MysteriousXTC Posted August 30, 2008 Share Posted August 30, 2008 I am about to purchase an '87 GL-10 that is for the most part perfect inside and out for a 20+ y/o car. It is has an EA82T with a 4spd auto tranny. From what I am reading this is a full time 4wd car, correct me if I am wrong. It will not engage reverse, thus only has forward gears, that do work and drive nicely. My goal is to remove the D/R 5spd that I have in my 89 GL wagon and swap it into the GL-10. The 89 GL is basically a scrap parts car now so I am sure I have the majority of what I will need and I have several salvage yards close by at my disposal. So now onto my questions... From what I understand splines on the transmission ar different from the turbo/no-turbo cars, thus I would need the non turbo front axles or would the turbo axles infact work? Iis it possible to swap the axle stubs between the two transmissions? From what I understand the GL-10 is just a luxury package and there wouldn't be a differnce other than accessories between a GL's and GL-10's... Thus, is there a difference in the final drives between nonturbo and turbo or auto and manual? And is there any actual difference in the drivesafts? spline count, length, etc.. I figure so long as I can get the manual swapped in and have the front axles correct, I can just drive around in FWD until I get everything figured out with the rear. I dont see any concievable issues with this, am I wrong? The GL-10 has the digigage. Is there any difference in the speedo cables or anything else that I should be concerned with? I am sure I will have more questions to come but I figured I would start with this and see what feedback I get... Feels good to know I will be back into an EA82 scoob ... Thanks in advace... -caleb Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 31, 2008 Share Posted August 31, 2008 The 4EAT probably has a 3.9 rear diff. But check and see. If not you will also need the rear diff from the donor. The axles will have to be changed. No way around it. The MT is 23 spline and the turbo axles are 25 spline. The stubs are not removable from the MT so you must use the non-turbo axles. Speedo still uses a cable. If the 4EAT cable isn't long enough you will have to use the MT cable from the donor. It will work fine with the cluster. Everything else should bolt straight up. You will have to jumper the nuetral start inhibitor switch pins on the old 4EAT shifter wireing harness. Should be pretty simple to figure out with a DMM and your ignition key. You can't drive around in FWD without losing all your transmission fluid. The driveline has to be in place in order to seal the rear output of the transaxle - just like any other RWD transmission. GD Link to comment Share on other sites More sharing options...
MysteriousXTC Posted August 31, 2008 Author Share Posted August 31, 2008 The 4EAT probably has a 3.9 rear diff. But check and see. If not you will also need the rear diff from the donor. The axles will have to be changed. No way around it. The MT is 23 spline and the turbo axles are 25 spline. The stubs are not removable from the MT so you must use the non-turbo axles. Speedo still uses a cable. If the 4EAT cable isn't long enough you will have to use the MT cable from the donor. It will work fine with the cluster. Everything else should bolt straight up. You will have to jumper the nuetral start inhibitor switch pins on the old 4EAT shifter wireing harness. Should be pretty simple to figure out with a DMM and your ignition key. You can't drive around in FWD without losing all your transmission fluid. The driveline has to be in place in order to seal the rear output of the transaxle - just like any other RWD transmission. GD thanks for the info... I dont have a rear diff,axles or driveshafts from the donor car... So as long as teh drive shaft from the auto GL10 will work I can still bolt everything up and run FWD, just being careful never to put it in 4wd... I will run the numbers on the trannies to find out what FD they are but does anyone have any assumptions as to what final drive might be in the auto and in the manual trannies? Link to comment Share on other sites More sharing options...
idosubaru Posted August 31, 2008 Share Posted August 31, 2008 only the front half of the driveshaft (driveshaft is two pieces) needs to be in place to keep fluid from leaking out, so install that and you're golden to run it FWD. the driveshafts are two piece - the front halves are different manual to auto and the rear halves are identical (interchangeable). so you'll need the front half from a manual trans vehicle. as for the axles, just use axles from whichever trans you're running, you have both parts cars? i'd reboot whatever you install, particularly if it's from any axle that has been sitting unused for awhile. most i've tried to install start to crack or loose grease in less than a year. not worth my time, i just reboot them now. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 31, 2008 Share Posted August 31, 2008 Yes - you will need the driveshaft from a MT. The transmissions are different overall length's and the front section is different to compensate. A standard non-turbo 5 MT D/R would almost certainly have a FD of 3.9:1. The RX tranny and other FT4WD 5 MT's would be 3.7:1. The last 4EAT FT4WD turbo I parted out was also a 3.9:1. But many turbo's were 3.7:1..... I don't know if that applies to the 4EAT FT4WD tranny or not. Perhaps some years were different from others. I don't know for sure. GD Link to comment Share on other sites More sharing options...
