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J'ai lu dans ce thread que les différentiels de Jeep Cherockee fittait sur nos volvo, j'me demandais si quelqu'un l'avait déja essayé ou connu quelqu'un qui l'a fait. Ça semble une alternative interessante côté prix. J'ai vu aussi le Quaife ATB Helical LSD differential mais le prix de £645.00 me bloque un peu ...
http://www.quaife.co.uk/Volvo-240-ATB-differential
Si y'en à qui connaissent d'autres solutions à part de souder le différentiel, je suis tout ouïe.
Pour ceux que ça intéresse voici le bout interessant
J'ai lu dans ce thread que les différentiels de Jeep Cherockee fittait sur nos volvo, j'me demandais si quelqu'un l'avait déja essayé ou connu quelqu'un qui l'a fait. Ça semble une alternative interessante côté prix. J'ai vu aussi le Quaife ATB Helical LSD differential mais le prix de £645.00 me bloque un peu ...
http://www.quaife.co.uk/Volvo-240-ATB-differential
Si y'en à qui connaissent d'autres solutions à part de souder le différentiel, je suis tout ouïe.
Pour ceux que ça intéresse voici le bout interessant
The limited slip differential ( LSD ) was an optional extra on many Volvo models and the units were fitted at the dealership: This applied to later 140s, 240s and 740/760 models. All 240's and 7 series LSDs with the 'solid live rear axle' used either the [ Dana M30 - Dana 30 with 27 spline axles ] OR [ M31 - Dana 31 with same 27 spline axles ].
(LSDs on older 1960s-70s era Volvos used a Dana 27 with 10 spline axle eg P1800, 122 early 140's).
From 1970, the M30 (Volvo / R-Sport LSD #279951-8) was available. You can still buy new Volvo LSD's (eg. Volvo dealer, SAM). with spare parts readily available from SAM in Sweden. OR via the Volvo dealer network for most 'but not all' internal components - price logic on some dealer parts is questionable, other parts reasonable.
Note: the LSD inside 7 & 9 series diffs are different in external carrier shape and use for instance different securing bolts (socket cap head) that hold the small and large carrier together. Note: the bolt head size (same left-hand UNF thread) is incompatable with earlier LSD's as the socket cap head pokes out to far and fouls the diff housing. KEEP old LH housing bolts they will be in demand soon enough.
If you know of other changes or have information not found on the page, please email Anthony
Diff Identification 1030 and 1031 - outlined below are the Volvo versions of the Dana M30 (27 spline) and the M31 (27 spline). Volvo diffs are 1030 and 1031 (Volvo replaced the 'M' with a 10). The diff is part Volvo (Metric) and part Dana (Imperial). For example, the thread system is mostly UNF (Unified National Fine) from the tailshaft flange bolts (Front 5/16 x 24 TPI UNF. Rear diff flange 3/8 x 24 TPI UNF) all the way to the 240 wheel studs/nuts 1/2"x 20 TPI UNF (740 is M12x1.5) , and UNC (Coarse) for diff cover plate bolts and other areas. Metric threads are found on the diff ends where the dust, disc & handbrake assemblies attach. Essentially much of the transmission system starting rearward with the Laycock overdrive / tailshaft flanges / diff / use imperial dimensions and threads.
The Volvo 1030 Dana 30 differential is a pretty tough unit with beefy axle diameters (1-3/8" stepped to 1-5/16") to match some V8's.
The 1030 diff is most common in the earlier 240 series with 4 cyl engines and more than a few have LSDs fitted. The early days 70s-80 140/240's with their 4 speed boxes and carby engines required a greater range of diff ratios to suit customer needs, hence a full range of ratios were available (depending on markets) - 3.31, 3.54, 3.73, 3.91, 4.11, 4.30, 4.88:1. The 1030 holds 1.3 litres of oil.
The 6 cylinder 260's use a 1031 with low numeric ratios eg 3.31, 3.54.
Modern Dana versions are called Power Lok
1031 - Around 1981 onwards, most 4 cly 240's came fitted with the 1031 and from what I have seen in ratios of 3.54, 3.73 to 4.41. However, 264 models have been fitted with the 1031 version for years. Outside of Scandinavia, the 1031 with a LSD is not very common.
John Sargent writes: "The Limited Slip Differential was fitted as a dealer option to certain 1031 rear axles. The LSD add-in for this axle is a Dana Power Lock with Volvo's name on it and a tone ring for cars with electronic speedometer."
