is use the b16 gears and slap them into his gsr tranny. Then ima buy/trade parts for his gsr trannie internals and put them into my mest up gsr tranny. Or i would really liike to putt the gsr tranny internals into a 97 ls tranny i have.
Thanks

 

No. I said put the B16 countershaft gears, bearings, etc. on the GSR countershaft that is paired with its GSR ring gear. Well, the bearings aren't that important, but make sure the B16 gears make it on, and use whichever 1-2 shifter sleeve/hub/synchro is best from either transmission.

And it's not much work... it certainly won't take more than 30 minutes unless you get confused or lost. Just make sure you keep everything in the correct order and orientation. Google the term "asperities" and research them in regards to gear teeth and you'll see why you shouldn't interchange mated sets of gears and why this is a step you shouldn't shortcut.

Yes. Will swap right in. Just need the countershaft and mainshaft gear.

It won't matter as long as you purchase the final drive and diff for the same transmission. The B16 and GSR diffs are different, so the GSR/ITR ring gear won't fit a B16/LS diff, and vice versa.

 

it is my belief that the gsr tranmission is actually stronger than the b16 trans due to different snychros. i forgot whats its called its a double something. so if there is a chance to use one or the other i vote gsr. but most like the gear ratio of the b16 so im sure ill get some resistance on this... lol

 

92-01 GSR and 94-00 B16 transmissions share identical synchronizers. 1st, 3rd, 4th, 5th are all single cone and 2nd is a dual-cone.

The only differences between the transmissions are gear ratios, differential bearings in some models, and differential housings (92-93 GSR uses the B16 diff though). That's it.

 

b 16's run the dual cone? i thought it was just gsr's.... ok