Have you noticed transmission oil leaking from your Allision 1000? It may be coming from the wiring harness connector on the transmission. Overtime the internal seal in the connector can become damaged and cause transmission fluid to leak from the connector. The experts at Fleece Performance has the solution. This 20-way pin seal is a direct replacement for the hard to find OE seals and includes a replacement O-ring for the connector body and new connector body. This seal kit works on Allision LTC and GM 4T65-E transmissions.