Your trucks Allison transmission randomly going into limp mode or neutral? There is a chance its because of an invalid speed input from your transfer case speed sensor. On trucks with badly worn transfer cases its not uncommon for this tone ring and speed sensor to collide. This collision will damage both the speed sensor and the tone ring.
Replacement 49 spline tone ring for 261XHD and 263XHD transfer cases. Always inspect this ring for damage during transfer case service. Any imperfections in the teeth can lead to invalid speed readings and transmission operation.
WILL NOT WORK ON GAS TRUCKS WITH 38 SPLINE MAINSHAFTS
49 Internal Splines (1.92" I.D.)
40 Tooth Outer
2001-2007 Chevrolet & GMC Trucks
LB7, LLY, LBZ, 8.1L Gas
DHD's transfer case parts come from an industry leading OE supplier and manufacturer. They uphold the same strict tolerances, material and dimensions that you expect for an OE part but at a fraction of the OE price. Buy with confidence!