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Old 02-18-2014, 06:16 PM   #1
civic_eater
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Questions about my 318 to 325 motor swap

Was just wondering if my m44 1.8l auto transmission will bolt up to my m50 vanos 2.5l any info you guys can share is greatly appreciated
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Old 02-18-2014, 06:26 PM   #2
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Is it going to bolt up, yes. Will it work, maybe with a miracle. Highly doubt the harness and computer will plug in. Even if it does, it will have to deal with 50 more horses, so it will most likely go soon. The ratio will be a bit off too...
Do it right the first time.
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Old 02-19-2014, 05:35 AM   #3
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Cool thanks
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Old 02-20-2014, 09:47 PM   #4
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there is 0 difference between a 4 speed auto in a 318 and a 4 speed auto in a 325 as far as the trans itself goes the only gear ratio that is different between the two is the final drive ratio

the 4 speed auto used in most auto e36's was built by gm. and though it can be a bit of a slush bucket compared to a zf i doubt you will make enough power with an N/A 2.5L to munch it. if you google it that same 4 speed (460le or something like that) was used in all kinds of different applications including full size vans and half ton pickup trucks where it wasnt heavy enough and often lasts no longer then 130k but those are 4500lb vehicles that get used to haul tools to work and so on you can find torque specs for it online as well, how acurate they are i dont know.

if my memory serves me correctly a e36 318i auto has a 4.44 rear end in it from the factory you would have very quick acceleration if you used your current trans/rear end with a 2.5L
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Old 02-20-2014, 10:53 PM   #5
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there is 0 difference between a 4 speed auto in a 318 and a 4 speed auto in a 325 as far as the trans itself goes the only gear ratio that is different between the two is the final drive ratio

the 4 speed auto used in most auto e36's was built by gm. and though it can be a bit of a slush bucket compared to a zf i doubt you will make enough power with an N/A 2.5L to munch it. if you google it that same 4 speed (460le or something like that) was used in all kinds of different applications including full size vans and half ton pickup trucks where it wasnt heavy enough and often lasts no longer then 130k but those are 4500lb vehicles that get used to haul tools to work and so on you can find torque specs for it online as well, how acurate they are i dont know.

if my memory serves me correctly a e36 318i auto has a 4.44 rear end in it from the factory you would have very quick acceleration if you used your current trans/rear end with a 2.5L

Ahh, but what Google forgot to tell you is that they change the electrical plugs between all those GM's! Just so you can NOT interchange them. In fact and 328 trans will NOT work on a 528, altho the engine is 100% the same. And between 96 to 98 there were 3 variations of the 328i trans, and they are not interchangeable.
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Old 02-21-2014, 08:07 AM   #6
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Ahh, but what Google forgot to tell you is that they change the electrical plugs between all those GM's! Just so you can NOT interchange them. In fact and 328 trans will NOT work on a 528, altho the engine is 100% the same. And between 96 to 98 there were 3 variations of the 328i trans, and they are not interchangeable.
because a 528 uses a 5 speed zf auto ZF5HP or something like that. only the 3 series had the gm trans as far as i know ive seen a ZF5HP from a 320 go into a 528..... aside from maybe the wiring the bell housing bolts right up to the motor bmw was using car parts like lego bricks in the 90's. ive personally never owned a 5er so i am less familiar with them then i am with the e36 and its components but ive pretty much ate n slept e36's the past few years. most 328i autos would have the gm 4 speed NOT the ZF 5 speed auto used in the 5 series, 7 series, 320i auto, and m3 auto
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Old 02-21-2014, 10:47 AM   #7
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Way off on most of those...The 5s do have a GM, the 328's have different versions of the GM. And like I said right from the start, anything will bolt up!!! So we are pretty much going in circles with this...
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Old 02-21-2014, 03:40 PM   #8
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yeah there was 5 or 6 versions of that gm trans i got my part numbers backwards/mixed up as well lol . you mean a gm 480le? used by jag and rolls royce? was simply a slightly more robust version of the 460le. i took a motor from a 96 blazer and put it in my 98 c/k 1500. the trans in the 98 is YEAR SPECIFIC because of the wiring/dme like you mentiond but this IS NOT a dead end and we still got the blazer motor to work with parts from both vehicles. and from what i understand this is what the op was asking ANYTHING is possible with time money and effort or some combination of 2/3. having whole running donor cars also helps. do your research check realoem interchanges see what actually is and isnt different and decide if you want to swap the trans as well after you plan everything out but before you start spending $$$ on parts tons of people have done this swap or similar before im pretty sure ive even seen pretty decent DIY write ups on it as well. google is our friend lol dont take my word for it im not the best when it comes to explaining my thoughts to other people research it yourself
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