4 speed for a C6

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Sep 27, 2001 | 06:34 PM

fossil

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4 speed for a C6

I'm getting a C6 plus transfer case for my 86 F-150 4x4. I have a 4 speed now. What kind of swap problems will I encounter.

Thanks for your input,

Harley

Sep 27, 2001 | 09:40 PM

Fordtruxrok

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4 speed for a C6

you'll hazve to: lose the clutch for a flexplate & torque converter, get an auto shifter, get an auto linkage, maybe change crossmember, different driveshaft, might have to change your throttle linkage for a tv cable connection, install a trans cooler, install lines for trans cooler, buy 13 qts of trans fluid, run a vacuum line for modulator valve, change front driveshaft, and possibly have to change the 4wd shift linkage.

Did I miss anything??

John

Sep 27, 2001 | 11:08 PM

restorit

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From: Bismarck, ND

4 speed for a C6

Maybe one detail. Unsure of your engine, but if it's EFI (i.e. the 302) you may need a new computer (?) Didn't these make a distinction between a standard trans and an automatic? Also, you'll need to figure out something new to do with your left foot and your right hand

! Just kidding, though getting into the same body-styled auto after driving my stick drives me nuts for the first several hundred miles, especially when I stomp the floor pan looking for the clutch when I come to a stop! Good luck!

Sep 27, 2001 | 11:46 PM

slimersoup

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4 speed for a C6

What's the difference in front driveshafts between sticks and auto's? A Bronc with a C6/NP208 uses the same one as a T-18/BW1356. I assumed it would be the same for all 1980-1996 fullsize trucks and Bronc's with a given front axle.

Sep 28, 2001 | 07:13 AM

fossil

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4 speed for a C6

Just to up date my origanal posting,

I have a 1986 F-150 4x4

Built 300 HP 300 i6

My transfer case broke in half so I need to replace it. I wanted to build a c6 up and install it anyway. So now that the case is toast I might as well change everything.

Thanks for all your help guys,

Harley

Sep 28, 2001 | 07:56 AM

lanero

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From: South Sioux City, NE USA

4 speed for a C6

[font size="1" color="#FF0000"]LAST EDITED ON 28-Sep-01 AT 08:57 AM (EST)[/font][p]

Quote:

The difference would be the length of the shaft. I went from a M5OD 5-speed to a NP435 and there was a 3 inch difference in length. Needless to say, the rear shaft had to be re-tubed 3 inches longer and the front needs to be cut 3 inches.
I hope this answers your question. ;-)

Roger Lane
Test Analyst
Sr. Automated Test Engineer
IBP, Inc.