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F44 Question


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#1 callisto

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Posted 23 October 2011 - 12:47 AM

I just bought a 1990 K1500 single cab chevy with the 350. I wrote all the RPO codes down and went inside to look them all up. Turns out this thing's got the F44 option, along with several other heavy duty options. Heavy duty suspension, brakes, radiator, oil and trans cooler, the whole nine yards.

Thing is, I have been researching this F44 option, and most places say that with that code it should have the 14 bolt, six lug rear end. Mine doesn't. Its got a ten bolt, five lug, 3.73 rear end.

What gives? Did the original owner alter the option package or something?

#2 04Liftedredcrewcab

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Posted 23 October 2011 - 09:48 AM

someone took your 14bolt. So your truck is 4wd? If so, someone swapped out your axle for a 2wd axle.
 

 

 


#3 callisto

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Posted 23 October 2011 - 10:11 AM

Just checked again and it actually has six lugs. Can't count or something. But its a ten bolt, six lug.

And yeah, it should be 4x4. But I have not really had a chance to test it out.

Edited by callisto, 23 October 2011 - 10:19 AM.


#4 callisto

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Posted 20 March 2012 - 09:29 PM

I wanted to bring this back up, mostly because it is bugging the crap out of me.

If I have the F44 code, does that definitely mean it should have a 14-bolt rear diff?

Because I have a 10-bolt six lug rear diff.

I think there was a code for the ratio, is there a way to find out the ratio when physically looking at differential?

#5 Sierra89

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Posted 22 March 2012 - 11:51 AM

I have a 89 F44, I know they came with the 10 bolt rear end, 6 lug. Mine has it and I know thats how it came when it was new.
Maybe you could order it with the 14-bolt rear, that I don't know.
Cheers,
Matt
89 GMC Sierra SL 1500, 4X4, 5-speed, F44 "heavy duty"
94 GMC Sierra SLE
06 GMC Sierra SLE Z71




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