Pulling Power
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From: Ohio
Pulling Power
I HAVE A 93 E-150 CONVERSION VAN, 5.0 AOD WITH A 3.55 REAR END. I NEED MORE POWER WHEN TOWING MY APROX 5500# CAMPER. ? IS WOULD CHANGING THE REAREND TO A 4.10 OR EVEN A 4.30 BE THE BEST BET FOR TOWNING? ANY IDEAS WOULD BE GREAT! THANKS MARK
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From: Detroit Subs
Re: Pulling Power
Originally posted by mark45840
I HAVE A 93 E-150 CONVERSION VAN, 5.0 AOD WITH A 3.55 REAR END. I NEED MORE POWER WHEN TOWING MY APROX 5500# CAMPER. ? IS WOULD CHANGING THE REAREND TO A 4.10 OR EVEN A 4.30 BE THE BEST BET FOR TOWNING? ANY IDEAS WOULD BE GREAT! THANKS MARK
I HAVE A 93 E-150 CONVERSION VAN, 5.0 AOD WITH A 3.55 REAR END. I NEED MORE POWER WHEN TOWING MY APROX 5500# CAMPER. ? IS WOULD CHANGING THE REAREND TO A 4.10 OR EVEN A 4.30 BE THE BEST BET FOR TOWNING? ANY IDEAS WOULD BE GREAT! THANKS MARK
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Joined: Oct 2002
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From: Venice, FL
I tow about 6500# with 351 and 3.55 (e4od no overdrive) and get about 8 mpg.
If I had to change something I would at least go to 3.73 or 4.10 rear. The e350 v-10 I got to drive had a 3.73 in it and it was just about right.
You can tow anything if you have the right ratio but you have to live with it .
I don't know if you can shut off your OD in AOD but you definitly need to do at least that
If I had to change something I would at least go to 3.73 or 4.10 rear. The e350 v-10 I got to drive had a 3.73 in it and it was just about right.
You can tow anything if you have the right ratio but you have to live with it .
I don't know if you can shut off your OD in AOD but you definitly need to do at least that
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Joined: Jan 2004
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From: The KeyStone State
Changing the rearend to 4.10s would be desirable.
Assuming a tire size of 235-75R15(29")
And running in D position
You'd be spinning around 3300 rpms at 70 MPH
about 2850 at 60 MPH.
Not accounting for torque converter slip.
You'd be keeping your engine at its happy spot.
Assuming a tire size of 235-75R15(29")
And running in D position
You'd be spinning around 3300 rpms at 70 MPH
about 2850 at 60 MPH.
Not accounting for torque converter slip.
You'd be keeping your engine at its happy spot.
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Joined: Oct 2002
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From: Venice, FL
I just installed a tach in my van and it is very interesting.
I like to run it at 70-75 mph towing. The motor spins sbout 3,000 with OD off which is a little high for my taste. It spins about 2200 with OD on at 75 mph. I thisnk the sweet spot for my motor is about 2500. Now if I can calculate that back I will let you know as far as what rear ratio I would like.
I like to run it at 70-75 mph towing. The motor spins sbout 3,000 with OD off which is a little high for my taste. It spins about 2200 with OD on at 75 mph. I thisnk the sweet spot for my motor is about 2500. Now if I can calculate that back I will let you know as far as what rear ratio I would like.
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From: Venice, FL
I got it. I would need 4.10 to get it to spin 2538 rpm in OD
3.73 would spin about 2308 (not enough)
3.73 would spin about 2308 (not enough)
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From: Detroit Subs
Originally posted by paradiddle
I just installed a tach in my van and it is very interesting.
I like to run it at 70-75 mph towing. The motor spins sbout 3,000 with OD off which is a little high for my taste. It spins about 2200 with OD on at 75 mph. I thisnk the sweet spot for my motor is about 2500. Now if I can calculate that back I will let you know as far as what rear ratio I would like.
I just installed a tach in my van and it is very interesting.
I like to run it at 70-75 mph towing. The motor spins sbout 3,000 with OD off which is a little high for my taste. It spins about 2200 with OD on at 75 mph. I thisnk the sweet spot for my motor is about 2500. Now if I can calculate that back I will let you know as far as what rear ratio I would like.
if 3.55 = 3000
2.96 = 2500
I don't recall a 2.96 ratio, but something close should work.
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Joined: Oct 2002
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From: Venice, FL
I was trying to calculate what it would take to do 70 mph with OD on so that I could spin the motor less (less than 3000 but more than 2200 rpm). At 2200 it wants to shift too much and it's out of its powerband for pulling.
3000 rpm w/ 3.55 = 70 mph or 845 rpm axle speed
to back figure 845 x 4.10 x .71 (OD ratio) = 2529 rpm. bingo!
a nice compromise.
But to save 2 mpg to change the ratio probably not worth it to me. I'll keep the OD off and run it at 3000 to make my 70 mph.
3000 rpm w/ 3.55 = 70 mph or 845 rpm axle speed
to back figure 845 x 4.10 x .71 (OD ratio) = 2529 rpm. bingo!
a nice compromise.
But to save 2 mpg to change the ratio probably not worth it to me. I'll keep the OD off and run it at 3000 to make my 70 mph.
Junior User
Joined: Jul 2003
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From: virginia
3000 is the sweet is closer too your sweet spot than 2500 is. As your motor makes full power closer too 4000 rpm torqe is somewhere between 2800 too 3400. that is also about where the older trucks ram normally.
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