The hood tag lists my factory installed transmission as a "DGA." I will have to research further but was under the impression this was a 36RH.

 

This is good thinking. Even when towing light loads the 8.25" rears only go about 100K before the bearings begin to howl which makes highway cruising between 50MPH and 70MPH a real annoyance.

 

Good to know. My 2000 manual shows only the following automatic transmissions for this year:

DGG - 32RH
DGT - 46RE

It looks like DGA is a general code for automatic transmissons. There are two locations to find the vehicle specs. One is the sticker under the hood, the other is the metal body tag riveted to the inside fender beside the battery. My sticker lists DGT and DGB. My body tag just says DGT.

 

Seems I missed this post. Thank you! I will add this information to my Dodge van notes.

 

You can buy ring and pinion sets online for $250 - $500 depending on quality and popularity. 4.11 gears are usually cheapest because they sell more of them. I was able to find 3.21 gears at two websites for around $250 this afternoon.

You can't just bolt these in, the backlash and preload has to be set and its a precision measurement. I had a source for a ring and pinion install kit that includes the dial indicator and everything you need for $200. For some reason I can't seem to locate that right now but will keep looking.

 

i will be doing the same with my 1999 ram v6 >>>>>> 46re behind 3.9 v6 ..... will i still keep the powe up ........ No havey load .....passenger van >>>>most of the time only me and my wife....... 90% of the driving time is on the free way >>>>the 46re which i am willing to use is in a very good condition>>>>> is it going to be too strong for 3.9 engine?

 

So I know this is an older post but has anyone that was thinking about swapping rear ends or transmissions do the swap yet? I have a 1999 3.9 with 3 speed and want more gears or higher gear. Should I just get bigger tires? I'm replacing or rebuilding tranny so though good time to do it.

 

This has been discussed in multiple threads and the consensus is that the 3.9L just doesn't make enough torque to make good use of OD. You can either change the rear gear ratio or switch to taller, harder tires. I think that Stev's gas milage thread will be the most help.

https://dodgeforum.com/forum/dodge-r...rovements.html

 

Jeep put 4 speeds (42re) behind six cylinders for years. Many of these run way taller tires too. The overdrive units interchange 46rh, 46re, 42re, among others. Some of the Jeep guys even put 46re guts in a 42re case for a stronger unit. I think the six can pull it with a light load, and favorable winds. But like was said above you will need a rh suffix trans to avoid a shift computer.

 

Sure, because a Jeep weighs around 3,000 lbs, stock engine is 105 hp, 150torque and has a GWVR of 4500 and isn't expected to carry a 1000lb payload daily.

This Dodge van is a half ton truck that weights over 5000 lbs and a GWVR of 6600 minimum. The 3.9L Magnum does maybe 170 hp and 230 torque and that assumes everything is working perfectly. OD is just not happening. The truth is they had to lower the first gear ratio on *all* 3.9L Dodge Magnum vans due to lack of torque. You could switch to taller tires and give up even more torque, but I doubt the gas milage will change.