No announcement yet.

'91 Audi Coupe 7A Manual Transmission and Rear Gear Oil

  • Filter
  • Time
  • Show
Clear All
new posts

  • '91 Audi Coupe 7A Manual Transmission and Rear Gear Oil

    The manual transmission hooked up to 7A has 310,000 miles. The fluid has only been changed once at about 120,000 miles. There are no leaks.

    Do I need to change the MTF and gear oil? Actually, never mind! I want to change the MTF and rear axle oil.

    I used Audi oil long ago that is no longer available. I remember using Redline and shifting was noticeably poor in cold weather. I changed back to Audi oil (G50?) and shifting improved greatly.

    What should I use this time around. I live in a 4 season environment and can drop as low as -10 Fahrenheit.

    I see below listed:

    Moly 75W90 Fully Synthetic Hypoid Gear Oil
    Motul Gear 300 LS 75W90 (1 Liter) - Motul 105778
    Audi VW Gear Oil Synthetic 75W90 - Genuine VW Audi G052145S2

    Mobil 1 104361 75W-90 Synthetic Gear Lube

    Thank you!
    Last edited by cgharibo; 18 September 2023, 23:26.

  • #2
    Can you get Castrol syntrax 75/90? Very good stuff. Just don't use a GL5 in your gearbox due to sulphur and brass synchro. Rear diff EP90 gl5 of high quality.
    Nothelle S2 Avant keeping me busy
    Wr Ur Quattro restored and gone
    S2 Coupe restored and gone
    Urs6 plus spec restored and gone