I love my 85 pickup, but I hate that it is turning close to 3500 RPM at 75 MPH. I know, the truck was geared to be the most efficient at 55 MPH which is closer to 2500 RPM. I would like it to be closer to that RPM at today's speeds. I have 205/75-14's which is a 26 inch tire.

Did Toyota ever make gears for these trucks that were higher than 4.10's, or did they make a trans with a better OD? They're only a 15% overdrive (.851) which doesn't help enough. The tallest tire I could find in a 14 was a 27 inch, which would help but not a whole lot. Truck has basically new tires on it as well, so I would hate to change them.

It still gets 29 running at 75 MPH, but I hate that I'm revving the piss out of it to do so.

Anyone have any info?

Thanks!

 

2wd automatic 2nd gen trucks/4runners had 3.90 gears. I ran one for awhile. Don't remember the actual RPM drop, but I ended up using 4th gear more (31" tires). It was fine on acceleration.

 

Toyota fitted a 5 lug 8" axle for 4 speed 2wd trucks that came with 3.07 gears (G662). This would net 2352 RPM's @ 70MPH with your current tire/rim combo. Only issue is it may be a dog off the line and require smoking the clutch from a standstill on hilly terrain.

BTW, the axle needs to come from an 84-88 model. Older 8" diffs have shorter axle shaft widths and while newer ones have longer axle shafts.

 

3500 is high? That's where i cruise on the highway. 3000-3500 is where the power is.
29mpg?? I'm getting 14.

 

+1

22RE's like revs!

Sounds like you have a two wheel drive, so it's doesn't exactly translate, but I don't think any of my 4x4's could have maintained 70mph at under 2.5k rpms. No matter the gearing or tire size, there is just no power down there.

I'm on 35's and 5.29s, I pull around 19.5 out of a tank at 70mph (corrected). If you're getting 29 out of yours that sounds like a happy engine and I wouldn't worry about the revs.

 

i would jack the rear end up, chalk the driveshaft and one of the tires, then count revolutions for ds vs. tire... see what rear end gearing you have, then decide.

 

2wd I bet it would be easy to find a aftermarket overdrive unit.

29mpg I would be happy with 15mpg

I am pretty sure I never had a 22R series engine in a 4x4 over 60 mph

Celica`s would be a different story I plead the 5th.

 

Go to a 15" rim and your rubber gear options open up dramatically