What kind of rpms are you guys running at highway speeds? I've got to check with my gps again but I think I remember being around 2200-2300 around 60 mph. it feels high to me but I've got 35 inch mt, 3.54 gears, and a nice big flat bed. Any input would be great.

 

hi
sumpins up there !

i get app 2000 at 65 with 265 70 16 ?

what is your fuel milage , maby no lock up ?

 

There is no lock up I've got the A518 trans. I'm not sure of my milage because I don't have an odometer.

 

hi
a 94 should have had a l u trany?

those rpm s sound like 4.10 gear ratio or your convertor is out to lunch ?

 

Tranny is from my old first gen. Positive its not lock up. I'm going to check out the gears again tomorrow just to be sure I'm correct. The trans was rebuilt about 3 years ago and only about 20,000 miles on it since then.

 

Sounds like you're not getting to overdrive.

 

I've got my od wired to a toggle switch and I can feel it shift in and out just fine.

 

2200rpm is probably close without lockup on that A518. I run 1600rpm at just under 60 mph. Can't remember what my gears are. 3. somethin's...

 

1900 @ 75MPH with 33's

 

Ok so I verified tonight that I do in fact have 3.54 gears. took the truck out for a spin with the gps but was not a able to get up to 60-65 for any long steady runs due to traffic. But at 55 I was around 2100-2200. The trans shifted fine through all gears.

 

That seems weird to me. I have 3.54's and I am at 2000/50 mph in 4th/direct drive. IIRC i am around 1900 running 65 mph. (speeds are indicated)

I realize you are losing some in your torque converter, but I wouldn't have thought that much.

The following link will give you a rough idea where you should be.
http://dodgeram.org/tech/specs/axle/rpm_vs_mph.htm

 

My truck with 3.54 runs a little over 1600 rpms at 55.

 

My truck with 3.54 runs a little over 1600 rpms at 55. and 2000 rpms at 75 mph

 

I have 4.10's in my truck with 215/85/16's and at 70 I am at 2300 - 2400 rpm. If you have a non-lock up I would say your TQ is not doing its job very well.

When you rebuilt your trans did you replace your TQ?

 

That is roughly my RPM when I am in 5th (direct) with 33" tires. I still say you're not getting into OD, or your converter is absolute garbage.