Porsche 928 Workshop Manual page 904

928 General
30
General
Data
Design
Manual transmission
Type G 28/10/12/55
Direct transmission with layshaft
Ratios*
ihay
32:22
1 st gear 17 ,44 2,5882
1,4545 3,7645
2nd gear 22 38 1,7272
1,4545 2,5122
3rd gear
26 32 '1,2307
1,4545 1,790O
4th gear
1 29 127 IO,9310 /1,4545 ! 1,3541
5th gear / direct ~I,0000 !direct 1 1,0000
Reverse gear ~ ;lo) 13) i.2727 ; ,4545 1 3,3056
Final drive
I "
Drive pinton without hypoid displacement
Manual transmission
Type G 28/l 1 /13
Zl 4 iz ihay iz x ihay
2221 33:21
17 144 12,5882 1,5714 4,0672
22 38 1.7272 '1,5714 '2,7142
26 32 1,2307 1.5714 1.9339
29 27 0,931O 1,5714 1,4629
Final drive ratio ! 11:30 i = 2,7272 (G28/10/55)
~ 11:29
i = 2,6363 (G28/12)
15:33 i = 2,200
Transmission oil
Multigrade gear lube SAE 75 W 90
API - Classification GL 5 (or MIL L 2105 B)
Oil capacities 85 models and earlier = approx. 3,8 liters
! 86 models onward
= approx. 4.5 liters
* ZI = Number of teeth on first gear wheel in the load path of the gear concerned
Zz = Number of teeth on second gear in the load path of the gear concerned
iz = Gear ratio
iky = Layshaft ratio
Technical Data
Printed in Germany - XX, 1988
30 - 0203