Sparky-(Admin) 19,432 #1 Posted September 10, 2017 Picked up a C-121 last winter, just doing maintenance on her today. Tranny fluid looks like its real old!! 5 Share this post Link to post Share on other sites
stevasaurus 22,229 #2 Posted September 10, 2017 That is not really that bad Mike. I would do a good flush with diesel and maybe 2 flushes...depending on what come out. Shine a light down the shift hole and see what that looks like. Make sure to run the horse through the gears when flushing...about 20 minutes on blocks should do it. 9 1 Share this post Link to post Share on other sites
SylvanLakeWH 24,078 #3 Posted September 10, 2017 Pea soup anyone? 2 Share this post Link to post Share on other sites
squonk 38,842 #4 Posted September 10, 2017 I pulled the top plug on my 701. Black gear oil came out. Pulled the drain plug and nothing came out! Ran a wire up in and it started oozzing out. Flushing in progress as well as a 520 re-wire. 5 Share this post Link to post Share on other sites
Terry M-(Moderator) 2,125 #5 Posted September 11, 2017 8 hours ago, stevasaurus said: That is not really that bad Mike. I would do a good flush with diesel and maybe 2 flushes...depending on what come out. Shine a light down the shift hole and see what that looks like. Make sure to run the horse through the gears when flushing...about 20 minutes on blocks should do it. Like Steve said ...doesn't look terrible. I've drained Brown pudding from a few of the many I've drained.... 1 Share this post Link to post Share on other sites
WHX?? 46,675 #6 Posted September 11, 2017 Could have been worse Sparkeye and come out in clumps...I like Dino's idea 1 Share this post Link to post Share on other sites
