Buying a 1995 ford fseries(450)

[cougarcub]

What info can you guys give me about this truck as in the 10 lug bolt pattern size axles gear ratios that kind of stuff and also what to check for on the engine had plenty of idis but this will be my first power stroke.

 

[u2slow]

4.63 or 5.13 ratio in the Dana 80. 37 spline. 4-wheel disc. Hydroboost brakes. Parking brake is on the back of the transmission. I-beam front suspension of leaf springs.

Edit: check the relief valves when changing the oil filter. They had come loose on my '95. Put in a superduty one where the reliefs are held by proper snap rings.

 

[cougarcub]

4.63 or 5.13 ratio in the Dana 80. 37 spline. 4-wheel disc. Hydroboost brakes. Parking brake is on the back of the transmission. I-beam front suspension of leaf springs.

Edit: check the relief valves when changing the oil filter. They had come loose on my '95. Put in a superduty one where the reliefs are held by proper snap rings.

Are those the only two gear ratios I know they are heavy duty trucks but that’s seem excessive for a zf5

 

[cougarcub]

Also wdym by 37 spline

 

[IDIBOBS]

Are those the only two gear ratios I know they are heavy duty trucks but that’s seem excessive for a zf5

The rear ends have nothing to do with the transmissions. The point of rear gears is number 1 match tire size and number two create torque at the wheels. Gears multiply tq. That is why many times mpgs actually go up with lower gears. More tq to the ground. Imagine how much longer a clutch will last with lower gears.

 

[cougarcub]

How would the mpg go up with lower gear ratios when the engine is running at higher rpm’s to run 55 mph to 70. I know these trucks arnt ment to go fast but I’d like to at least do the speed limit with out screaming down the road. Because my 89 has a zf5 and 4.10 rear and it sits at 2000 rpms at 55 so I can only imagine a lower gear ratios having higher rpms at higher speeds suckin more fuel

 

[KansasIDI]

Yes, 5.13s and 4.63s are the only options for an F-Superduty. Supposedly in 97 there was a 4.30LS option but I’ve never seen one. The E4ODs were slightly different in the accumulator and valve body regardless of engine type and had a different TCM with the IDIs than the other trucks. The ZF5s received no change for these trucks, until 96 just like the smaller trucks.

Most of the F-Superduty trucks have derated engines, both the IDIs and PSDs. Not all though.

Lug pattern size is 10x7.25”

Good luck finding spare or different wheels…

 

[u2slow]

Also wdym by 37 spline

Axle shafts.

 

[IDIBOBS]

How would the mpg go up with lower gear ratios when the engine is running at higher rpm’s to run 55 mph to 70. I know these trucks arnt ment to go fast but I’d like to at least do the speed limit with out screaming down the road. Because my 89 has a zf5 and 4.10 rear and it sits at 2000 rpms at 55 so I can only imagine a lower gear ratios having higher rpms at higher speeds suckin more fuel

Lower gears let you upshift faster, they put less strain on the clutch so it stays ingaged better and lasts longer. You can climb hills in higher gears. The only time in actuall use mpgs go down with lower gears is when your driving fast in the open flat highway. Auto or manual this holds true. Plus everything else lasts longer so less wear and tear =less money spent on maintenance. I’ve been building, classic cars, off road and tow rigs for 30years. I’ve never once had a customer say they wish they had gone higher gears. Gears are the number one over looked and misunderstood thing in the car/truck world.

 

[KansasIDI]

Lower gears let you upshift faster, they put less strain on the clutch so it stays ingaged better and lasts longer. You can climb hills in higher gears. The only time in actuall use mpgs go down with lower gears is when your driving fast in the open flat highway. Auto or manual this holds true. Plus everything else lasts longer so less wear and tear =less money spent on maintenance. I’ve been building, classic cars, off road and tow rigs for 30years. I’ve never once had a customer say they wish they had gone higher gears. Gears are the number one over looked and misunderstood thing in the car/truck world.

If that’s what you think then you should try a truck with 5.13s. You’ll change your tune, there is such a thing as too deep of gears. Especially if you need to drive any distance. That’s tough on fuel economy.

There’s a reason 4.10s are so common, they’re a great compromise.