BIGHEAD

I have got to replace the gears in my Dana 70 rear. I currently have an 01.5 with disc brakes on it, that I put in my truck last year. My truck is a 99. The rear end is gone again. The pinion nut loosened & I didn't catch it fast enough.
Anyway, I am wanting to go to 4.10's since I am going to change my 305's for some 315's. Even if I don't, the 4.10's will help me pull my boat & gooseneck better. My question is, where is the best place to purchase OEM DANA/Spicer gear complete kits? I am going to change all 4 bearings & the gears. The carrier should be fine.

My next question is, what to do on the front. I know I need to change the gears to match the rear, but I was curious if the 01, or 02's had better front breaks & or larger rotors & better stopping calipers. I would like to just buy a whole front end & swap it out. I am not worried about the ABS. I have pulled the plungers out of the ABS valves to get equal pressure to all 4 wheels. Would a swap be the most practical thing to do, to come out with better brakes & change the gears too. My front end is fine, that i have, but just need to make equal changes to the rear end. Thanks for any advice.

pocketchange

NO...
3.52's will keep you a happy camper and save you not having to get the extra set.
It's BS running 4.10's, all it does is cost you in terms of fuel milage AND
slows you down.
Even in extream conditions I've never wanted or needed 4.10's.

BIGHEAD

Thanks PC, but pulling bulldozers & backhoes on my 2500 does pose an extra strain on the tranny. I think the 4.10's will help me here. I also think going to the 35 inch tires is going to eat up even more power. I don't mind changing the front, especially if I can get a better brake setup than what is on the 99's

The bigger tires will cost me fuel mileage , unless I lower the gears to compensate for them. I don't think this situatuation will slow me down either. If i were running stock tires, i would totally agree with you. Thanks.

pocketchange

If you have a automatic trans in a work truck... good luck!
I've never had to worry about that problem,
it was solved when the rig was purchased and
I get my jollies at the drag strip with my turbo toy Buick.

Sea Bass

I really don't know that there are any advantages of going to 01 front axle. Randy's Ring and Pinion is where I'd go to get the parts I need. Good luck on the swap. I've been contemplating doing the same thing but I really don't tow that much. I just compensated for the big tires by just adding more fuel

I do have a buddy in the same situation (tows heavy,3.54s,315,s) and he did the 4.10 swap. He said it was the best move he ever made. He temps are down and his tranny is much happier. I'd say go for it.

gunnie

seems like i read somewhere here that the front axle assembly was different for the '99 vs'01. maybe there were some mods to do to get everything to bolt up and work correctly. i like the idea of 4.10 if you're pulling extremely heavy loads what size dozer you pulling with a 2500?

BIGHEAD

I am pulling a Cat D 4 & D 3, & a john deere 410 4x4 Backhoe. I also pull a 11000 lb boat. I use a 30 ft gooseneck. I know that the 01's have a different brake system. I don't know if they are bigger or better or anything. Hopefully someone will pipe in that knows. I would go as far as putting the 02 in, just to have the latest one. I am going to 4.10's. When you change the tire size, you in effect raise the gear ratio. I know that going to 4.10' s will lower them back down where the truck will perform basically as it does now. Even with the 33's, I should be in better shape, power wise. I would think the fuel & speed loss should be minimal. It will already hit 128 mph, so I would think I am OK to lose a couple mph. I just need to know whether to buy me a newer front end or change my gears. I do have all new brakes & such on my front now, so I would wait awhile before changing the gears any way.

kaffine krazed

Do the front brakes on the 99 use outboard or inboard mounted discs? I know the newer ones have outboard mounted discs but I can't remeber when they switched.

torquefan

Yes, the front brakes were upgraded for the 2000 model year. They went to dual-piston calipers, slide-off rotors (larger diameter I think), and some changes to knuckles, ball joints etc. If you are planning to change housings, that's what I would go to. It seemed to make a big difference in stopping and brake longevity.

BIGHEAD

TorqueFan, I am planning on changing the whole front axle, in one unit. Is there anything about an 02 front Dana that would be better than a 2000, or 01? I want to get the best braking performance I can. Thanks.

Tate

In later 02, they got rid of the CAD, so you have a 1-piece axle shaft on the passenger side. I also heard they went to a different knuckle, which is similar (the same?) as the new AAM axles.

torquefan

I can't think of any difference between 00-02 except, as was mentioned, the removal of the vacuum disconnect in 02.

BIGHEAD

I knew there was something different about the vaccuum disconnect system on the later 02's. Does anyone know when the system was changed in 02? I would definetly need to keep the use of the system as it is now on my truck.

BIGHEAD

Anybody Know when the vaccuum systems were changed in 02? Thanks

CTD NUT

The 02.5 trucks didn't have a vacuum 4WD engagement system - the CAD was deleted altogether. It's not that the vacuum system is different - it is non-existent. 02 trucks had the CAD but the switch-up to the D60 with the deleted CAD didn't occur until the 02.5 model which didn't start production until after Jan 1st 02....trucks made prior to Jan 1st 02 should be 02 models that still have the CAD.