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Location:
Melbourne
Registered:
November 2003
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TA22 Rear Discs
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Sat, 20 August 2005 12:17
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Oh no, I hear you groan, another idiot asking this question... haven't we done this to death yet...
Yes, apparently we have...
Anyhow, what I wanted to post was simply my experience with this conversion to date and a warning for those going to try it. The excellent instructions in the Tech Articles section is aimed at T/RA23s and 28s with some mentions for AE86s and RA40s. It is located here http://www.toymods.org.au/xA2x_rear_discs.html
Cool, I thought, how different are the TA22s and 23s...
Enough it seems...
So having procured an RT141 disc rear axle, I proceded, with the help of a mechanic friend who runs a workshop to relocate shock mounts and fit new wheel bearings. I intended on bringing the whole lot home happy in the knowledge that all I had to do was reassemble and it would be done... Erm. Not so.
During the course of the day I noted that the bearing size of the TA22 is smaller than that in the RT141. This by itself isn't a problem, however, the backing plate, as noted in the tech article is of a different thickness than the steel one off the drum setup. The article covers this by saying to use the retainer plate off the RT141 axles. This retainer plate has a ring welded onto the inside face to take up the extra thickness of the backing plate and positively locate on the bearing to hold it into the axle housing. In the case of the TA22 however, this does not help. As the bearing itself is a smaller diameter, the ring doesn't contact the bearing at all meaning it can float out to the retainer plate... Bad!
So I now have to go and get a collar made up that will locate the backing plate and bearing and allow the TA22 retainer plate to clamp the whole lot together. It's a simple bit of lathe work but I'm sure it will still cost a bit. That and I have to take the brand new wheel bearings back off the axle. Possibly meaning new bearing retainers... Measure twice, cut once...
It has been stated several times in the past that the standard drums are more than adequate for street use. So for anyone thinking about this conversion for their TA22, this is just another thing to consider.
Cheers,
Dan
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