How Tough?
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Freshman User
Joined: Jun 2004
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How Tough?
I have a 1970 F-250 Ranger XLT Camper Special with a 390, a New Process 435 4-speed, and a Dana 60 with 3.54 gears. I was just wondering if anyone knows how tough that driveline is. I believe the clutch is the original one that came with the truck so I figure that might be a bit weak. Thanks in advance!
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
That's all bullit-proof hardware. I suspect some Dana 60s came with limited slip and some did not. You might be able to tell by looking at the tag on the DIff, if it is still there.
It may also be in the trucks VIN!
It may also be in the trucks VIN!
Post Fiend
Joined: Sep 2004
Posts: 5,231
Likes: 1
From: Near Fresno, California
If the original was limited slip there will be a warning sticker somewhere - warning you not to operate the truck with only one rear wheel on a jack. Sticker might be in the glove box, but on the larger trucks it was on the floor pan between the seat and the driver's door.
Senior User
Joined: Jun 2003
Posts: 123
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From: WI
Hmmm... A 390 with a 4-speed. Here's a 5 step process to determine if you have a posi or not:
1) Quit looking for tags and stickers. Who knows what the previous owner swapped in or out.
2) While the truck is running and clutch depressed, point the shifter to the little "2" on the handle diagram.
3) Rev engine to 3000 rpm.
4) Dump clutch while mashing gas.
5) Return to observe your damage. If there are two black streaks on the pavement, 2 ruts in the gravel, or 2 mud streaks in your boss's lawn, it's a posi. If there's only one, it's open.
1) Quit looking for tags and stickers. Who knows what the previous owner swapped in or out.
2) While the truck is running and clutch depressed, point the shifter to the little "2" on the handle diagram.
3) Rev engine to 3000 rpm.
4) Dump clutch while mashing gas.
5) Return to observe your damage. If there are two black streaks on the pavement, 2 ruts in the gravel, or 2 mud streaks in your boss's lawn, it's a posi. If there's only one, it's open.
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Freshman User
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Thanks everyone!! Thats just what i had in mind 69SWB3004X4, but i wanted to make sure i wouldnt break anythind before i do!! Thanks again
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