Overdrive

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Dec 1, 2007 | 03:41 AM

factory594x4

Thread Starter

Senior User

Joined: Apr 2006

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Overdrive

I am ready to buy an overdrive for my 59' f250 4x4 I6 t-98. Can anyone tell me if it is a np205 t-case? Or what is it. The t-case is mounted in the middle of the frame(divorced from the trans..). So there is a small shaft(about 16") from the trans. to the t-case. Gear vendor says their unit bolts to the rear of the t-case. Won't this make the rear drive shaft too short? How short is too short?

Does any one have any better suggestions? Is there a different unit on the market?

Dec 1, 2007 | 04:48 AM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 787

From: Simi Valley, CA

Transfer Case = 1959/64 F100/250 = Spicer (Dana) 205

Dec 1, 2007 | 07:11 AM

4tl8ford

Post Fiend

Joined: Jun 2001

Posts: 7,493

Likes: 7

From: Erie, pa

What are you wanting/expecting from an overdrive in a 4x4 vehicle? 2 wheel drive only? 2/4 wheel drive?

Dec 1, 2007 | 01:04 PM

factory594x4

Thread Starter

Senior User

Joined: Apr 2006

Posts: 201

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I don't care. It has 4:56 gears And I would like to be able to run on the highway and not lose my off road gearing. I can't go faster than 35mph @4500rpm. Like a DC-10 taching up for takeoff.

Dec 3, 2007 | 12:54 AM

idaho211

Tuned

Joined: Nov 2003

Posts: 491

Likes: 6

From: Eastern Washington

Let us know how it works. I am in the same boat with the 4.56 gears on my 60 4x4.

Dec 8, 2007 | 01:35 AM

joditruck

New User

Joined: Aug 2007

Posts: 20

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If it is the stock divorced t-case, then it is a spicer 24, not an NP205. Like the NP205 it is gear driven. It would cost you some money, but they make divorced np205's that you might be able to swap in and then add a gear vendors unit to it. Another option would be install 4:10 gears so you motor is not screaming.

Dec 8, 2007 | 12:17 PM

F6Guy

Elder User

Joined: Feb 2006

Posts: 833

Likes: 0

why not install an NV4500? I am sure some one makes an adapter plus it has to be cheaper than a new t-case and a gear venders unit.

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Dec 8, 2007 | 01:20 PM

HT32BSX115

Logistics Pro

Joined: Feb 2005

Posts: 3,952

Likes: 117

From: Upper Left Coast

Yeah,

Tell me about low gears! Mine is a 6.80:1 rear.

The Gear vendors unit is a fortune.

My plan is to use an E4OD with a 5.83:1 2 speed axle.

You can get an adapter for just about any trans. I think the one sold by http://www.transmissionadapters.com/ford_y_block.htm might work with a ZF 5 speed.

Cheers,

Rick