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Would this transmission fit in a 122 with B-18 engine? Which trannies fit if one wanted an overdrive transmission besides the M41? Don't want extensive cutting.
1220401 is the number that is on the case, and on the data plate it says J type from a 1975 Volvo
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posted by
someone claiming to be red sled
on
Tue Jun 21 12:55 CST 2005 [ RELATED]
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A few years ago I put an AW71 overdrive A/T in a 122. To solve the "slant" issue I simply sliced the bellhousing(like a big aluminum loaf of bread) about 3-4 inches to the rear of the big end,rotated it to the desired position and re-welded it. Works like a champ! I don't see why that wouldn't work on a manual.
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Yep its usable, but not without mods. The tranny is higher and wider so youre in for some cutting. You can bolt the tranny onto the B18/20 using the bellhousing that is on it, but the tranny will be slanted. This means altering the shifter linkage. Using it slanted may require even a tiny bit more cutting of the tunnel then when using it upright (possible with the rare bellhousing, or a modified one). Your '75 M46 will probably have the same number of splines on the input shaft that the M40/41's do so you can use your stock clutch friction plate. The M46 is sturdy and widely available. Its a very good option. I used one a little while sitting slanted. Worked like a charm. Very thight and quiet tranny. I've currently got a M47 installed upright. I'm not half as pleased with it as with the slanted M46. Have a look at www.tinustechniek.tk click Volvo Amazon > EV-35-29 > Aandrijving , for some pics.
Cheers, ben
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P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)
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posted by
someone claiming to be McBob
on
Mon Jun 13 05:17 CST 2005 [ RELATED]
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If this tranny is truly from a '75 then it came from either a '75 240 (B20F) or a '75 164 (B30). The 'slanted' B21 engines didn't arrive 'til '76. Which means you do have that 'rarer than hens teeth' bellhousing and it should hook up to your B18 engine with no modification. The bigger issue here is the location of the shifter. If you want to keep your 'wobble stick' then you should track down an M41. If you're okay with moving the shifter to a more contemporary location (read: cutting a new shifter hole in your floor and patching the old one) then this will work IF it's really from a '75.
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Those bellhousings weren't made all through '75. Here's my understanding of the situation:
In 1975 Volvo introduced the 240 series - strut front suspension, other various changes. It was intended to be introduced with the new generation of OHC engine and transmissions, but the way things went the 240 bodies started rolling off the production line while Volvo still had large inventories of the 'old' B20's and M41 transmissions. So the first part of 1975 consisted of 240 cars with B20/M41 drivetrains - no different really than a 140 drivetrain. The supplies of B20 motors ran out before the supply of M41 transmissions, though. So for a short period of time they used the new B21 motor with the old M41 transmissions, utilizing the rare bellhousing. Then, later on in 1975, they used up the last of the M41's, and started using the new M45/46 transmissions.
So the bellhousings are rare because they were only used for a fairly breif period in the middle of 1975.
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I'm JohnMc, and I approved this message.
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The supplies of B20 motors ran out before the supply of M41 transmissions, though. So for a short period of time they used the new B21 motor with the old M41 transmissions, utilizing the rare bellhousing.
If it realy was a supply issue, this must have been the the other way around: they ran out of M41's and still had some B20 left. So they fitted the 240 series with a B20 and a M45 tranny, hence the rare B20-M45/46/47 bellhousing. I have never heard of a bellhousing that could fit a M41 onto an OHC engine.
But actually, my understanding was that the production of the OHC engines took a little longer then expected. But since the car itself and the M45/46 trannys where ready to use they just fitted the very first 240's with a B20.
Dunno what realy was the case back then though.
Cheers, ben
--
P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)
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D'oh! I got those flipped around! Yes, the M41's ran out, so they hooked on the M45/46's to the B20's.
Yeah, you could be right, perhaps it was that the newer components weren't ready yet. I shouldn't have speculated as to why, just related that '75 240's were of three types:
Early - B20/M41
Mid - B20/M45
Late - B21/M45
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I'm JohnMc, and I approved this message.
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I'm Ben Flierman, and I approve your message. ;)
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P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)
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Here's a website that should answer your question (part 2 of 2):
http://www.volvoadventures.com/amazon2.html
122 with a B20 engine with a M46 tranny->modified bellhousing.
Paul
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Two issues with that transmission (AFAIK it is an M46).
1) It doesn't mount to a bellhousing the same way an M40/M41 does. It will only mount to an M45/46/47 bellhousing. The rub there is that 99.999% of M45/6/7 bellhousings were made for slanted OHC engines. When bolted to an upright pushrod engine (or an OHC engine installed upright) the transmission will be tilted over. There are some that say that isn't much of a problem (shifter tinkering aside). And there are some exceedingly rare B20/M45 bellhousings around to from early production 240s, but they are apparently rarer than hen's teeth.
2) The shifter is designed to be way off the back enfd of the transmission, while the 122 is designed to have it come right out of the top. I don't think there is anyway to convert an M46 to a top shifter, and thus you'd have to chop out the back half of the tunnel to accomodate a 'short' shifter. That's not quite in the 'bolt in' league of modifications, but not terribly hard to do if handy with a MIG welder.
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I'm JohnMc, and I approved this message.
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