Give me speed

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Joined
Mar 23, 2023
Threads
15
Messages
85
Location
TX
I bought a 1971 fj40 with a 4 speed. At 50-55mph it sounds like it is wound up. 1st gear maxes out at about 2 mph. I'm not into rock climbing. What can I do to increase the upper end speed without spending a fortune?
 
Is it in high range?
 
Last edited:
I bought a 1971 fj40 with a 4 speed. At 50-55mph it sounds like it is wound up. 1st gear maxes out at about 2 mph. I'm not into rock climbing. What can I do to increase the upper end speed without spending a fortune?
Is it stock? Pics of truck, truck engine, and undercarriage?
 
For real though, is the transfer case in high?
 
Is it stock? Pics of truck, truck engine, and undercarriage?

20260727_192826.webp


20260727_192750.webp
 
You didn't state what tire size is so I used 29".

"
AI Overview

To calculate your engine RPM with a 4.11 gear ratio and 29-inch tall tires, use the standard formula: RPM = MPH X Gear Ratio X 336 divided by Tire Diameter

Cruising RPM Examples (1:1 Direct Drive Transmission Gear)
    • 55 MPH: ~2,693 RPM
    • 60 MPH: ~2,938 RPM
    • 65 MPH: ~3,183 RPM
    • 70 MPH: ~3,428 RPM"
 
If what you describe isn't exaggerated, it sounds like it's stuck in low range. Have you tried shifting the transfercase at all? How did it compare? Is this the first fj40 you've driven? Looks

If what you describe isn't exaggerated, it sounds like it's stuck in low range. Have you tried shifting the transfercase at all? How did it compare? Is this the first fj40 you've driven? Looks south American.
I'll try lo and Hi tomorrow and report back...
 
You didn't state what tire size is so I used 29".

"
AI Overview

To calculate your engine RPM with a 4.11 gear ratio and 29-inch tall tires, use the standard formula: RPM = MPH X Gear Ratio X 336 divided by Tire Diameter

Cruising RPM Examples (1:1 Direct Drive Transmission Gear)
    • 55 MPH: ~2,693 RPM
    • 60 MPH: ~2,938 RPM
    • 65 MPH: ~3,183 RPM
    • 70 MPH: ~3,428 RPM"

37932099-1971-toyota-land-cruiser-fj40-std.webp


20260727_204657.webp
 
central American import
you just bought it?
did you buy it sight unseen?
no telling what was done to it and what condition things are in
where in Texas are you located?
 
X2^^^ on the shifter location. It looks like it’s in 4H.
 
The tires looks so small, 29” isn’t what it used to be.

The t-case shifter really does look like it is pulled back.
 
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