midwesty@MIDWEST.NET writes: << was shopping for some manual transaxle lubricant and found none that was GL4. I saw one that was GL3, GL4, and GL5. one stated GL4 and GL5. Most were GL5. What is the right stuff? Is GL5 ok in an 87 manual transaxle? >> Ah, the age old question. I'd really recommend (strongly) that you only use a GL4 rated synthetic in the 091-1 transaxles. I saw too many problems with the GL5 petroleum based gear oils in these boxes while working at the dealer. GL5 can contain some sulfur compounds which have been known to corrode the brass that is used in the syncros. VW fixed that problem by switching to their GL4 synth (very good if expensive stuff) and a moly-coated syncro. I can only warranty my 091-1 gearboxes if the customer uses a GL4 rated synth. (Their choice of brands is OK. Redline and Amsoil have given good service in the past at about a third the cost of VW's oil) -Todd Hill VolksWerks Transaxles Olympia, WA |
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