The new F150s and Mustangs use what is called a "Super 8.8". It has a bigger ring and pinion as well as more axle splines and a different housing. I'm curious to see if this becomes a popular aftermarket axle
What is your goal performance envelope?
Have you broken anything yet? The stock 9 inch they run isn't a huge upgrade depending on if they got lucky with an N casting. Just saying that the 9 inch is a rabbit hole. You can get to 40 spline drilled shafts if you want (or think you need) them. On the other hand, if you think their setup is an upgrade there is no reason not to try. Assuming you can weld.No, I'm on 44s front and rear. What started me down this path is my buddies. I mainly wheel with a group of 1st Generation Broncos. They all run 9" rears and 44 fronts. This was stock of Fords for a while.
Edit: Forgot to mention they all run 37" tires, heavy wheels and V8s. I haven't seen any issues with them, other than broken front U joints.
Couldn’t you run a 9 in the rear and a tj 44 in the front with 5.38s?
A smart right foot makes things last. You can break any axle with enough skinny pedal in the wrong situation.My main goals are:
- Keep the weight down (This is a big one for me)
- Improve ground clearance
- Stand up to 37" to 38" (Absolute Maximum) tires
- Stand up to a Golen Stroker (Sitting in a crate in the garage)
- Provide reliability, without constant maintenance
I'm not a heavy foot type and am more of a slow calculated crawler. I push the Jeep, but realize it's not a buggy.
No, I'm on 44s front and rear. What started me down this path is my buddies. I mainly wheel with a group of 1st Generation Broncos. They all run 9" rears and 44 fronts. This was stock of Fords for a while.
Edit: Forgot to mention they all run 37" tires, heavy wheels and V8s. I haven't seen any issues with them, other than broken front U joints.
Have you broken anything yet? The stock 9 inch they run isn't a huge upgrade depending on if they got lucky with an N casting. Just saying that the 9 inch is a rabbit hole. You can get to 40 spline drilled shafts if you want (or think you need) them. On the other hand, if you think their setup is an upgrade there is no reason not to try. Assuming you can weld.
I do run 5.13 with 37s. It's actually slightly better than 35 with 5.13 only because I have a lot of local roads at 55 and now third gear lets me drive those at 3k rpm and OD only comes on on the interstate (65mph)This is part of my problem now. If I wanted to run 5.13 I could. However, 5.13 wouldn't work with 37s and a 42RLE. The next step up is either 5.29 or 5.43.
So your buddies are running the 5.13/5.14?
Or a hp 44. Although it doesn't really matter at this point. Cost will be about the same.I would do the opposite hah, run a F9 front and leave my jk44 rear (35 soline) alone. So your buddies are running the 5.13/5.14? Wonder if that is so close they are basically not scrubbing? I'm thinking for like driving 50mph on snow.
I do run 5.13 with 37s. It's actually slightly better than 35 with 5.13 only because I have a lot of local roads at 55 and now third gear lets me drive those at 3k rpm and OD only comes on on the interstate (65mph)
If you go true hi9 you add about $1500+. The guys at ruff stuff are solid as are their products. Just another option for 9 inch housings.Exactly!
Well, the cool thing about running a Tru Hi9 front with a HP 60 rear is being able to tell your buddies that every time you change the gear oil it takes a case or 12 quarts. That also means you will use more gear oil in the first 1000 miles, 24 quarts, than most Jeep owners use in the life of their rig.Yeah there used to be a local forum with some “Gleed Boyz”, Blane I think was his name and he had a flatty buggy he built (pretty nice) and had some problems with the true Hi9, I read some more into the issue since my brother wants some for his early bronco. Still don’t know but still like them
This is part of my problem now. If I wanted to run 5.13 I could. However, 5.13 wouldn't work with 37s and a 42RLE. The next step up is either 5.29 or 5.43.
Hold that thought. I'm trying to see how far I can pee. Seriously though, what do you consider an axle with a decent safety margin for taking, say my kids, in to the back country and not wanting to make on trail repairs regularly with a slightly hot 4.0? Against 35's and again against 37's. What's your real world experience?Well, the cool thing about running a Tru Hi9 front with a HP 60 rear is being able to tell your buddies that every time you change the gear oil it takes a case or 12 quarts. That also means you will use more gear oil in the first 1000 miles, 24 quarts, than most Jeep owners use in the life of their rig.
I'm not the one to ask since my view of 37's is far more realistic than most based on the experiences of running them, and building a few axles to run them. Give me a good reason to run 37's that isn't based on aesthetics and we'll talk.Hold that thought. I'm trying to see how far I can pee. Seriously though, what do you consider an axle with a decent safety margin for taking, say my kids, in to the back country and not wanting to make on trail repairs regularly with a slightly hot 4.0? Against 35's and again against 37's. What's your real world experience?
Some are 8.8, mainly Currie, IIRC, some are 9inch, and some are 10 inch. I am currently building a 10 inch high pinion 9 from GearWorks and Spidertrax. Waiting on Spidertrax housings to come off backorder status. https://bomberfab.com/collections/d...-drop-out-5-43-billet-35-spline-billet-lockerI may be completely wrong here and I hope somebody corrects me if I am but my understanding is that most if not all fabricated 9” high pinions use an 8.8 ring gear. And I have read about the true hi9 that uses an actual 9” ring has problems with the ring gear cracking.
I’m not trying to sway somebody away from running a 9, in fact I would love to run 9’s in my rig just wondering if anyone else has heard about these issues.
There are vast amounts of 5.13’s and 5.38’s these days for the Ford 9/Fab 9One down side is you have to run 9's front and rear I guess. They dont have standard Dana Gear ratios like 5.13 or 5.38