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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

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940 m46 to m90 conversion

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Old Jun 1st, 2020, 20:59   #11
360beast
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Photo of speed sensor for clarity

https://volvoforums.com/forum/attach...100_4817-1.jpg
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Old Jun 1st, 2020, 21:37   #12
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Photo of speed sensor for clarity


I'll try and get a pic of my old one tomorrow, it's definitely higher.
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Old Jun 2nd, 2020, 00:58   #13
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That is the later type as found on 940's and ABS 700 series

The 12 tooth sensor is a screw in sensor
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Old Jun 2nd, 2020, 01:24   #14
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That is the later type as found on 940's and ABS 700 series

The 12 tooth sensor is a screw in sensor
That's not what was on my 760 (with ABS) at all.
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Old Jun 2nd, 2020, 14:46   #15
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More questions again with regards to swapping from M46 to M90 (and bearing in mind I have a complete M90 equipped 1996 2.3 LPT as a donor):
  • Is it silly to try this on my own, with the car on stands or ramps, with a trolley jack (i.e no ramp or trans jack)
  • I will marked the prop to the box on the M90 LPT prior to removing it, but how am I supposed to know which orientation it fits to the diff on the HPT? Trial and error, best of 4?
  • But above all else, before any of the aformentioned and before I spend money and time doing this, it worth it? I mean if I go down the M46 flywheel and Swedespeed clutch kit route, mated to an M90, will it ultimately be worth the effort on a stock J-reg HPT car?
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Old Jun 2nd, 2020, 14:59   #16
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Quote:
Originally Posted by knuckledragger View Post
More questions again with regards to swapping from M46 to M90 (and bearing in mind I have a complete M90 equipped 1996 2.3 LPT as a donor):
  • Is it silly to try this on my own, with the car on stands or ramps, with a trolley jack (i.e no ramp or trans jack)
  • I will marked the prop to the box on the M90 LPT prior to removing it, but how am I supposed to know which orientation it fits to the diff on the HPT? Trial and error, best of 4?
  • But above all else, before any of the aformentioned and before I spend money and time doing this, it worth it? I mean if I go down the M46 flywheel and Swedespeed clutch kit route, mated to an M90, will it ultimately be worth the effort on a stock J-reg HPT car?
Last question first, unless you plan to or have already modified for increased power, no gains at all to be had if your current box is working as it should, 25 years of wear and tear taken into account. It would just be an exercise in spennering really.

As for the prop/diff, best of two positions. The 4 bolts are in an "H" pattern, not a perfect square so will only fit in two positions.

You could do it with the kit you've got but it would be more difficult and sometimes that extra pair of helping hands can make all the difference.
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Old Jun 2nd, 2020, 16:05   #17
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All I will say is that after breaking four 940s and intending to m90 convert my 940 that I won't be attempting it without removing the engine and gearbox in one, fitting the m90 to the engine after replacing all gaskets and engine mounts then refit it. I have split a box from an engine under the car before and it was an absolute pig of a job trying to undo the bolts that join the box to the engine.
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Old Jun 2nd, 2020, 17:32   #18
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Quote:
Originally Posted by 360beast View Post
All I will say is that after breaking four 940s and intending to m90 convert my 940 that I won't be attempting it without removing the engine and gearbox in one, fitting the m90 to the engine after replacing all gaskets and engine mounts then refit it. I have split a box from an engine under the car before and it was an absolute pig of a job trying to undo the bolts that join the box to the engine.
I can agree with Luke on that one !! I did it under the car in the middle of winter outside
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Old Jun 2nd, 2020, 17:40   #19
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As promised, a pic of mine for comparison - when it was still in the car. As can be seen, the sensor is a lot higher!
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Old Jun 2nd, 2020, 20:36   #20
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On a 2 post ramp it is a easy enough job and should only take 2-3 hours taking it easy.
On your back expect to spend most of the day on it.

Is it worth it? Well it all comes down to how much you prefer the M90
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