Engine/Transmission (1998.5 - 2002) 3500 to 2500 gear swap

[wrichards]

I have a 2002 dually and a 2001 2500 that has the 4. 10 rear. The gears in the 2002 are I think . 354 as I am turning about 2000 rpm at 65 MPH. Could I swap gears between these two trucks?

 

[BDaugherty]

If they have the same axle, yes. If the '01 is a HO 6spd truck with a 4. 10 dana 80 and the '02 dually also has the Dana 80 rear, then you can swap them for sure. You would have to set the gears back to the same pattern that they were running when installed in the other housing.



I'm not exactly sure, but if the spring perches are the same width between the 2500 and 3500, then I would just swap the entire axle housing and then swap the hubs. That way you don't have to mess with resetting any of the gears. You shouldn't even have to bleed the brakes again because all you have to do is wire the calipers up out of the way while you have the axle out and then bolt them back to the new axle.



If I'm really wrong on this, someone please correct me. I've never owned a 1 ton Dodge.

 

[wrichards]

Wow, that would be great. I have a call into a shop, how can I tell the rear ends - is it on the sticker?

 

[wrichards]

BTW the spring perches may be ok. It is a chassis cab which I believe had a sorther Axle than the dually pick ups.

 

[wrichards]

What about the front?

 

[SnoKing]

Sounds like the 2002 might be 4:10 also. 2K is around 63-65 with an auto and 410's. The auto has a stepper OD ratio, so it will turn a few less RPM's than the 6 speed manual. 3:56's should be turning less RPM than that at 65. Maybe 1800 RPM.



SNOKING

 

[MarkMiller]

2000 rpm in an auto truck would likely be the 4. 10 gearset. With a stick, more likely the 3. 54. The auto has a much deeper OD gear than the manual. . 60 vs. . 78.

The 2001 truck would also have drums in the rear and the 02 would/should be disks.

 

[SnoKing]

2000 rpm in an auto truck would likely be the 4. 10 gearset. With a stick, more likely the 3. 54. The auto has a much deeper OD gear than the manual. . 60 vs. . 78.



The 2001 truck would also have drums in the rear and the 02 would/should be disks.

2001. 5 got the disc brakes on the rear!



SNOKING