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How Interchangeable are the driveshafts? 200 1979

uid 17340's pic
posted by  Nickvjr on  Mon Dec 1 13:12 CST 2003
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last visit: Thu Sep 4 11:15 CST 2014
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Hey Mike,

I do not know if it is this horrible toothache I have or if I'm dumb but I'm having a bad time understanding your question so please bare with me for my answer.

You have a M45 and are thinking to go to a M46. (VERY DO-ABLE)

You have two front driveshafts of equal lengths and one rear driveshaft? I think this is where I'm losing you but here is my answer.

When you do the swap the M46 is bigger (length wise) due to the OD unit installed on the tranny. This in turn changes the length of the front driveshaft (makes it smaller) and the rear driveshaft and support bearing stay about the same. I see no PHYSICAL problems with getting a FRONT DRIVESHAFT off of a M46 setup and linking it to the REAR DRIVESHAFT from you M45 setup. Please do not quote me on this but my reading of the Volvo Factory manuals shows it is very possible. I would highly recommend just getting a COMPLETE driveshaft off of a M46 Setup from you local pick-n-pull. It's about $20 if I'm not mistaken and just check to see if the U-Joints make noise and if the center support bearing sounds smooth. By getting a complete driveshaft in good shape from the junkyard you can just install it without having to balance the driveshaft, which would be my only concern regarding putting together a front & rear driveshaft from different setups. I hope this info helps.

Sincerely,

Nickvjr
1979 264GL 120,600






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