Driv3r Posted November 3, 2017 Share Posted November 3, 2017 (edited) Long story short, my 235/5 dogleg died under dyno. I cannot find any 235/5 available for sale in Australia and rebuilding cost is high. I found a 262 sport dogleg that came off either a Euro 528iSE or E30 M3. Box has mechanical speedo and has been recently rebuilt. The same seller had a similar box for sale while ago but I missed the boat on that one. Gear ratios are: 1st..... 3.717 2nd.... 2.403 3rd..... 1.766 4th..... 1.263 5th..... 1.000 The internet search tells me that this is a 265/5 as the US S14 dogleg was 262.0.510.90 and Euro S14 was 262.0.0510.00 otherwise they are the same. I need to know (beside the tunnel cutting/banging), how hard is to hook this up to e21 m10 block that I'm using in my tii. I can source most diff/drive shafts. Would any kind member lay out the process for me? I appreciate in advance. Edited November 3, 2017 by Driv3r Quote Link to comment Share on other sites More sharing options...
Preyupy Posted November 3, 2017 Share Posted November 3, 2017 The bell housing you have will attach to the M10, you will need to modify the shift tower and rod to fit. You will need a custom driveline ( Large 6 cyl guibo) and you will need to heavily modify the tunnel in the car to make room for the gearbox & bell housing( this won’t just st be hammering the sides to make room, you will have to cut the sides and top of the tunnel and fabricate new panels to make room) . The rear trans mounts will need to be moved in the chassis also. Depending on what clutch you have you will have to find a TOB that will work. Good score, they are way stronger than the 235/5. 1 Quote Link to comment Share on other sites More sharing options...
otisdog Posted November 3, 2017 Share Posted November 3, 2017 ^^^^^^ Sir, Your contributions to this forum are always enlightening . I'd love to have a tenth of the knowledge that you have on the subject. 1 Quote Link to comment Share on other sites More sharing options...
Driv3r Posted November 3, 2017 Author Share Posted November 3, 2017 8 hours ago, Preyupy said: The bell housing you have will attach to the M10, you will need to modify the shift tower and rod to fit. You will need a custom driveline ( Large 6 cyl guibo) and you will need to heavily modify the tunnel in the car to make room for the gearbox & bell housing( this won’t just st be hammering the sides to make room, you will have to cut the sides and top of the tunnel and fabricate new panels to make room) . The rear trans mounts will need to be moved in the chassis also. Depending on what clutch you have you will have to find a TOB that will work. Good score, they are way stronger than the 235/5. Is that from M20? I was told to use automatic drive shaft, is that right? Cheers Quote Link to comment Share on other sites More sharing options...
Preyupy Posted November 3, 2017 Share Posted November 3, 2017 I have not compaired the 2002 auto trans driveshaft but I believe the big 6 cyl guibo is larger in diameter. I’m away from the shop right now and can’t compare them, someone else might know for sure. I have never put a 265/5 gearbox in a ‘02, many years ago we thought about it and tried a test fit and decided we did not want to cut that car up that much so we used a 245/10. 1 Quote Link to comment Share on other sites More sharing options...
Tommy Posted November 3, 2017 Share Posted November 3, 2017 27 minutes ago, Preyupy said: I have not compaired the 2002 auto trans driveshaft but I believe the big 6 cyl guibo is larger in diameter. I’m away from the shop right now and can’t compare them, someone else might know for sure. Big six guibo is considerably bigger. The box has to be from M30 big six to fit to M10. It's quite bulletproof option for you but metalwork with the tunnel is the biggest pain. As far as I know the guibo behind the m20 small six is also the small one but I don't have one of those to know exactly. 1 Quote Link to comment Share on other sites More sharing options...
NickVyse Posted November 3, 2017 Share Posted November 3, 2017 Looks the same as the s14 CR box (or is that what you said?) - the m3 prop fits without cutting. At least it did in my old m2 and the engine used the stock mounts. Quote Link to comment Share on other sites More sharing options...
Preyupy Posted November 3, 2017 Share Posted November 3, 2017 Look it up I believe the E30 M3 used a different output flange than the M30 based 265/5 boxes. If you can get the correct flange it might make it easier. 1 Quote Link to comment Share on other sites More sharing options...
zinz Posted November 3, 2017 Share Posted November 3, 2017 Not to hijack, but if you can find a CR Getrag 245 off an early M20, you can swap the bell housing/front cover from standard 4 speed and things mate up pretty easily after that. Not as stout as the 265, but probably stout enough without all the tunnel fabrication. ...just an idea Ed Z Quote Link to comment Share on other sites More sharing options...
NickVyse Posted November 3, 2017 Share Posted November 3, 2017 zinz - I don't know of a 4 speed with a separate bellhousing, am I missing something? Often am :-) 1 Quote Link to comment Share on other sites More sharing options...
zinz Posted November 3, 2017 Share Posted November 3, 2017 ...I didn't describe this very well. Local guru, Terry Sayther offered to do this procedure for me a couple of years ago. His old email describes taking the guts out the back of the M10's 232 and replace them with the internals of the M20 Getrag 245, with the additional section for the 5th gear. Says he used to perform this back in the 80s for racers wanting a stronger CR box on their M10. I'll ping him for clarification. Perhaps he referred to a different case. In any case, this is a procedure left only to professionals with the proper Getrag tools. Whats the movie quote? "I always wanted to work on a transmission..." Ed 1 Quote Link to comment Share on other sites More sharing options...
Driv3r Posted November 3, 2017 Author Share Posted November 3, 2017 ...I didn't describe this very well. Local guru, Terry Sayther offered to do this procedure for me a couple of years ago. His old email describes taking the guts out the back of the M10's 232 and replace them with the internals of the M20 Getrag 245, with the additional section for the 5th gear. Says he used to perform this back in the 80s for racers wanting a stronger CR box on their M10. I'll ping him for clarification. Perhaps he referred to a different case. In any case, this is a procedure left only to professionals with the proper Getrag tools. Whats the movie quote? "I always wanted to work on a transmission..." Ed Please let us know. This shows we were smarter back then. [emoji1] Cheers Quote Link to comment Share on other sites More sharing options...
zinz Posted November 3, 2017 Share Posted November 3, 2017 Here's some evidence of the swapability Ed Quote Link to comment Share on other sites More sharing options...
Preyupy Posted November 3, 2017 Share Posted November 3, 2017 I have converted at least 10 245/11 (close ratio M20) to 245/10 ( M10) I have used both 4 speed and OD 5 speed bell housing/ front trans case. It works great. Turns out the 245/11 boxes have been a bit easier to find for the last 3-4 years. 1 Quote Link to comment Share on other sites More sharing options...
zinz Posted November 3, 2017 Share Posted November 3, 2017 Excellent ? Thanks for the confirmation! Ed Quote Link to comment Share on other sites More sharing options...
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