I have been pulling a wrangler behind our motor home. I want to upgrade to a little larger vehicle. I am looking at a 2000 jeep grand cherokee limited. In the owners manual it does not say anything about towing it according to the current owner. I have not seen the manual. Is there anyway that this is not a 4 down towable unit?? It has two gear shifts and it is a 4X4. Maybe it just isn't in the older jeep manuals? Help before I buy it!