regear or replace?
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Joined: Dec 2007
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regear or replace?
i just got my truck on the road yesterday and i have found out that i can only get up to 80km @ 2000 rpm. the truck is a 1968 F-250 4x4, 360, np435, dana 24, dana 44 front and a dana 60 rear with 4.10 gears. i dont want to regear the diffs, but does someone have a kit than gears the transmisson? i have seen overdrive units but i dont like the price of them (just spend $2600 rebuilding the motor). if there is no kit to regear the transmission, what other transmission will fit in than has an overdrive gear in it?
any ideas will help
any ideas will help
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Not sure what it takes to fit a late model 5spd(bellhousing). Not sure how cheap that route will be either.
Pretty sure they don't offer any kind of gear changes for original tranny.
Bolt on overdrive's aren't cheap, but not sure how well it works for 4wd versions? You have divorced case right? Probably no room for unit anyway.
Pretty sure they don't offer any kind of gear changes for original tranny.
Bolt on overdrive's aren't cheap, but not sure how well it works for 4wd versions? You have divorced case right? Probably no room for unit anyway.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
hey 80kn is about 50 mph right? If you are turning that at 2 grand, that is not bad at all.
I turn 2050 at 55 mph with my 3.00 gear,
You have to set it up one way or the other, do you want to pull stumps or get mpgs?
John
I turn 2050 at 55 mph with my 3.00 gear,
You have to set it up one way or the other, do you want to pull stumps or get mpgs?
John
Super Moderator
Joined: Apr 2004
Posts: 34,466
Likes: 2,798
80k/hr approx 50 mph
http://www.onlineconversion.com/speed_common.htm
With your gears, you must have approx 34 inch tires to turn 2000 rpm at that speed.
http://www.novak-adapt.com/knowledge/gearing.htm
If that is all correct, that is about 2633 rpm at 65/mph-105kph. Not screaming,yet.
If you want OD, the GV unit is about $3000, you may know about it.
http://www.gearvendors.com/
Or a 5 speed. It wouldn't make sense to try to fit a ZF from a late model Ford into your truck. The integral bell would require an adaptor, them ain't cheap. Enter the NV4500. Scroll down here:
http://www.motivegear.com/tech_info/tranny_guide/tranny_guide.html
This outfit has info and sells them and the adaptor. (bell to trans adaptor, well, it's marginally better than bell to engine...)
http://www.high-impact.net/nv4500.htm#NV4500ConversionsFordTruck
They also sell and OD between the bell and trans, about half the cost of the GV, but do some homework, I've seen some negative comments about these:
http://www.high-impact.net/transmiss...roverdrive.htm
So, with the NV4500 tucked under your truck, 5th is now .73 which will give you:
1480 rpm at 50 mph/80Kph
1922 rpm at 65 mph/105kph
These are just links I've found, I know NOTHING about them other than the obvious, so assess carefully.
Good luck.
PS please tell us you put a 390 crank/rods/pistons in that slug of a 360....
http://www.onlineconversion.com/speed_common.htm
With your gears, you must have approx 34 inch tires to turn 2000 rpm at that speed.
http://www.novak-adapt.com/knowledge/gearing.htm
If that is all correct, that is about 2633 rpm at 65/mph-105kph. Not screaming,yet.
If you want OD, the GV unit is about $3000, you may know about it.
http://www.gearvendors.com/
Or a 5 speed. It wouldn't make sense to try to fit a ZF from a late model Ford into your truck. The integral bell would require an adaptor, them ain't cheap. Enter the NV4500. Scroll down here:
http://www.motivegear.com/tech_info/tranny_guide/tranny_guide.html
This outfit has info and sells them and the adaptor. (bell to trans adaptor, well, it's marginally better than bell to engine...)
http://www.high-impact.net/nv4500.htm#NV4500ConversionsFordTruck
They also sell and OD between the bell and trans, about half the cost of the GV, but do some homework, I've seen some negative comments about these:
http://www.high-impact.net/transmiss...roverdrive.htm
So, with the NV4500 tucked under your truck, 5th is now .73 which will give you:
1480 rpm at 50 mph/80Kph
1922 rpm at 65 mph/105kph
These are just links I've found, I know NOTHING about them other than the obvious, so assess carefully.
Good luck.
PS please tell us you put a 390 crank/rods/pistons in that slug of a 360....
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