I'm not sure exactly what kind of mileage mine gets since my odometer is off, but I *think* it's somewhere around 9 town, 15.5 highway. Far cry from 24, huh?

 

Well, I get my 14-16mpg on backroads where I can cruise an easy 20-30mph or around there. 55mph probably gets around 9-10 mpg for me, but I'm running between 2200-2300 RPM. I think my manual transmission helps my gas mileage on the backroads. Between being able to stay around 1000RPM and also coast in neutral sometimes, I get good gas mileage in certain cases. I go 2nd through 4th by 20mph, and only use first to screw around in. I have never 'needed' first unless off road and want to make a bumpy trail feel smoother by crawling through it.

My gas mileage is never good on the highway, though. It's just awful going down the highway. 45mph is about the limit for moderate gas mileage (probably 12-13mpg) in my truck with my gearing. 55mph and above just sucks it down.

 

I hear ya. You're lucky with the manny. My E40D seems to rob power and mileage. I can kind of control it cruising around town - if I want to, I can shift my truck before 2,000 in 1st and 2nd and cruise at 30 mph@1,000 rpm with od on, or 1,500 with od off. It's when I hit 45 on up the rpm's begin to climb. I'm going 2,100 rpm or so at 60 mph. I can hold at 70 all day long but it feels like my truck is screaming. Maybe it's not, but it just feels that way to me.

 

My 79 carbed 300 would gets 15MPG at 55 MPH all day long, provied everything is tuned just right. It takes a fair amount of attention to keep it tuned just right.

The 79 is 4x4 with 4 speed manual NP435.

Now my 92 F250 has 4.10s and a 5 speed ZF that will get 17 MPG if I behave myself. I hate to run it much past 70 or not for long times.

 

where do you find those 5 speeds lol... i do like the ratios in my t170... i just want a gear so low that i dont need to use my clutch... but im guessing i either get a posi rear with bad highway miles or a non posi rear with good highway miles

unless im tring to spend money LOL

 

What are you talking about? Just put an auto locker in your rig.

 

sorry i know nothing about rear wheel drive set ups... link me? lol

 

I have a powertrax no slip automatic locker in my rig, I recomend this. Cost about the same price as a limited slip. Only thing is, it's dangerous if you get a flat tire and change one tire for a smaller one. With both tires locked and one tire is smaller than the other, it can grenade your differential. On the plus side a locked rig is pretty capable. My rig is just a 4x2 but it'll go just about anywhere a non-locked 4x2 can't. I ordered my locker from a Jegs magazine.

 

i want a locker but im just gonna save my coin and get a selectable the shop i work for has really good ties with almost every auto/machine shop in town when i did my t-case chain its list price was $300 cdn i paid $130 cdn and change with tax Jammin ... so yeah a selectable will run probly $900 but i could probly get it for $700 maybe less

 

i want a locker but im just gonna save my coin and get a selectable the shop i work for has really good ties with almost every auto/machine shop in town when i did my t-case chain its list price was $300 cdn i paid $130 cdn and change with tax ... so yeah a selectable will run probly $900 but i could probly get it for $700 maybe less

 

im sorry i was trying to edit my first post and it did that so my bad how do you delete posts?

 

so whats the difference between posi and a locker? my friend is giving me his 8.8 4.10 posi rear for the open rear out of my truck he said it was posi all the time.... like it was set up tight when it was put together

 

ahaha, I am gonna raise the BS flag on a Dodge cargo van getting 50 mpg. No way, no how is that gonna happen with a 318

 

my dads 95 F-150 sees an average of 18 mpg 50/50 mix driving but he doesnt fly with it, but he doesnt baby it. that is with the A/C on doing the speed limit with a bone stock engine but with everything working properly. mine on the other hand, i get about 12 on average but im not really concerned with the milage. if i was i wouldnt have 33s, stock 3:55s gearing and drive like a normal mid 20 yr old

i can see a 300 getting 24-26 mpg in a stripper truck with a manual trans and overdrive with 2.87 gearing doing the speed limit. quite a few people on FSP are reporting 20+ mpg with thier trucks.

 

posi, limited slip, trac lock are all limited slips. a locker has both tires turning all the time, a limited slip applys limited power to one side when traction is limited.