rear wheels dragging causing terrible mpg?

jacked truck up, spun each rear wheel they spin for about 1 or 2 seconds then stops feels like they are a little stuck how can i post a video here?

 

When the rear wheel spins, it does a lot.
It spins a bunch of other things, 1-2 secs is about right.
I mean, it should stop pretty quick with all the components drag.
Axle, spider gear, ring gear, driveshaft…….


A video would certainly help.

 

That sounds about normal. The diff gears are going to slow it down, they aren't supposed to spin freely. If you don't hear the rear shoes dragging, it is probably fine.

Best way to post a video is to upload it to YouTube, copy the link and hit the icon that looks like film, and paste the link.

 

i’ll get you guys a video hang on i’ll link it

 

i’ll get a video one second

 

https://youtube.com/shorts/i7d0VLBm_nU?si=qPDeVm0b4eH7plvr

 

https://youtube.com/shorts/i7d0VLBm_nU?si=qPDeVm0b4eH7plvr

 

How bad is the gas mileage?

 

Looks normal to me. Winter gas and heavier tires may be affecting you some. But yeah, what kind of MPG loss are we talking?

 

Look normal to me.

 

i get like 11mpg you can go see my other post aswell i need to check my o2 sensors because my exhaust is shot

 

okay thanks man

 

like 11 mpg im guessing from my o2 sensor then because my exhaust has like 6 leaks, no muffler and was throwing a code but it’s gone now
im waiting to get my obd scanner from Amazon so i can check the air fuel ratios

 

If you have an exhaust leak, the A/F sensor could being seeing a lean condition.
In return, it will pour fuel to the engine to "compensate".
But all that is speculation until we get the actual codes.

No matter what, any leak before the converters, needs to be fixed.

 

i think there’s a leak after both air fuel o2 sensors, like the piece that joins the upper cats to the pipes after the cats in between there

 

there’s no leaks above the 2 cats coming down from the engine

 

Yeah, I just read through your other thread. Your brakes aren't dragging. I'd focus on the exhaust leaks.

 

If you have doubts about rear hub operation, inspect the rear brakes.

generic ODB scanners do not provide data.

If your AFR was off, you'd have a CEL.

You have an exhaust leak. The O2 sensors detect this as lean. The ECM compensates by dumping more fuel. Causing worse MPG, among other things.

There is nothing to check. The lifespan of an automotive wear part is 10 years. Your sensors are older than that. Not including an exhaust leak.

 

thanks man, you think changing the sensors would fix it or just fix the leaks??

 

okay thank you brother