gunslinger Posted March 21, 2005 Share Posted March 21, 2005 ive got the LSD, but do i need to grab the turbo trans?? the LSD is a 3.7 and my battle wagon is a 3.9. all the turbo's ive found are full time 4x4. ive thought about converting the full time to the DR by punching out a few plugs and such but im not sure. anybody know anything about if the ratios matter that much from 3.7 to 3.9?? Link to comment Share on other sites More sharing options...
Ross Posted March 21, 2005 Share Posted March 21, 2005 Yeah, i think that would cause some pretty major binding when in 4wd. Definitely get the trans as well. Link to comment Share on other sites More sharing options...
northguy Posted March 21, 2005 Share Posted March 21, 2005 You could use your 3.9 tranny and just do the swap with the internals of the 3.7 and your existing 3.9 differential. There is an excellent write up in the USRM (I think it was Turbone who wrote it - please excuse me if I gave credit to the wrong author). If you switch transmissions you might have to look at different driveshafts also. So, if you're grabbing one thing you might as well grab it all. Be aware that tranny change mat require a clutch/flywheel change also. So grab that too. Link to comment Share on other sites More sharing options...
Craven Posted March 21, 2005 Share Posted March 21, 2005 You could use your 3.9 tranny and just do the swap with the internals of the 3.7 and your existing 3.9 differential. There is an excellent write up in the USRM (I think it was Turbone who wrote it - please excuse me if I gave credit to the wrong author). If you switch transmissions you might have to look at different driveshafts also. So, if you're grabbing one thing you might as well grab it all. Be aware that tranny change mat require a clutch/flywheel change also. So grab that too.It is listed by McBrat but it has Qman's name on it. http://www.ultimatesubaru.org/forum/article.php?a=36 Link to comment Share on other sites More sharing options...
northguy Posted March 22, 2005 Share Posted March 22, 2005 Thanks for the correction. Hate to not credit the correct source. Link to comment Share on other sites More sharing options...
Qman Posted March 22, 2005 Share Posted March 22, 2005 Yeah, i think that would cause some pretty major binding when in 4wd. Definitely get the trans as well. If you install a turbo trans in place of a non-turbo you will be deeply dissappointed. Do the diff swap as stated in the USRM. I have done it a dozen times and it pays off. Link to comment Share on other sites More sharing options...
gunslinger Posted March 23, 2005 Author Share Posted March 23, 2005 If you install a turbo trans in place of a non-turbo you will be deeply dissappointed. Do the diff swap as stated in the USRM. I have done it a dozen times and it pays off. aside from the trans being an all wheel/full time four wheel drive tranny, are there any other reasons why i would be dissappointed?? i thought the turbo tranny's were stronger...... i dont really want to change the tranny out so this should help a load. i think i might change out the gears this week since the motor's out of the battle wagon and all. Link to comment Share on other sites More sharing options...
stngllhm Posted March 23, 2005 Share Posted March 23, 2005 well if you put a turbo trans in you will need diffrent cv stafts. but i think Qman was refering more to the fact you will go from a 3.9 ratio to a 3.7 ratio Link to comment Share on other sites More sharing options...
Qman Posted March 24, 2005 Share Posted March 24, 2005 Yep! Link to comment Share on other sites More sharing options...
gunslinger Posted March 29, 2005 Author Share Posted March 29, 2005 Yep! got it guys, thanks. Link to comment Share on other sites More sharing options...
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