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Old 01-30-2013, 11:31 PM
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Rzeppa Rzeppa is offline
Cruise Moab Committee
 
Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 5,208
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When I did my 4 speed swap on my 71, I just had my original driveshafts retubed at Englewood Driveshaft, so the yokes and flanges stayed the same. Based on what I knew at the time about the different companion flanges and the issues in matching them (see last paragraph), I figured this would be the least brain damage, and indeed this was a very smooth part of the tranny conversion.

4 speed yokes are bigger than 3 speed yokes and the u-joints are different. The 3-speed yokes retain the u-joints with circlips, the 4 speed u-joint races just press in.

To top it all off, there are about 3-4 different companion flanges (and mating yokes) used on our older Land Cruisers (and mini trucks and 4runners, some of which will interchange). There was an excellent article by Rob Mullen in Toyota Trails in the late 1990s which showed all those different companion flanges, with measurements and month/year of production identifying which was used when and on what kind of Toyota.
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Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
http://american3dprinting.net/
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