|There are going to be certain requirements and
limitations to this much overdrive. Your truck will need to have enough
power for the higher gear ratio. To accomplish this, you will need
to install a pyrometer (exhaust temperature gauge) and turn the fuel
up to max safe level of 1200°F pre-turbo which will make about
14 psi of boost. This will give you good performance and enough power
to run at 65-67 mph.
This OD ratio is intended for trucks that are used mostly on nearly
level roads, and with stock size tires. 9.00x20, 11.00x20, and 14.5R20
are considered to be stock sizes. Some hills and rolling terrain will
be ok, but not anything over a 7% grade for any distance. Load on
level roads mostly affects braking.
In addition you will want to have safe brakes and tires.
If you have any questions, or want to order a kit, please call us
at (410) 549-6649. Thank you very much!