How hard is it to rebuild a mazda m5r1 trans for an average diy'er? Have an 89' 2wd ranger with a 2.9l v6. Can't find a used one under $750. Shops want $900 to rebuild it even though I already have out. Looks like it needs new input shaft and cluster gear shaft. I see rebuild kits on ebay for $300 but I have never rebuilt a trans. before. Truck is still in pretty good shape but I hate to spend $1000 on it and salvage yard won't give much for it.