Volvo RWD 120-130 Forum

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differences between M40 and M41 tranny (122 swap) 120-130

posted by  justin on  Sun Oct 10 07:05 CST 2004
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last visit: Mon Jun 8 10:09 CST 2009
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I have a M41 in my 122. I had a shop shorten the front of the driveshaft and balance it as a unit. I recall 11.5" being the correct figure, but you really need to take flange widths into account. You will also need to do a slight bit of wiring and decide how you want to switch it. No crossmember changes. Speedo gear is in the OD and may need to be replaced to account for different rear end ratios, but seems like a real PITA. I've used a speedo cable from a 160 without the angle drive without problems for several years now. The 160 cable is long enough to be routed through the proper holes.
--
Justin 66 122E
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New differences between M40 and M41 tranny (122 swap) [120-130]
posted by  crankyrobot  on Sat Oct 9 18:34 CST 2004 >


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