dean1484
dean1484 Dork
10/17/10 12:50 p.m.

I went back to read the manual about what type of diff oil to use and low and behold it said to change the stuff every 60K. It has been 5 years and who knows how many miles (100K???) as the odometer stopped about the time I change the train the last time. I think I may have a clue as to why this let go. By the way it does not seem to be the usual R&P failure this time I sounds like a bearing. Either an output stub axle bearing or something in the actual trans. I wont know until I take it apart.

Knurled
Knurled HalfDork
10/17/10 12:57 p.m.

What kind of transmission?

dean1484
dean1484 Dork
10/17/10 5:30 p.m.
Knurled wrote: What kind of transmission?

Porsche 924s (same as the early 944's)

pigeon
pigeon Dork
10/17/10 9:14 p.m.

This always scares me. My 944's trans whines like nobody's business, probably R&P bearings. I will have it out to do the torque tube this winter and may tear into it then, depends on how motivated I am at the time.

For transmission oil use any GL4 gear oil. I changed to Redline MT90 when I got mine and it helped a balky 3rd gear syncho. From my reading many swear by Swepco but there's a Redline dealer 5 minutes from my office and I've had good success with MT90 in my old Miata. I'll probably change it out annually given how hard I intend to beat on this car - autocross and HPDE will be its primary purpose in life.

turboswede
turboswede SuperDork
10/17/10 10:04 p.m.

At least they're just Audi transaxles, parts and knowledge aren't too hard to find. Plus they're easier to change than their original installations (Audi FWD)

dean1484
dean1484 Dork
10/18/10 8:27 a.m.
turboswede wrote: At least they're just Audi transaxles, parts and knowledge aren't too hard to find. Plus they're easier to change than their original installations (Audi FWD)

I think you are talking the original 924? They had the old Audi snail shell unit.

Good 944 ones are getting harder to find as they are blowing up. Ones from a 951 are commanding $$$$$. Regular used 100K LSD units have been in the $800 range and if you want the one with the hardened gears expect to pay 2-3k for a used one.

A couple years back you could get a use in trans for $150 all day long. Now they want $350 and you really have no idea what you are getting. Could blow up a week after install and you really can not tell by looking at it. I guess you could magnaflux the R&P but not an easy task with it in the unit and taking one apart is not fun.

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