Posted by Silentpardner on 10/04/15 - 3:26 PM
#13
I recommend you investigate the possibility of a differential final drive gear ratio change. Possibly changing to a 4.10 or similar gear set would provide your existing truck with the added bottom end to make it a satisfactory tow vehicle. That would certainly be your least cost option.
Very sensible comment. The truck you have CAN be made to accomplish your goals, as long as you are happy with the rest of the truck as it is. Lowering the drive axle ratio will increase fuel consumption.
Another thing you should look into is your truck's ECM programming. Your 1999 chevy has one, and it is programmable. There are many aftermarket programmers that are available, and there are many shops right around you that specialize in this type of engine/transmission ratio tuning for your current truck. Depending on the severity of the problem you are having, this might just be all you will need to do. That Chevy 350 is a real workhorse. :) I had a 1999 Chevy Tahoe with that engine, 280 or 285HP, I can't remember, that went 110000 miles before I got rid of it. I used it to tow the Outrage 18, and after modifying the program in the ECM, it was fine. The Fords now have a switchable programming feature that is included as "Tow/Haul" mode that only changes the programming of the ECM when engaged, and it does make a significant difference when activated while towing.
If you must have a new-to-you truck due to factors unrelated to pulling your boat, just take your boat with you when you go to look at potential replacements, hook it up to the candidate, and try it out :)
Edited by Silentpardner on 10/04/15 - 4:14 PM