Super 35 kit if only mall crawling?

[TanDeano]

Looking at Grimmjeeper.com, you would only be doing about 2000 RPM in 4th gear at 60. If you're holding the pedal to the floor for a significant amount of time, you're lugging the engine and need to downshift to 3rd.

With your current gears and tires, I would use 3rd to accelerate to whatever highway speed you need and then use 4th to hold that speed. You would still need to downshift to 3rd for any inclines or to accelerate. Any hilly sections, or sections with a lot of traffic I might just leave it in 3rd. With your current gears, I would almost never touch 5th.

But ultimately, you desperately need a regear.

I can regear the rear and hold off on the front for costs sake as long as I don’t engage 4wd right? I have a friends dad who’s been a mechanic for 35 years who said he could do the job, do I only need to buy the ring and pinion gear or is there other things you need when regearing?

 

[Westtown Willy]

I can regear the rear and hold off on the front for costs sake as long as I don’t engage 4wd right? I have a friends dad who’s been a mechanic for 35 years who said he could do the job, do I only need to buy the ring and pinion gear or is there other things you need when regearing?

I would buy the whole kit so the entire assembly can be rebuilt, something like this:

https://www.revolutiongear.com/prod..._dana_35dana_30_373_513_ratio_frontrear_wkoyo

 

[Steel City 06]

Definitely do a rebuild kit like that or at least a master install kit. You’ll probably need different shims, and it’s a good idea to replace bearings.

I highly recommend going 4.88 over 4.56. You could even go 5.13, though you would get a bit more noise and a slight loss of fuel economy going from 4.88 to 5.13.

If you think you’ll probably go to 35s at some point, then 5.13 would be more appropriate. Otherwise 4.88 is fine.

 

[DustinfromOhio]

What are your freeway speed limits there and how often are you on them? For example, Ohio’s are mostly 70 now and everyone runs 75, with 5.13s and 33s that puts you around 3056 rpm, even higher if your tires run a little small. 4.88s would be around 2907 rpm. I agree with above statements, even though 4.56s are generally the recommended gearing for 33s, the 35 bug always seems to follow...

 

[taylormade73]

For peace of mind, it might be handy to have spare shafts just in case. I think that it's pretty rare, but I have read stories on here from folks that broke dana 35 axles on the street with larger tires. Once this happens, there is nothing to hold it in and it will walk out on you like the picture below.

View attachment 190593

Had that happen to me on a 72 Lemans when I was 17. Axle came out and passed me up on the road while I slid over to rhe side of the road.

 

[TanDeano]

What are your freeway speed limits there and how often are you on them? For example, Ohio’s are mostly 70 now and everyone runs 75, with 5.13s and 33s that puts you around 3056 rpm, even higher if your tires run a little small. 4.88s would be around 2907 rpm. I agree with above statements, even though 4.56s are generally the recommended gearing for 33s, the 35 bug always seems to follow...

Interstate and highway speeds are usually 75mph but being Texas everyone does 85. Driving to work is highway driving and getting my doors blown off by a dually and having to move over for people is getting old. Im not opposed to 35's, just wondering if id need more lift to fit them?

 

[DustinfromOhio]

Interstate and highway speeds are usually 75mph but being Texas everyone does 85. Driving to work is highway driving and getting my doors blown off by a dually and having to move over for people is getting old. Im not opposed to 35's, just wondering if id need more lift to fit them?

If you intend to run 85 mph fairly frequently and the terrain is flat I would probably be more conservative with gearing. 35s are a whole different can of worms that you might want to avoid for the time being (steering/brakes/axle shafts/carrier/bigger lift/etc)

 

[TanDeano]

If you intend to run 85 mph fairly frequently and the terrain is flat I would probably be more conservative with gearing. 35s are a whole different can of worms that you might want to avoid for the time being (steering/brakes/axle shafts/carrier/bigger lift/etc)

so maybe do stick with 4.56 or would you still recommend 4.88?

 

[Ephry73]

I would definitely stick with 33s if you're going to do a lot of highway driving. My TJ has 33"(more like 32) and I have the AX15 5 speed and geared to 4.10. May not be a grunt beast for crawling, but I can do 65-75MPH all day without issue. 3.07 is just not right. If you are going to re-gear maybe 4.56 would be a good compromise.