|
Gear Venders makes over drive units for most popular rear wheel drive vehicles and 4wd trucks.
They aren't cheap. For $2000 to $3000 are not economical due to the fact they tend to increase fuel milage by 2 to 3 mpg.
I would rather spend $500 or less doing a rear gear swap, it will deliver almost the same result.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|