i am just curious i dont have the truck anymore and i swapped the motor into a chevy and i am trying to see what was in it comparatively. i believe my dually has 4.10s in at it has no top end so trying to figure out what i need to get

 

3:55 is the most common but some had 4:10

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my 91 has 3.55. 4.10 was a option

 

So were 3.07's.

 

89-91.5 Depends on trans...3 speed torqueflite got 3.07 overdrive got 3.55 4.10

 

auto were 3.07 3.55 and 5 speed were 3.55 and 4.10

 

5 speeds could be had with factory 3.07's. Overdrive auto's could have 4.10's, but not 3.07's.

 

Ok guys I've got another question. I found a rearend. Out of a Dodge dually with 3.55s but my question is was it a dana 70 or a60 that came in them. The guy doesn't know what it is and im trying to see what problems I will tun across because mine has a 70 in it. Problems like different yokes (I.e. driveline mods) track width perch width and e brakemaster hookup please help if anyone knows. I need my truck to finally be able to do freeway speeds!!!

 

No one knows?

 

Rear duallys were 70s. Fronts w/4x4 were 60s.

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