# b16 tranny with ls 4th & 5th? **URL:** \ **Category:** Stock Engine-Bay Components\ **Created:** [May 2, 2013, 5:32pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518 "2013-05-02T17:32:37Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![jdmda9integra](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/j/6bbea6/32.png) [@jdmda9integra](https://forum.g2ic.com/u/jdmda9integra)\ **Post date:** [May 2, 2013, 5:32pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/1 "2013-05-02T17:32:37Z")
Well i bought a b16 tranny and 4th gear dont work i still have my LS tranny and was thinking of switching out the 4th & 5th from the LS one to the b16. Would this be a good combo on just a all motor LS . So b16 1st-3rd and LS 4th & 5th ---
**Author:** ![Cali.S](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/c/c5a1d2/32.png) [@Cali.S](https://forum.g2ic.com/u/Cali.S)\ **Post date:** [May 2, 2013, 6:13pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/2 "2013-05-02T18:13:22Z")
Why do you want to put ls 4th gear? ive heard of people doing just ls 5th gear in a b16 tranny but not 4th and 5th ---
**Author:** ![da9bigboi](https://forum.g2ic.com/user_avatar/forum.g2ic.com/da9bigboi/32/133_2.png) [@da9bigboi](https://forum.g2ic.com/u/da9bigboi)\ **Post date:** [May 2, 2013, 7:43pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/3 "2013-05-02T19:43:27Z")
I read a post where someone put Ls 4th and 5th in a b16 trans and was completely rebuilt. Dude said it was the best thing he ever done. ---
**Author:** ![da9bigboi](https://forum.g2ic.com/user_avatar/forum.g2ic.com/da9bigboi/32/133_2.png) [@da9bigboi](https://forum.g2ic.com/u/da9bigboi)\ **Post date:** [May 2, 2013, 7:44pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/4 "2013-05-02T19:44:23Z")
That was for daily driving though. I wouldn’t consider it for racing status. ---
**Author:** ![jdmda9integra](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/j/6bbea6/32.png) [@jdmda9integra](https://forum.g2ic.com/u/jdmda9integra)\ **Post date:** [May 2, 2013, 7:58pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/5 "2013-05-02T19:58:31Z")
Because my 4th gear dont work ---
**Author:** ![integra\_hot](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/i/ecc23a/32.png) [@integra\_hot](https://forum.g2ic.com/u/integra_hot)\ **Post date:** [May 2, 2013, 8:41pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/6 "2013-05-02T20:41:10Z")
do it, why not…get that MPG back…although i only lost about 2-3mpg ---
**Author:** ![da6YO](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/d/df705f/32.png) [@da6YO](https://forum.g2ic.com/u/da6YO)\ **Post date:** [May 2, 2013, 11:05pm UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/7 "2013-05-02T23:05:48Z")
Nothing to lose if it doesnt work to begin with. ---
**Author:** ![Colin](https://forum.g2ic.com/user_avatar/forum.g2ic.com/colin/32/16_2.png) [@Colin](https://forum.g2ic.com/u/Colin)\ **Post date:** [May 3, 2013, 12:14am UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/8 "2013-05-03T00:14:48Z")
All these posts and not even mention of the fact that what he’s trying to do might not even be possible. Not all transmission internals can swap, and without knowing WHICH “b16a” trans and WHICH “ls” trans he’s talking about all this talk is a waste of time. ---
**Author:** ![TurboG2teg311](https://forum.g2ic.com/letter_avatar_proxy/v4/letter/t/bb73d2/32.png) [@TurboG2teg311](https://forum.g2ic.com/u/TurboG2teg311)\ **Post date:** [May 3, 2013, 12:41am UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/9 "2013-05-03T00:41:27Z")
I have an 92 XSi transmission with an LS 5th in my car now, I installed it years ago when I rebuilt the transmission. It works excellent for long trips and cruising on the highway. But it is a pretty drastic change in rpm in the 4-5 shift. Keep in mind that if you have a 88-91 B16 transmission you must use a 90-91 integra LS 5th gear set. And if you have a 92+ transmission you must use 92+ 5th gear set. Access to a press is a must, and I would not attempt it without a helms manual. As far as you wanting to change 4th and 5th that would be a total waste. The performance drop would be significant enough to not even bother with spending the time and money to swap the gears. ---
**Author:** ![Colin](https://forum.g2ic.com/user_avatar/forum.g2ic.com/colin/32/16_2.png) [@Colin](https://forum.g2ic.com/u/Colin)\ **Post date:** [May 3, 2013, 5:12am UTC](https://forum.g2ic.com/t/b16-tranny-with-ls-4th-5th/98518/10 "2013-05-03T05:12:55Z")
^Now there’s a useful post!