I have a 1999 Wrangler with a Dana 30 front axle. I originally replaced my transmission seal with a Yukon YMS4434V that Revane said it was that he would fit. It fits, but the seal broke after a year. When I ordered a replacement, Revain had 2 Yukon seals that fit my Jeep. I went to the Yukon site to confirm this and the other was for 2001+ TJ. This one is slightly larger than the other and fits perfectly. I don't know if size matters, but I used Yukon's recommendation.