Here is what I have regarding Pass's from England to Utah. I think a lot of the info came from LDS.
JOSEPH PASS Abt 1749 m. Esther Norbury child: JAMES PASS Abt 1789 m. Elizabeth Rowlinson child: THOMAS 21.6.1816 - 2.7.1899 m. Mary Ann Wharmby children: ELIZABETH 1.4.1839 - 31.8.1898 m.HenryHibbard Hawkins, with issue ELLEN 2.3.1841 - 13.6.1913 m. William Stanley, with issue SARAH 5.11.1843 - 14.8.1891 m. James Sykes SUSANNAH 8.1.1845 - 20.12.1923 m. Thomas Worthington in SLC, Utah, with issue JOHN 6.5.1848 - 1.2.1849 MARTHA 20.11.1849 - 29.1.1850 MARY ELEANORE 28.7.1851 - 31.8.1931 m. Herbert Burton in SLC, Utah, with issue RACHEL 6.4.1854 - 25.2.1889 (d. Paragonah, Iron, Utah)m. James Burrows Sr Davenport in SLC, Utah, with issue in 1872. THOMAS 18.1.1855 - 1.10.1938 (d.SLC) m. Euphemie Helen Reid in Nephi Jaub 1879. children: MARGARET 8.2.1880 THOMAS LE ROY 6.9.1881 EUPHEMIE HELEN 18.8.1883 GEORGE VIVIAN 29.11.1885 ALVIN RUPERT 30.11.1888 BERTHA 5.12.1890 LLOYD REID 30.3.1893 GLADYS 24.6.1895 LILLIAN 28.11.1897 RONALD EARL 28.5.1899
I do have more dates, but if these are your relations, I'm betting you have most of this already. If not, I hope you find it useful. I would presume the family emigrated in the late 1850's early 1860's. And just a note- I write my dates dd/mm/yy.