Winesalot Posted November 26, 2017 Share Posted November 26, 2017 I am looking to pick up a replacement 5MT transmission for my son's 1996. I was looking at the transmission page on this site ( http://legacygt.com/forums/showpost.php?p=3555574&postcount=3 ) and noticed that there is a gear ratio exception for the 96's. (Of course there is, lol) Will we notice a big difference if we put in a trans from another year with the different gear ratios? Link to comment Share on other sites More sharing options...
Brighton96 Posted November 26, 2017 Share Posted November 26, 2017 Just replace the matching rear diff with the one from the 5mt donor and use that donors ECU and you should be fine. Matching the final gear ratio is the most important part, the diffs have to be the same, and if you don't know what gear ratios your 96 has, it's safer just to swap both trans and diff from the donor. Link to comment Share on other sites More sharing options...
doublechaz Posted November 27, 2017 Share Posted November 27, 2017 When I had to do the same, with the same possible options, I jacked up the back end, both wheels off the ground. A chalk mark on each tire and the driveshaft. Then turn the driveshaft by hand 40 revs and count how many turns at the wheels. It was real easy to tell if I had a 3.90 or 4.11 rear end. Then I got the matching (3.90) 5MT. I've got about 35k on since then. A good deal less expense and work than swapping out the rear end. Link to comment Share on other sites More sharing options...
RustyRuu Posted November 27, 2017 Share Posted November 27, 2017 also be sure to keep the old one around for parts the 96' impreza has a cable clutch so you may need to swap hardware around if you get a tranny that was not cable also. Link to comment Share on other sites More sharing options...
Setnev Posted November 27, 2017 Share Posted November 27, 2017 ECU swap isn't necessary. As I learned, it's not the ECU that determines the transmission type, it's the harness that tells the ECU which transmission is installed. Read this thread here: http://legacygt.com/forums/showthread.php/mt-identifier-pin-136832.html As far as the matching transmission, your 96 with the auto is not hard to determine what your final drive ration is. If it's a Brighton or L AWD, it has a 4.111 FD on the transmission, which is not hard to find a 5MT to match that. Most newer Subaru 5-speeds in the early to mid-2000's were 4.11 and all you need to do is swap your speed sensors. The FWD Brighton and L model had 3.90 final drive and the fact that it's a FWD means no rear diff anyways. If it's an Outback or GT, those have 4.444 FD. Only a JDM WRX 5MT, or 04-05 Forester XT 5MT, use that ratio. The only exception the link says is regarding the FWD 5MT. There was no rear diff, for obvious reasons, so the FD gear ratio is naturally lower. Just because the 96 was special, just meant that Subaru still had FWD in that year. Regardless the exception does not apply to you swapping the transmissions, since I assume you have AWD and want to retain it. Refer to this chart here specifically the last two pages for USDM 5MTs. Try to stay away from a WRX transmission unless you can get the matching rear diff. Link to comment Share on other sites More sharing options...
Winesalot Posted December 4, 2017 Author Share Posted December 4, 2017 Thanks for all the advice. Since I am 3 hours away from his car I am going to have him get the popping out of gear diagnosed at a transmission shop or the dealer and once we know what's up we'll proceed with the shopping for transmissions. Link to comment Share on other sites More sharing options...
Winesalot Posted December 14, 2017 Author Share Posted December 14, 2017 I finally spent some time under his car and, of course, we have the 96 exception transmission with 4th having a 1.088 dear ratio and the rear diff is a 3.90 ( car is a 96 Impreza awd ). Apparently this is going to limit the potential donor pool. Any idea if there are other cars that use the 5mt with the highlighted gear ratio? 5MT Used in pretty much all Subarus from 1995 - 2002 including the WRX) 1st : 3.785 2nd : 1.945 3rd : 1.500 4th : 0.994 5th : 0.780 - 0.735 WRX Final Drive : 4.11 - 3.90 WRX 1996 Exception 1st : 3.545 2nd : 2.111 3rd : 1.448 4th : 1.088 5th : 0.825 (FWD) - 0.780 (AWD) - 0.871 (Outback AWD) Final Drive : 3.454 (FWD) - 3.900 (AWD) - 4.111 (Outback AWD) Link to comment Share on other sites More sharing options...
Infosecdad Posted December 14, 2017 Share Posted December 14, 2017 You need the chart of Subaru transmissions... https://www.rallispec.com/downloads/Transmission%20ID%20Chart_Public.pdf Link to comment Share on other sites More sharing options...
doublechaz Posted December 15, 2017 Share Posted December 15, 2017 My 95 wagon with L trim has the 3.90 final drive. I'm not sure about the ratios on the forward gears. My original bell housing marks were 87-TY752VAAAA I think the number on it now is TY752VAABA, but I'm not 100% sure of that. Link to comment Share on other sites More sharing options...
Winesalot Posted December 15, 2017 Author Share Posted December 15, 2017 You need the chart of Subaru transmissions... https://www.rallispec.com/downloads/Transmission%20ID%20Chart_Public.pdf Thank you so much for this transmission chart. This makes shopping easy. Link to comment Share on other sites More sharing options...
Setnev Posted December 17, 2017 Share Posted December 17, 2017 I finally spent some time under his car and, of course, we have the 96 exception transmission with 4th having a 1.088 dear ratio and the rear diff is a 3.90 ( car is a 96 Impreza awd ). Apparently this is going to limit the potential donor pool. Any idea if there are other cars that use the 5mt with the highlighted gear ratio? 3.90 gears were used in the 90-98 Legacy Brighton and L with the 5MT. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.