New trans
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I'd love to go to a diesel but I'm on way to tight of a budget. My thought is that if the motor is running at its best, throw a set of headers on and give it a few more gears to run though, then I might be able to get even 15-17 mpg, not towing. Am I dreaming with that thought process??
20% under the best conditions puts you at 13-14, maybe.
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There is more to getting that mpg than a trans with OD. This I know and understand. Thank you.
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Hi everyone,
I have a 1988 F-250HD 2x4 with an EFI 351W. I tow a 24' 5th wheel in Colorado. This truck is great but I need it to tow more efficiently and, if possible, get better than 11 mpg. It has a 3 speed auto trans in now. I'd like to put a super duty 5 speed with O/D. I would like to know what trans would fit? Any modifications that may need to be done? And will it make a big enough difference in drivability and mpg?? Thanks for the help.
I have a 1988 F-250HD 2x4 with an EFI 351W. I tow a 24' 5th wheel in Colorado. This truck is great but I need it to tow more efficiently and, if possible, get better than 11 mpg. It has a 3 speed auto trans in now. I'd like to put a super duty 5 speed with O/D. I would like to know what trans would fit? Any modifications that may need to be done? And will it make a big enough difference in drivability and mpg?? Thanks for the help.
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I compute my mpg every time I fill up. I am consistently getting 11mpg. mpg isn't my only concern. The last owner didn't take care of the truck, so it needs some TLC despite mpg. Do you know anything about compatibility of E40D/4R100 trans going into it, replacing its C6?
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The 4R100 would have a different bolt pattern but you could go with an E4OD out of another small block `91 or earlier.
You could get the stock computer and trans wiring harness from the donor to run it and the engine or you could keep your existing computer to run the engine and buy a stand alone controller for the trans.
However I would still think an overdrive unit bolted to the C6 would be the way to go, especially as you have a 4x2.
You could get the stock computer and trans wiring harness from the donor to run it and the engine or you could keep your existing computer to run the engine and buy a stand alone controller for the trans.
However I would still think an overdrive unit bolted to the C6 would be the way to go, especially as you have a 4x2.
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The 4R100 would have a different bolt pattern but you could go with an E4OD out of another small block `91 or earlier.
You could get the stock computer and trans wiring harness from the donor to run it and the engine or you could keep your existing computer to run the engine and buy a stand alone controller for the trans.
However I would still think an overdrive unit bolted to the C6 would be the way to go, especially as you have a 4x2.
You could get the stock computer and trans wiring harness from the donor to run it and the engine or you could keep your existing computer to run the engine and buy a stand alone controller for the trans.
However I would still think an overdrive unit bolted to the C6 would be the way to go, especially as you have a 4x2.
Post Fiend
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Gear Vendors under/overdrive transmissions the most awarded auxiliary transmissions. Click on this link for some info.
You could probably pick up a used one for a C6 without too much trouble.
Even if your C6 fails at some point they are cheap to rebuild (fraction of the cost of rebuilding an E4OD). Also the C6 is a strong trans and will last if properly looked after. Maybe consider a fluid change at some point.
You could probably pick up a used one for a C6 without too much trouble.
Even if your C6 fails at some point they are cheap to rebuild (fraction of the cost of rebuilding an E4OD). Also the C6 is a strong trans and will last if properly looked after. Maybe consider a fluid change at some point.
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Gear Vendors under/overdrive transmissions the most awarded auxiliary transmissions. Click on this link for some info.
You could probably pick up a used one for a C6 without too much trouble.
Even if your C6 fails at some point they are cheap to rebuild (fraction of the cost of rebuilding an E4OD). Also the C6 is a strong trans and will last if properly looked after. Maybe consider a fluid change at some point.
You could probably pick up a used one for a C6 without too much trouble.
Even if your C6 fails at some point they are cheap to rebuild (fraction of the cost of rebuilding an E4OD). Also the C6 is a strong trans and will last if properly looked after. Maybe consider a fluid change at some point.
Post Fiend
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Also remember that you would also need the E4OD torque converter.
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From: CASA GRANDE AZ
with all that you are thinking about doing you might be better off finding a different truck or just overhauling what you have now ! as for the engine you might think about change it over to a MASS AIR FLOW unit , then you can build some power into it !
check those gears out in the rear , if they are 4.10 then switch them to 3.55 !
check those gears out in the rear , if they are 4.10 then switch them to 3.55 !
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with all that you are thinking about doing you might be better off finding a different truck or just overhauling what you have now ! as for the engine you might think about change it over to a MASS AIR FLOW unit , then you can build some power into it !
check those gears out in the rear , if they are 4.10 then switch them to 3.55 !
check those gears out in the rear , if they are 4.10 then switch them to 3.55 !