My 1984 M923 AM General maximum speed is 45 miles per hour.

[carlandedith]

My 1984 M923 has a maximum speed of 45 miles per hour. Is there anyway to make it go faster?

 

[machinist75]

Rocket boosters, or always drive downhill with a stiff wind at your back. But seriously you probably have the 11x20 tires, if you swapped them out for the 14's you will gain some. Mine with the 14's will go 60 comfortably.

 

[carlandedith]

thanks for the info.

 

[M35A2-AZ]

It should be going a little faster then 45 mph with the 11.00x20's. Should go around 50-53 mph at 2000 rpm.

 

[4XDesign]

You may want to ensure the fact that it's shifting all 5 gears. 50-55 on 11.00's all day long .

 

[armytruck63]

^What he said. What RPM's is the engine turning when you're going 45 MPH? If it's 2100, then you're in fourth gear. If it's something like 1600 RPM, then you're in fifth gear and there is a power issue. Have you changed any filters?

 

[swbradley1]

Moved to the correct forum.

 

[Stonepicker1]

Change the fuel filter first.

Have you cleaned your tank, take a look inside.

I have the filters for sale in the classifieds if you want some.

 

[quickfarms]

Is that stenciled on the dash?

 

[patracy]

You may want to ensure the fact that it's shifting all 5 gears. 50-55 on 11.00's all day long .

And also make sure you're not counting the converter lockup as a gear.

 

[Tow4]

It should run 55 easily.

When I got my M929 and first hit the interstate, it ran right up to 60+ mph with no problems. I'm thinking this will be a shorter return trip than I thought. Then I noticed the tach slowly going over 2300 rpm. I realized the tach was dragging so I slowed down to 55~57 mph for the rest of the trip.

 

[patracy]

NHC250's will turn up to 2300 if you push them, but they're not happy doing that. 1600-1800 is the sweet spot for them really, when it comes to longevitiy and economy.

 

[OilfieldRoughneck]

It should be going a little faster then 45 mph with the 11.00x20's. Should go around 50-53 mph at 2000 rpm.

Agreed. Both 923's I had would do 55 mph at 7000ft

 

[juanprado]

Mine ran 59mph at 2100 rpm no problem on Interstate with the 1100 duals. I have 395's now and can get 64-65 on Interstate.

Something mechanical in transfer case, tranny, or rear ends. Check temps and fluids. 45mph is not right

 

[98G]

Rocket boosters, or always drive downhill with a stiff wind at your back. But seriously you probably have the 11x20 tires, if you swapped them out for the 14's you will gain some. Mine with the 14's will go 60 comfortably.

mine with 11.00R20's runs 60 no problem...

 

[98G]

I suspect fuel problem or Rev limiter misadjusted

 

[Csm Davis]

Also make sure you are in high range, the transfer case lever should be down .

 

[jerry v]

check thr speedometer could be off use gps

 

[The HUlk]

Low engine compression due to leaky head gasket(s), piston rings, valve seats or guides, etc. would cause a loss of power which may result in a lower top speed.

 

[carlandedith]

Thank You for all the information. Definitely going to check and see if I am hitting the right gears.