Lot 9191: 1988 BMW 730i

The 1988 BMW 730i E32 uses the ZF S5-31 5-speed manual transmission, which is generally robust but has several common issues after 38+ years:

Most Common Problems:

1. Synchronizer Wear - Especially 2nd and 3rd gear synchros become worn, causing grinding during gear changes
2. Shift Pin Issues - BMW issued service bulletins for worn shift pins that can cause difficulty engaging gears
3. Clutch Wear - Normal wear items including clutch disc, pressure plate, and throw-out bearing
4. Oil Leaks - Rear main seal and transmission input seal leaks (your listing already notes “slight oil leak from rear seal”)
5. Bushing Wear - Shift linkage and transmission mount bushings deteriorate over time

Age-Related Issues:

• Synchro degradation causing rough shifting
• Bearing wear leading to transmission noise
• Seal hardening and leaks
• Shift linkage play and imprecise gear selection

The good news is that your listing states the “engine and gearbox in good condition,” which suggests these issues may not yet be severe. The noted oil leak is very common and typically indicates seal replacement is needed rather than major transmission work.

For a 1988 with 68,324 km, regular maintenance including proper transmission fluid (Castrol Syntrans B 75W-90 GL-4) and clutch adjustments will help prevent major issues.

Would you like me to help you find similar E32s with manual transmissions, or do you have questions about maintaining this classic BMW?