jsomorrow Report post Posted September 19, 2018 I have a 2001 Safari Cheetah on the Magnum Velvet Ride chassis, Cat 3126, Allison MH3000 transmission, hydraulic brakes and Pacbrake. When the engine is started, the red ABS light may be on or off. However, when the transmission is put in gear and the motor home begins moving, the red ABS light will be off. It will stay off for an indefinite time (5 minutes to ??). While the red ABS light is off, the engine retarder (exhaust brake/Pacbrake) is inoperative. When the red ABS light comes back on, the exhaust brake functions normally (exhaust brake switch on and accelerator off above 15 mph, exhaust braking is activated and transmission commanded to 2nd gear and steps down as slowing permits). Also, when the ABS light is out and the exhaust brake is inoperative, the transmission runs hot (about 200 degrees). It appears that when the ABS light is out, the transmission stays in 5th gear, thus the higher temperature (engine RPM is 200-300 higher than normal at highway speeds). When the ABS light is on and the exhaust brake functions normally, the transmission temperature runs normally (about 140 degrees). Local shops are unable to find the problem. There are no codes on transmission or engine ECUs. Any ideas? Share this post Link to post Share on other sites
manholt Report post Posted September 19, 2018 Jsomorrow. Welcome to the Forum! The REV Group got everything Monaco. I would call them and speak to Tech. I think you have a bad probe and they may have the part in stock. Share this post Link to post Share on other sites
rsbilledwards Report post Posted September 19, 2018 Sorry to butt in again Carl, but REV who owns Monaco anad Safari has no interest in we Safari owners nor do they like sharing info. So I suggest you join safarifriends@yahoogroups.com 1,500 some SAFARI owners and some very astute people that maybe able to help. I would also suggest you call Dave Atherton here on the forum as a one on one which he likes better than the forum notations and have a talk about the question. He is master CAT troubleshooter, retired but giving back in a big way. 605 999 0720 Arizona Share this post Link to post Share on other sites
manholt Report post Posted September 20, 2018 Bill E. I was hoping you would come aboard. I was taking a stab in the dark! Share this post Link to post Share on other sites
