How many try to figure gear set ratio in differentials. And never get something precisely, the year and models can't be perfect at each time because the ratio may be changed by the past for many reasons.
Now We decided to let you a gear ratio chart that is really easy to use. You can verify the ratio directly by opening the differential cover and read the code stamped on the ring gear.
Small cases : 168mm
- H7 = 2.79 ( 39:14 )
- H17 = 3.38 ( 44:13 )
- H41 = 3.45 ( 38:11 )
- H9 = 3.64
- H2 = 3.91 ( 43:11 )
- H1 = 4.10 ( 41: 10 )
- H8 = 4.27 ( 47:11 )
- H12 = 4.44 ( 40:9 )
Medium cases : 188mm
- H25 = 2.56 ( 41:16 )
- H38 = 2.65 ( 45:17 )
- H27 = 2.79 ( 39:14 )
- H33 = 2.93 ( 41:14 )
- H47 = 3.07 ( 43:14 )
- H32 = 3.08 ( 40:13 )
- H23 = 3.15 ( 41:13 )
- H36 = 3.23 ( 42:13 )
- H34 = 3.25
- H39 = 3.38 ( 44:13 )
- H30 = 3.46 ( 45:13 )
- H24 = 3.64 ( 40:11 )
- H35 = 3.73 ( 41:11 )
- H22 = 3.91 ( 43:11 )
- H21 = 4.10 ( 41:10 )
- H28 = 4.27 ( 47:11 )
- H31 = 4.45 ( 49:11 )
Large cases : 210mm
- H69 = 2.81 ( 45:16 )
- H53 = 2.929 ( 41:14 )
- H63 = 2.933 ( 44:15 )
- H56 = 3.07 ( 40:13 ) ( 12mm )
- Hk59 = 3.08 ( 40:13 ) ( 14mm )
- H57 = 3.15 ( 43:11 )
- H68 = 3.15 ( 41:13 )
- MH150 = 3.23 ( 43:13 )
- H64 = 3.25 ( 39:12 )
- H60 = 3.46 ( 38:11 )
- XMG362= 3.62 ( 47:13 )
- H54 = 3.64 ( 40:11 )
- H55 = 3.73 ( 41:11 )
- H52 = 3.91 ( 43:11 )
- G58X = 4.10 ( 41:10 )
8 Comments
On the 168’s: H2 is 3.91. H1 is 4.11.
188 h38 – 2.65
H47V out of a Z3 – what should it be?
The ratio is 3.07
Thanks for the update! That was quick
No problemo !
good job,
thank you for updating
hi mine is H59 on a 210mm crown 3.08. I want to find a replacement. pls advise. thank you
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