lifted mileage

[JimmyJuneau]

Ok if I lift my truck 4 inches and add 35s or 33s is it going to affect my gas mileag? I am planning on keeping the stock gears is that ok? or do I need to change them if I get bigger tires?

1985 GMC JIMMY

 

[Pugsley]

My mileage actually improved with 4" and 33's - I've got stock 3.73 gears. In theory though, you should probably expect to see a small decrease in mileage.

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[tRustyK5]

I'll add to that...

Ideally 4.10's should be used with the 700R-4, but if you already have 3.73's you should be OK as long as you don't plan on using OD in town a lot.

Mileage can be kinda funny too. The best mileage I ever got was with 33" MT's and 2.73 gears...but it was a long highway only trip. Oh and that was lifted 4" as well. I managed 17.4 MPG...that is with a 4 speed manual.

Now with another inch of lift and 36" Swamper TSL's I get about 13.2 MPG highway...withe the same tranny and 3.73's

Rene

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[84_Chevy_K10]

I get 10-12 MPG with a 700R4/4.10 gears. I have a 305, but it's built beyond the performance level of a stock 350. I have 35" BFG M/Ts.

The reason I have no clue how many MPG I get is after the tire and gear change, my speedo is so inaccurate I don't have a clue how far I've traveled before I fill up again.

Tim
'84 Chevy K10, lifted, loud, fast, and 3/4 ton axles