Differences : The 1031 housing is a bit stronger again than the 1030 as it has the extra rib, and fitted with larger diameter gears on the crown wheel and pinion (Volvord in Canada writes: "30 series uses a 7.2" ring gear while the 31 uses a 7.562". This small increase in diameter of the ring gear and the larger pinion gear (1.376" vs 1.406") adds up to a marked increase in strength"). The front pinion shaft diameter & bearings are larger. Note the 'LSD centre' is the same unit. If trying to fit a different diff ratio (eg. change of crown wheel) from a 1030 diff into it a 1031 diff (or vice-versa) forget it. If you wish to change diff (final drive) ratios, stick to the same diff version componentry. In summary, don't try and mix'n'match 1030/1031 parts. The 1031 holds 1.6 litres of oil.
Outside of Sweden & Norway,1031 diffs with LSD are rare. Ivar Finnvik from Norway writes: we used the 240 Turbo in European Rallycross championship in the late eighties and the M31 (1031) was the one and only axle to use.
There, so now you know!!
(LSDs on older 1960s-70s era Volvos used a Dana 27 with 10 spline axle eg P1800, 122 early 140's).
From 1970, the M30 (Volvo / R-Sport LSD #279951-8) was available. You can still buy new Volvo LSD's (eg. Volvo dealer, SAM). with spare parts readily available from SAM in Sweden. OR via the Volvo dealer network for most 'but not all' internal components - price logic on some dealer parts is questionable, other parts reasonable.
Note: the LSD inside 7 & 9 series diffs are different in external carrier shape and use for instance different securing bolts (socket cap head) that hold the small and large carrier together. Note: the bolt head size (same left-hand UNF thread) is incompatable with earlier LSD's as the socket cap head pokes out to far and fouls the diff housing. KEEP old LH housing bolts they will be in demand soon enough.
If you know of other changes or have information not found on the page, please email Anthony
Diff Identification 1030 and 1031 - outlined below are the Volvo versions of the Dana M30 (27 spline) and the M31 (27 spline). Volvo diffs are 1030 and 1031 (Volvo replaced the 'M' with a 10). The diff is part Volvo (Metric) and part Dana (Imperial). For example, the thread system is mostly UNF (Unified National Fine) from the tailshaft flange bolts (Front 5/16 x 24 TPI UNF. Rear diff flange 3/8 x 24 TPI UNF) all the way to the 240 wheel studs/nuts 1/2"x 20 TPI UNF (740 is M12x1.5) , and UNC (Coarse) for diff cover plate bolts and other areas. Metric threads are found on the diff ends where the dust, disc & handbrake assemblies attach. Essentially much of the transmission system starting rearward with the Laycock overdrive / tailshaft flanges / diff / use imperial dimensions and threads.
The Volvo 1030 Dana 30 differential is a pretty tough unit with beefy axle diameters (1-3/8" stepped to 1-5/16") to match some V8's.
The 1030 diff is most common in the earlier 240 series with 4 cyl engines and more than a few have LSDs fitted. The early days 70s-80 140/240's with their 4 speed boxes and carby engines required a greater range of diff ratios to suit customer needs, hence a full range of ratios were available (depending on markets) - 3.31, 3.54, 3.73, 3.91, 4.11, 4.30, 4.88:1. The 1030 holds 1.3 litres of oil.
The 6 cylinder 260's use a 1031 with low numeric ratios eg 3.31, 3.54.
Modern Dana versions are called Power Lok
1031 - Around 1981 onwards, most 4 cly 240's came fitted with the 1031 and from what I have seen in ratios of 3.54, 3.73 to 4.41. However, 264 models have been fitted with the 1031 version for years. Outside of Scandinavia, the 1031 with a LSD is not very common.
John Sargent writes: "The Limited Slip Differential was fitted as a dealer option to certain 1031 rear axles. The LSD add-in for this axle is a Dana Power Lock with Volvo's name on it and a tone ring for cars with electronic speedometer."
Differences : The 1031 housing is a bit stronger again than the 1030 as it has the extra rib, and fitted with larger diameter gears on the crown wheel and pinion (Volvord in Canada writes: "30 series uses a 7.2" ring gear while the 31 uses a 7.562". This small increase in diameter of the ring gear and the larger pinion gear (1.376" vs 1.406") adds up to a marked increase in strength"). The front pinion shaft diameter & bearings are larger. Note the 'LSD centre' is the same unit. If trying to fit a different diff ratio (eg. change of crown wheel) from a 1030 diff into it a 1031 diff (or vice-versa) forget it. If you wish to change diff (final drive) ratios, stick to the same diff version componentry. In summary, don't try and mix'n'match 1030/1031 parts. The 1031 holds 1.6 litres of oil.
Outside of Sweden & Norway,1031 diffs with LSD are rare. Ivar Finnvik from Norway writes: we used the 240 Turbo in European Rallycross championship in the late eighties and the M31 (1031) was the one and only axle to use.
There, so now you know!!
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