Good morning! I removed my T15 for rebuild and found that the top cover was broken. I found a replacement but my friends at the USPS seem to have misplaced it for the last couple of weeks. As I start to accept the reality that it may not turn up, I'm looking at other options. My first choice would be to find a good T15 top cover since I have already purchased rebuild parts for my T15. There is a T150 available locally which is priced cheap. I'm starting to look at it as a possible replacement option. My intended use doesn't require a low-first four speed or anything bomb-proof - mild off-road (forest roads & beach) and runs into town for ice cream mostly. Anyway, I'm not a transmission expert by any definition. I'm looking at Novak's site and comparing info and could use some help deciphering. I've pasted the relevant info for the T15 and T150 transmissions below. The difference in length and the difference in input shaft suggest that it is not a direct bolt-in swap with no other mods. Can anyone confirm? The input shaft differences jump out at me as being a problem. Thanks for any input/insight! T150 The T150 transmission is 9" (or 9.25” per the “at a glance” image) long and features a cast iron top cover that is retained by eight bolts. The Jeep T150 has a 1-3/8" x 6 spline output shaft for mounting the transfer case input gear. The transmission has a 7-1/2" input shaft (stick-out length) with 1-1/16" x 10 splines and a neoprene front seal and cast iron bearing retainer. The pilot tip is ~17mm. Gearing: 2.99, 1.75, 1.0, Rev. 3.17 T15 The T15 transmission is 10" long and features a cast iron top cover that is retained by 8 bolts. The Jeep CJ T15 had a 1-1/8" x 10 spline input shaft (or "clutch shaft") with an ~8-1/2" stick-out length and its pilot tip is ~3/4" in diameter. The T15 transmissions as found in Jeeps has a 1-3/8" x 6 spline output shaft for mounting the transfer case input gear. Gearing: 3.00, 1.83, 1.0, Rev. 3.00.