1995 Chevy Camaro Transmission upgrade or Rear Diff gear ra

FREIGOOSE

MEMBER
1995 CHEVROLET CAMARO
6 CYL
2WD
MANUAL
17,400 MILES

Trying to improve MPG. I can drive 62 mph and get 27-30 MPG keeping the RMP at 2k or less. I have a 5 speed manual, to improve over all hwy MPG would it good to install a 6 speed (though I understand it can be quite challenging) or changing the rear gear ratio? The idea is to keep the RPM's low to keep HWY MPG lower at a greater speed. Does my V-6 have enoght tourqe for a 6 speed?

Tuesday, June 23rd, 2009 AT 2:33 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Actually, you are doing really well with MPG. Regardless, if you live in an area that is mostly flat, I would recommend changing the differential gear ratio if something is available. If you live in an area there are a lot of hills, I would leave it alone. It may struggle with the hills. Also, keep in mind, if the engine has to work harder to accellerate and maintain highway speed, the fuel mileage will drop. Perfect example, I have a Dakota with the V6. My father has the same truck with the same axle ratio but with the V8. He gets about 5 miles to a gallon better than me because the engine has more power and doesn't need to work as hard.

Just some food for thought.

Joe

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Friday, July 3rd, 2009 AT 6:33 PM