3.07 LSD?
Moderators: GRNSHRK, ron, bfons
3.07 LSD?
Hi All,
Was there ever a 3.07LSD fitted to the E24?
As I understand it only the M6/M635 got LSD and the ratio was 3.73 in Europe, 3.91(?) in the US.
Cheers,
Ian
Was there ever a 3.07LSD fitted to the E24?
As I understand it only the M6/M635 got LSD and the ratio was 3.73 in Europe, 3.91(?) in the US.
Cheers,
Ian
1985 M635CSI
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Re: 3.07 LSD?
Ian, the European series I E12 based 635's with the M90 and CR trans did indeed have a 3.07 diff
However, this is a sideloader and is not compatible with the series II E28 chassis 6ers
edit: you mention LSD, not sure about that but I would surmise that limited slip was an option
Perhaps at this point we need somebody who actually has one, to step up to the plate
However, this is a sideloader and is not compatible with the series II E28 chassis 6ers
edit: you mention LSD, not sure about that but I would surmise that limited slip was an option
Perhaps at this point we need somebody who actually has one, to step up to the plate
Bobbo
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Re: 3.07 LSD?
Thanks for the info. The reason I ask is that I have been speaking to a guy here that claims to have an E24 3.07-LSD. From his pictures the diff case looks similar to my '84 EU M635...
1985 M635CSI
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Re: 3.07 LSD?
Hmm, well, that does sound weird
Pretty sure you have the correct ratios, however
US M6 = 3.91
Euro M635 = 3.73
My advise would be to get her up so that you can turn the prop shaft and count the wheel revolutions
Pretty sure you have the correct ratios, however
US M6 = 3.91
Euro M635 = 3.73
My advise would be to get her up so that you can turn the prop shaft and count the wheel revolutions
Bobbo
1980 633 CSi Cypress Green/Pearl Beige
2017 X5 M Sport Xdrive 35i Carbon Black/Ivory White
2005 330 Ci ZHP Cabrio Imola Red/Bone/Black
Re: 3.07 LSD?
Yes, the early side loader 3.07 did come limited slip. I have a 1980 635 euro with one in the shop now.
1981 635 Hennarot
1980 635 Polaris (Project)
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Re: 3.07 LSD?
Have an 81 euro came with an open 3:07 sideloader now has an LSD 3:07
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
flickr.com/photos/bertsphotos.
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Re: 3.07 LSD?
06/83 Euro 635 (8181587) e28 base with 3.07 Medium Case (188 MM) LSD with an autobox in front of it.
The M5/M6 cars were equipped with the Large Case (210 MM) LSD. They look very similar and unless you know the differences, a picture will not provide the "size" reference you need to determine which is which.
The Medium Case will have 6 bolts securing the Bearing Carrier Side Flanges to the case. The Large Case will have 8 bolts securing the flanges
All the mounting holes to secure the unit to the subframe are the same.
Ralph
The M5/M6 cars were equipped with the Large Case (210 MM) LSD. They look very similar and unless you know the differences, a picture will not provide the "size" reference you need to determine which is which.
The Medium Case will have 6 bolts securing the Bearing Carrier Side Flanges to the case. The Large Case will have 8 bolts securing the flanges
All the mounting holes to secure the unit to the subframe are the same.
Ralph
There is a very fine line between "Hobby" and Mental Illness.
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85 635csi Zinno Auto
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Re: 3.07 LSD?
As far as I know, all UK manual 635 E24s (Series 2, E28-based) had the large case 3.07 LSD. That has certainly been the case with the three manual cars I've had direct experience of. Same as fitted to all E28 M535is. The earliest (y reg) cars had the medium case lsd in the same ratio.
Highlines had 3.64, with the motorsport editions having the LSD and presumably an option for others. Assume standard for manual.
Highlines had 3.64, with the motorsport editions having the LSD and presumably an option for others. Assume standard for manual.
Last edited by wattsmonkey on Thu Jul 19, 2018 11:08 am, edited 1 time in total.
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'84 635CSi, dogleg...itbs and supercharger????? Eaton Mess
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Re: 3.07 LSD?
...and yes, M635s had 3.73:1 LSD as standard.
"Most of it necessary; all of it enjoyable." LJKS
'84 635CSi, dogleg...itbs and supercharger????? Eaton Mess
'84 635CSi, dogleg...itbs and supercharger????? Eaton Mess
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Re: 3.07 LSD?
And Grace, my 1985 635CSiA came from the factory with a 3.25 open diff. (not a good match for the 182 horse green engine)
Keep the shiny side up
Phillip
Keep the shiny side up
Phillip
Masked Man
85 635CSi Euro
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Big Brake Upgrade
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Upper & lower control arms
New tie rod kit
Re: 3.07 LSD?
Hi Ralph,Ralph in Socal wrote: ↑Thu Jul 19, 2018 7:47 am 06/83 Euro 635 (8181587) e28 base with 3.07 Medium Case (188 MM) LSD with an autobox in front of it.
The M5/M6 cars were equipped with the Large Case (210 MM) LSD. They look very similar and unless you know the differences, a picture will not provide the "size" reference you need to determine which is which.
The Medium Case will have 6 bolts securing the Bearing Carrier Side Flanges to the case. The Large Case will have 8 bolts securing the flanges
All the mounting holes to secure the unit to the subframe are the same.
Ralph
That is a great bit of info my '84 E24 EU M635, I just checked, has 8 bearing carrier bolts. The one this guy has been saying will fit my car, has 6 by the look of this picture:
So, this is an early (E12?) non-M 635CSI LSD?
1985 M635CSI
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Re: 3.07 LSD?
No It is not a side loader diff. IIRC, the side loader was in use up through 5/82. I believe that to be a medium case diff, but am not dead sharp on the post 82 cars.
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
flickr.com/photos/bertsphotos.
- Ralph in Socal
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Re: 3.07 LSD?
Sorry but that picture angle does not give a definitive answer. Ask the seller to pry off the stub axle to get a better shot. Good luck
Ralph
Ralph
There is a very fine line between "Hobby" and Mental Illness.
85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)
85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)