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Reply to "Procedure to break in rebuilt transaxle"

The Bentley manual states to change the gear oil after 300 miles for a new or rebuilt unit. That's what I do. No other special behavior/usage is specified.

I use any cheap 75W90 or 80W90 for the first 300, then usually run something a little nicer for the next interval.

I know I'll ruffle feathers, but I used GL-5 Valvoline synthetic for a long time(30,000 miles). There was no excessive wear on any "yellow metals" i.e. the synchro rings or the reverse shift fork. The only wear was the main bearing(steel), of Chinese origin, put there by Trans West in 2002. That company is now defunct, and I bought the best German or Brazilian bearings available when I rebuilt it.

I'll also add that the synchro rings had NO WEAR, and sat on the synchro hubs with the same clearance as NEW. I put them back in the trans and ran it another 15K miles before I zinged the 3rd gear slider with a missed downshift. Trans shifted perfectly after rebuild.

Last edited by DannyP
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