driveshaft length

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Feb 27, 2008 | 07:11 PM

78fordman

Thread Starter

Cargo Master

Joined: Oct 2003

Posts: 2,833

Likes: 4

From: Jefferson, Iowa

driveshaft length

I have a 1970 f100 2wd long box and i am doing a tranny swap from the 4 speed manual to a c-6. right now it has a 2- peice drive shaft and i would like to switch to a 1 peice. what other driveshafts will work in my pickup? i don't have the tranny in yet, i want to get everything lined up before ripping into it.

Feb 27, 2008 | 08:06 PM

wizzard351

Postmaster

Joined: Sep 2004

Posts: 3,166

Likes: 2

From: wi

i got a 1 peice out of the junk yard 4 mine i think it come outa a 80 or 81 with a c-6 pick the yolk off the rear end also that way you can keep the same u jiont. before ya go to the junk yard take a tape measure and measure your drive line from front u joint to rear u jiont and then find one realy close,or have one made

Feb 28, 2008 | 05:43 AM

jowilker

Fleet Owner

Joined: Jun 1999

Posts: 24,552

Likes: 74

From: Creedmoor, North Carolina

I don't remember where mine came from, but I run a single with no problems in my lwb 66. You will need to get everything set up and then measure and have one cut to fit.

I think most find having one cut is more cost effective than all of the searching for correct length and ends.

John

Feb 28, 2008 | 07:43 PM

Danger_Dave

Fleet Mechanic

Joined: Dec 2006

Posts: 1,338

Likes: 6

From: UPSTATE NY

damn i wish we lived closer together, i would do a direct swap with you. tranny and driveshafts and all! i've heard those have a rediculously low first gear, nickname granny gear, but how do they handle on the highway vs a 3 speed auto? i have 3.25 gears and get 2800 rpm at 70mph

Mar 2, 2008 | 08:33 PM

78fordman

Thread Starter

Cargo Master

Joined: Oct 2003

Posts: 2,833

Likes: 4

From: Jefferson, Iowa

well i have 2.75 rear gears 26 inch od tires and get about 2100 rpm at 60. You can not shift them very fast, thats why i'm going to an automatic and my dad had a rebuild c-6 ready to go for the right price. thanx for all the answers.

Mar 3, 2008 | 12:46 AM

BobbyJ

Freshman User

Joined: Nov 2007

Posts: 34

Likes: 0

my 2 piece works great

finding the right u joints was a real pain

takin these old trucks apart then trying to put em back together aint not joke. be ready for a pain in the ***.

Mar 3, 2008 | 01:29 AM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 787

From: Simi Valley, CA

Most 1965/79 F100/150's use 1310 size Spicer Type U-joints: Front/Rear and Center (if applicable).

On some, the front and rear are the same...on others, the front is different from the rear and center.

1310: C3AZ-4635-E / C3AZ-4635-F / C3AZ-E is smaller in diameter.
-----------------------------------------------------------------------------------
There's another U-joint that was also used.

This is the combo 1310/1330 U-joint.

2 cups are 1310, 2 are 1330.

Ford part # C5TZ-4635-F / Spicer part # 210392-X