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aw55-50 v aw50-42

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Old Oct 13th, 2017, 11:53   #1
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Last Online: Oct 13th, 2017 11:53
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Location: South Darenth
Default aw55-50 v aw50-42

hi all
my gearbox broken.
my car is a 1999 V70 2.5T petrol with a AW50-42 gearbox.

so two questions:
1, can i put any AW50-42 box back in? are the bell houses the same on a 2.0, 2.5 diesel, 2.3 T5 and gear ratios?

2. can i replace with a AW55-50 box? i know will need things like the gear shifter and gearbox ecu. but is it a replaceable option without major surgery.

any help much appreciated

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Old Oct 15th, 2017, 09:28   #2
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Location: Castleford

Hello there glad to know I'm not on my own with the 5 Speed auto.

You can't change it to a 4 Speed auto. You cannot just change to manual as it's ME7 system.

Why not fix the auto ?

I'm in middle of fixing mine...suffering from flares and smashing into gear or not going into gear at all.
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Old Oct 15th, 2017, 14:42   #3
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On the 1999 V70 with the AW50-42 the bell housing used on the diesel is different to the petrol engined one.

Both bell housings have the same 'gearbox proper' mounting bolt layout.

I believe there can be different final drive ratios too.

Early AW50-42 gearboxes have some different types of sensors though case threads and drillings are the same.

With determination and research these problems can usually be overcome - the replacement gearbox I fitted in my V70 diesel came from a C70 petrol.

I did a thread on here 2 - 3 years ago but only actually changed the gearbox after initially trying to repair the original box - so the swapout is later in the thread.

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Old Oct 15th, 2017, 16:53   #4
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Originally Posted by winsox View Post
You cannot just change to manual as it's ME7 system.
can be done but its not as easy as a pre ME7 swap
Horsepower is how fast you hit the wall
Torque is how far you take the wall with you
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auto box v70, auto gearbox swap, gearbox failure

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