I've had my 10/90 Tarago (Bubble) van for just over six weeks and the "rattle" under load has now been diagnosed as the supplemental accessory drive shaft (SAD shaft). I have been quoted about $1325 for shaft and then about 4 hours labour to fit. This is much better news than the previous mechanic I took the car to who told me it was a cracked piston and wanted $5K to replace the engine. I've done a little research on the internet and it seems I have to buy the complete shaft from Toyota because there is no aftermarket kit. Can anyone help me here? Is there a cheaper alternative? A wrecker in Melbourne has offered me a s/hand shaft for $600.

I realize that your post is now almost 3 years old...
However, this info may help someone else with the same problem...
I have been informed by many sources that the actual SAD shaft itself almost never is the problem, it is more than likely the couplings at the ends of the SAD Shaft...
There is an importer in Lansvale (Sydney) who will supply brand new couplings for $150 each, and will also fit for $150 if you can't do it yourself, grand total of $450... a huge saving on the quote I got from my local Toyota dealer of almost $4000 , with of course included the replacement shaft, which, as stated earlier, almost never wears out!!!

Regards,
Rich...

Hi Rich,
I know this is now 8 months old, but I would be grateful to know the name of the supplier of said coupling as mine is about to give up the ghost!
Thanks alot,
Paul
paultbott@live.com