Anyone have a 96-99 truck with 3.42's?

[GMC/Cummins]

Just wondering what truck might have come with this ratio? Looking for a set for my GMC/Cummins. Thanks

 

[1997chevydriver]

Mine does. Just look in the glove box for the rpo code of GU6

 

[glfirefighter144]

Mine too, the 96 and 98 both have them, GU6 is what they say too

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[GMC/Cummins]

So both are 1500's? Anyone with a 8 lug 2500 or 3500? Thanks guys.

 

[glfirefighter144]

3.42s will be a rarity in a bigger truck since they were generally work horses, but they do exist

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[GMC/Cummins]

Yes I'm starting to find this out. Going to a salve yard tomorrow to look at a set of rears (front and rearends) that they say has the 3.42 ratio. The last time I drove 2 hours to a place near Boston because "we checked them" and it was a set of 4.10's.

 

[glfirefighter144]

Yeah, almost better off ordering a new set

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[glfirefighter144]

Re reading the title, you should be able to use rear ends from 88- 00 classic model trucks with the axle you need, 88 is same as 98 as far as rear ends go, so long as the lug pattern and axle size matches

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[FastOrange]

my 1994 C1500 RCSB, 1996 C1500 ECSB and my 1989 K1500 RCSS had 3.42's.

 

[GMC/Cummins]

Ok the trip was worth it this time. I found both the front and rear with 3.42's. Under $500 for both. One problem there out of a 1990 truck so I can't used the Vin# to reflash the computer so the speed o will be right. Anyone feel like letting me use there vin # to reflash my computer? I can wait to get them in the truck.