well I have put 5600 miles on it since I bought it and it has a 4speed W/ over drive at least it shifts 5 times so I'm guessing it's a 5 speed

I get almost 22mpg bob tail and 16.2 towing our 30ft 5th wheel

 

4spd, only the newer Hemi 1500's had 5spd autos. The TC lock-up/unlock makes it feel like it's shifting, but it's not.

 

no it starts out in first then shifts 3 more times to 4th and when you get to 45 mph it shifts into overdirive # 5

 

The 48RE is an electronically-governed, four-speed heavy-duty overdrive automatic transmission, stronger than its predecessor, the 47-series.

Gear ratios:
1------2-----3----4-----R
2.45 1.45 1.00 0.69 2.21

Maybe you're experiencing shuttle shift?

45-52mph is TC lock-up

 

Gear ratios:
1------2-----3----4-----Rwhat is the (R) for or deffinition?

45-52mph is TC lock-up / So this is not actually another gear just the trans locking up I don't understand can you give it to me in laymens terms

 

Now you're just being difficult.

(R)everse

2.21 at 50mph would be something like 8-9000RPM's I'd imagine.

EDIT: Actually with 3.73 it'd be 4197RPM's, with 4.11 it'd be 4624RPM's.

 

I'm sorry if I am upsetting not my intention , so it's not another gear sure feels like it

 

No...no...no, just razzin' ya

Your engine/tranny works like two fans, the engine side fan blade turns and pushes fluid against your tranny side fan blade causing it to turn which drives your wheels.

Idling at 6-700RPM's does not allow enough of a flow of fluid to turn the Tranny side fan blade so your able to sit still with out stalling.

TC (Torque Converter) lock-up is a plate that engages at a certain speed/RPM to give you a direct 1 to 1 contact of driving force rather than the fan blades mentioned above.

TC Lock-up is similar to driving a stick when you let off the clutch. It allows for minimal loss of power.

Arbitrary Numbers Example: No lock-up = 75% of engine power gets to tranny, Lock-up equals 97% of power being transferred.

 

Here is an article that will further explain how a Tranny works.

http://www.familycar.com/transmission.htm

 

That artical reminds me of this video

http://www.youtube.com/watch?v=yjXTOlsE8k0


http://www.youtube.com/watch?v=2fjcJ...eature=related