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Old 10-27-2022, 01:36 PM   #41
SlimTim
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Yes, it does feel good to take it out and drive it after all that work. I canít wait to go climb some hills and see what it does.

I think my transmission issue is a bad wire or wire crimp. Hopefully I have time to look at it this coming weekend.

To my knowledge the Wabco unit has never been replaced. I thought I had it fixed as it stopped throwing a code for a short time; I removed and cleaned all the + and - power connections as well as the power unit connectors. I also thought maybe it was a low voltage issue like you had so I charged everything up to max. But it apparently decided it was not done messing with me.

FYI - my transmission issue was a wire that was set in the wrong pin location. I just had to move the wire one position over and it fixed the problem.
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Old 10-27-2022, 04:42 PM   #42
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Awesome Tim!!!! Thats a huge win!

How does it run? I assume night and day difference?
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Old 10-27-2022, 07:58 PM   #43
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Awesome Tim!!!! Thats a huge win!

How does it run? I assume night and day difference?
I think it is going to be really good when I get everything dialed in. The shift points are a little messed up so I am trying to get that figured out. It will shift into 4th gear before I even get to 45mph. Gosh forbid if I come to a hill doing 45 and itís in 4th gear itís not to good. However when itís up to speed itís awesome.
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Old 10-28-2022, 10:50 AM   #44
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I think it is going to be really good when I get everything dialed in. The shift points are a little messed up so I am trying to get that figured out. It will shift into 4th gear before I even get to 45mph. Gosh forbid if I come to a hill doing 45 and itís in 4th gear itís not to good. However when itís up to speed itís awesome.
I bet it pulls like a freight train when its up to speed!

Did you end up going with the 4.30's in the rear?
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Old 01-23-2023, 05:18 PM   #45
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ST, I appreciated all of the information that you have provided with this thread. We picked up our 08 6400 in 2017 and have been debating a re-power since our first trip to Colorado that year. I have looked at the Hypermax but with the limited torque capability of the tranny I am a little leery.

Have you been able to get yours out on the road since the install and if so what kind of difference did it make; performance and fuel economy wise?

Have you done any other upgrades since you picked yours up. We are seriously thinking of installing a Kelderman rear air suspension to help with the ride.

We are still trying to figure out what works and doesn't so if anyone has any good tips it would be greatly appreciated.
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Old 01-24-2023, 12:01 AM   #46
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ST, I appreciated all of the information that you have provided with this thread. We picked up our 08 6400 in 2017 and have been debating a re-power since our first trip to Colorado that year. I have looked at the Hypermax but with the limited torque capability of the tranny I am a little leery.

Have you been able to get yours out on the road since the install and if so what kind of difference did it make; performance and fuel economy wise?

Have you done any other upgrades since you picked yours up. We are seriously thinking of installing a Kelderman rear air suspension to help with the ride.

We are still trying to figure out what works and doesn't so if anyone has any good tips it would be greatly appreciated.
Wvlwolf - unfortunately I have not had an opportunity to take the 6400 on a long trip since doing the Repower. I am hoping to take it out this spring and summer.

My 6400 has the rear air ride installed on it and I canít say enough good things about it. I have driven mine with the air bags deflated and the air suspension makes a night and day difference.

In regards to the Repower the longest trip I have done with the new engine and transmission has been 30 miles. The new engine makes it way nicer to drive, but itís still not a performance machine. I need to buy a new TCM before I take it out again.

If you like your 08 and you donít have the desire to upgrade to a Renagrade or some other RV with the bigger engine and air ride I would do the Air Ride first and then look at the repower.
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Old 01-25-2023, 02:50 PM   #47
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ST, Thanks for the update and the insight. We are currently on the fence as to simply update this rig or go for a newer one. I really don't want to get into a regen rig and this 365 was pre-egr so it is a great engine just needs more umph. Our other issue with upgrading is that you cannot find a rig with the water, fuel, grey, and black storage that these have. Much less the sleeping capacity.

I have had to do some minor mods to ours so far in that I had to put supports under the water tank compartment because the weight of the tank was pushing the bottom out. I also just installed new tail light receptacles because the plastic clips that held the bulbs in were brittle and breaking.

I noticed in the thread that you said you had an ACE air ride system. I have not seen that one could you send me the link for their sight? I also noticed that you have aluminum wheels did you go 4 or 6 and did you have to put bigger studs all the way around for the wheels?

Sorry for all of the questions it is just nice to find people that have these rigs and may have already experienced some of the issues and have tips and tricks to move the process along.
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Old 01-25-2023, 10:50 PM   #48
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Link to the air suspension below:

https://www.superide1.com/index.html
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Old Yesterday, 11:31 AM   #49
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Darbgnik - Thanks for the link I appreciate it. It doesn't look much different than the Kelderman suspension. I will have to call and get pricing to compare.
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Old Yesterday, 07:23 PM   #50
SlimTim
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ST, Thanks for the update and the insight. We are currently on the fence as to simply update this rig or go for a newer one. I really don't want to get into a regen rig and this 365 was pre-egr so it is a great engine just needs more umph. Our other issue with upgrading is that you cannot find a rig with the water, fuel, grey, and black storage that these have. Much less the sleeping capacity.

I have had to do some minor mods to ours so far in that I had to put supports under the water tank compartment because the weight of the tank was pushing the bottom out. I also just installed new tail light receptacles because the plastic clips that held the bulbs in were brittle and breaking.

I noticed in the thread that you said you had an ACE air ride system. I have not seen that one could you send me the link for their sight? I also noticed that you have aluminum wheels did you go 4 or 6 and did you have to put bigger studs all the way around for the wheels?

Sorry for all of the questions it is just nice to find people that have these rigs and may have already experienced some of the issues and have tips and tricks to move the process along.
The fresh black and gray water storage is exactly why I purchased the GS6400 as well. We do mostly dry camping and when the wife can't take a shower before bead it's time to go home so lots of water capacity was a must. It is also one of the reasons I decided to do the repower instead of selling and trying to upgrade. Also, I did not really want to spend another $100k or more on top of what I would get for my motorhome to get into something with the ISL engine.

I replaced all 6 steel wheels with aluminum wheels. I think you can retain the inner steel and just do the four outer wheels if you want. But I got the wheels from a truck wrecking yard, and I think they only cost around $100 each. I took the four outer wheels to a polishing shop and had a mirror polish put on them. I tried to polish them myself but let's just say it did not work out. In regard to the wheel studs the fronts are long enough but the rear studs had to be replaced with longer ones. There is a thread on this forum I did about installing the aluminum wheels. I think you can search for all threads that I have done, and it should come up.

It looks like some other members have already posted a link to American Carrier System's suspension. The only issue I have with the ACS system is that they only installed a single leveling valve on my MH when they installed the suspension. This can cause the MH to lean to one side or the other if it's not loaded evenly from left to right. I am working on relocating the leveling valve and installing a second valve so the MH always stays level regardless of how it is loaded. So whatever system you go with make sure it has two leveling valves (one on each side). It's not going to happen this year but I have been working out how I can put air ride on the front as well.
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