Most A7's were 8/42 or 5.25:1 from 1932 onwards. Late in the production run, the ratio was unified with the Big 7 at 5.125:1 (8/41).
Vans and the early Sports 65/Nippy were 5.625:1 or 8/45. The last Nippy and Speedy models were 5.25:1 I believe.
Over the years, these ratios may have changed about as axles were swopped between cars and CWP sets were changed/upgraded. A friend bought a Ruby in 1978 with a 5.625 CWP and it was awful! 45mph flat out but went up hills well. The change in ratio made a dramatic difference.
So your van axle may have started life on a car or had its internals replaced in 1952 or another myriad of reasons as to why it's apparently incorrect now.
Vans and the early Sports 65/Nippy were 5.625:1 or 8/45. The last Nippy and Speedy models were 5.25:1 I believe.
Over the years, these ratios may have changed about as axles were swopped between cars and CWP sets were changed/upgraded. A friend bought a Ruby in 1978 with a 5.625 CWP and it was awful! 45mph flat out but went up hills well. The change in ratio made a dramatic difference.
So your van axle may have started life on a car or had its internals replaced in 1952 or another myriad of reasons as to why it's apparently incorrect now.