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  1. #1
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    Diesel M66 gear ratios

    Does anyone know what the gear ratios are for the

    M66 petrol & M66 diesel ?

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  2. #2
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    Pedro is your nan for those mate.
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  3. #3
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    Quote Originally Posted by M-R-P View Post
    Pedro is your nan for those mate.
    im pretty sure his nan isnt called pedro pmsl


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  5. #4
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    Quote Originally Posted by theflyingbrick View Post
    im pretty sure his nan isnt called pedro pmsl
    fat fingers or small keys

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Stoopid fone!
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  7. #6
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    Sorry don't know the gear box code ( the end bit ) but I guess it's one of theses.

    Last edited by Harvey; Tuesday 29th July 2014 at 23:17.

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  9. #7
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    Quote Originally Posted by Harvey View Post
    Sorry don't know the gear box code ( the end bit ) but I guess it's one of theses.

    The xc70 box looks interesting, for low ratio's

    Current Volvo's 1995 854 Gul T-5R 1996 855 Olive T-5R 1997 855 Olive AWD 1999 V70R AWD and 2005 XC90 D5 AWD
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    The reason behind this thread is, 1st is a waste of time, 5th is the new 4th

    I was thinking about mixing the 1st,2nd & 3rd of a petrol box with 4th, 5th and 6th from a diesel box,

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    Quote Originally Posted by oblark View Post
    The reason behind this thread is, 1st is a waste of time, 5th is the new 4th

    I was thinking about mixing the 1st,2nd & 3rd of a petrol box with 4th, 5th and 6th from a diesel box,
    That would be interesting if possible, as I'm not sure how you would get on swapping in a different cluster, as I'm not sure how it would mesh to the other gears as the ratio would be different or whether you can swap the gear that would drive the cluster, good luck I'm still learning the 5 speed, will no doubt move on to the 6 speed as soon as a suitable one comes up though

    Current Volvo's 1995 854 Gul T-5R 1996 855 Olive T-5R 1997 855 Olive AWD 1999 V70R AWD and 2005 XC90 D5 AWD
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    Hasn`t Pedro mixed a petrol & diesel 5 speed boxes ?

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  13. #11
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    Quote Originally Posted by oblark View Post
    Hasn`t Pedro mixed a petrol & diesel 5 speed boxes ?
    Yes & no, I've put the complete internals from a diesel m56 with the Audi gearbox into a petrol m56 Volvo case

    I've got 7 m66's listed, I'll post them later when I'm not using the i5hite

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    If it helps?....according to Vadis the ratios for diesel and petrol are the same for M56........what you have to watch out for is what year the box comes from as the final ratio can even be 4.45 !!

    I know it`s not M66 but just pointing out!
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    a 19t just isn't laggy enough
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    a 19t just isn't laggy enough
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    Quote Originally Posted by 960kg View Post
    If it helps?....according to Vadis the ratios for diesel and petrol are the same for M56........what you have to watch out for is what year the box comes from as the final ratio can even be 4.45 !!

    I know it`s not M66 but just pointing out!
    the M56H (as named as having in 850 T-5's) came with 4 different final drive ratios (3.77:1, 4.00:1, 4.25:1 & 4.45:1), as you say these all have the same ratios on the gears. The M56L has a lower ratio on 1st & 2nd gear, but came with a choice of the 4 different final drive ratios as listed above depending what model & year. So thats 8 different gearboxes with just 2 codes. I'm using the 850TDi/Audi engine which is M56LK, which has 3 different FDR's

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  19. #15
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    The LK appears on a lot of P2 cars too with 2 possible FDRs iirc
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  20. #16
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    Oh, and there's the L2K box with 2 different FDRs too - that's the derv boxes for the P2
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  21. #17
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    It looks possible to build a 6 speed box so that 2k rpm you are doing 80 mph

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  22. #18
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    Quote Originally Posted by oblark View Post
    It looks possible to build a 6 speed box so that 2k rpm you are doing 80 mph
    Yeah but you'd need to cog it down 2 gears to overtake anything lol
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  23. #19
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    Quote Originally Posted by oblark View Post
    It looks possible to build a 6 speed box so that 2k rpm you are doing 80 mph
    thats some long gearing, mine will only do 64mph@2000rpm in 5th

    edit = just done a quick calculation. If you the longest 6th available which is 0.54:1, with the lowest FDR available which is 3.77:1 you can get 73mph@2000rpm
    Last edited by p fandango; Wednesday 30th July 2014 at 17:36.

  24. #20
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    Still more fettling needed,
    will it never end?
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    Don't forget P2s have a larger circumference wheel/tyre combination so the speed would be lower in an 850 on a standard set up.


 

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