MysteriousXTC Posted August 31, 2008 Author Share Posted August 31, 2008 thanks for the input guys, its really clearing things up for me... Honestly I used to know the answers to most of the questions I am posing but I got away from these models for so long that I guess I have forgot... Really can't wait to go pick up the car... Will post pics when I do... Thanks again... Link to comment Share on other sites More sharing options...
suberdave Posted August 31, 2008 Share Posted August 31, 2008 i have done this same thing on my 87 GL-10, and want to clear a few things up. not to cause any problems. but a 87 GL-10 will not be FT4WD nor will it have the 4EAT. the 4EAT did not come out in the GL's till 89. thus the GL-10 has a 3AT and will be PT4WD. witch is a good thing since you want to swap to a M/T. because the 3AT turbo auto has 23 spline axels just like your D/R M/T. the auto axel ratio will be 3.7:1 and you will need to find a 3.9:1 diff to go with your D/R. your spedo cable will need to be swaped out but any M/T gl cable will work. you will need to find a pedal box and clutch cable. and the front section of rear drive shaft from a manual trans. you will have to jump the ECU or jump the gear select switch so the ECU thinks its in P or N. now if you want your ceruse control to work you will also have to wire in a clutch switch so it will cancel when you push in the clutch. (this is a must or your engine will rev to the moon when you push in the clutch, after forgetting to turn of the CC). i will be watching this thred or PM me if you have any other questions. -=Suberdave=- www.suberdave.com Link to comment Share on other sites More sharing options...
MysteriousXTC Posted August 31, 2008 Author Share Posted August 31, 2008 i have done this same thing on my 87 GL-10, and want to clear a few things up. not to cause any problems. but a 87 GL-10 will not be FT4WD nor will it have the 4EAT. the 4EAT did not come out in the GL's till 89. thus the GL-10 has a 3AT and will be PT4WD. witch is a good thing since you want to swap to a M/T. because the 3AT turbo auto has 23 spline axels just like your D/R M/T. the auto axel ratio will be 3.7:1 and you will need to find a 3.9:1 diff to go with your D/R. your spedo cable will need to be swaped out but any M/T gl cable will work. you will need to find a pedal box and clutch cable. and the front section of rear drive shaft from a manual trans. you will have to jump the ECU or jump the gear select switch so the ECU thinks its in P or N. now if you want your ceruse control to work you will also have to wire in a clutch switch so it will cancel when you push in the clutch. (this is a must or your engine will rev to the moon when you push in the clutch, after forgetting to turn of the CC). i will be watching this thred or PM me if you have any other questions. -=Suberdave=- www.suberdave.com Thanks for the info... Definately didn't cause any problems, infact that just made my outlook on doing the swap a hell of a lot better... And thanks for mentioning the cruise control because I completely neglected to think about that!!! Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 31, 2008 Share Posted August 31, 2008 Thanks for the info... Definately didn't cause any problems, infact that just made my outlook on doing the swap a hell of a lot better... And thanks for mentioning the cruise control because I completely neglected to think about that!!! So is it in fact a 3AT rather than a 4EAT? GD Link to comment Share on other sites More sharing options...
MysteriousXTC Posted August 31, 2008 Author Share Posted August 31, 2008 So is it in fact a 3AT rather than a 4EAT? GD I wont see the car until tuesday when I pick it up... Assuming dave is right then it will be a 3AT... Honestly I dont care what it is though as it will be getting swapped soon... Link to comment Share on other sites More sharing options...
MysteriousXTC Posted September 1, 2008 Author Share Posted September 1, 2008 your spedo cable will need to be swaped out but any M/T gl cable will work Another question just to clearify... The 87 that I am getting has a digidash/gage and my 89 has the analog, will the speedo cable cable from my analog(89wagon) connect and properly work the digidash? Link to comment Share on other sites More sharing options...
GeneralDisorder Posted September 1, 2008 Share Posted September 1, 2008 Another question just to clearify... The 87 that I am getting has a digidash/gage and my 89 has the analog, will the speedo cable cable from my analog(89wagon) connect and properly work the digidash? Yes. GD Link to comment Share on other sites More sharing options...
MysteriousXTC Posted September 1, 2008 Author Share Posted September 1, 2008 Yes. GD thats what I like to hear ... thanks.. Link to comment Share on other sites More sharing options...
MysteriousXTC Posted September 2, 2008 Author Share Posted September 2, 2008 The car this thread surrounds; http://www.ultimatesubaru.org/forum/showthread.php?p=762140#post762140 Link to comment Share on other sites More sharing options...
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