• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Adventure Vehicles NW vs Autoworld Motor Mounts

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
All things considered that is a good job on the exhaust however; there is a custom exhaust company out there in Cali called spintec look at their transission tubing and elbows for future projects.

Have a correction too the motor is canted to the drivers side and 300 mm off center to the passenger side as viewed fro the front and 5 to 5.5 degrees cant down at rear.
 
Last edited:

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
All things considered that is a good job on the exhaust however; there is a custom exhaust company out there in Cali called spintec look at their transission round to oval tubing tubing and elbows for future projects.

Have a correction too the motor is canted to the drivers side and 30 mm off center line to the passenger side as viewed from the front and 5 to 5.5 degrees cant down at rear.
 

Scholioso

Active Member
Messages
116
Reaction score
83
Location
Ca
Fellow Traveler, you're saying the cummins needs to have those dimensions? Or those are the factory dimensions of a gmt400?
 

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
Its for all GM motors in the GMT400 as stated in the GM upfitter manual and the newer series would be about the same because of IFS differential placement and maybe true for 2wd too. That's how I placed my Cummins in my GMT425 Suburban. Keep I mind you can drop the differential 2" for better clearance and move the diesel aroud to fit your custom application but I stayed with how the GM diesel was installed.
 

Scholioso

Active Member
Messages
116
Reaction score
83
Location
Ca
Alrighty guys. Background on my truck. I have a Superlift 6" lift kit on my truck. It relocates the diff down & has a crossmember bar that runs from one side to the other in place of the diff up top. Well, I've been running the AVNW mounts for a few months now & I haven't had much issue. However, as of lately, the oil pan was contacting that crossmember bar upon shut down & start up. I would adjust but the rubber 1st gen mounts would just flex back to where they wanted to be.

Due to this, I decided to purchase a set of mounts from Screemin Seeman offroad. Right off the bat, these mounts are much much beefier. They bolt to the engine in the same mounts as a 2nd gen, & then bolt to the Chevy gmt400 frame in the same holes as the stock Chevy clam mounts. However, as with most, the upper lip of the frame mounting perch has to be removed (which I had done already for the swap). The mounts bolted to the engine completely fine, however, bolting them to the frame was another story. Took a buddy & I about an hour to get them right (we think). I couldnt get the brackets that bolt to the frame to line up or sit flush. After loosening one side & then using all 4 bolts (per side) to pull the bracket down, they now sit flush. This was a challenge as we has to jump from side to side, front bolt to rear bolt, etc etc. Just to get the bracket to sit flush. Was a bit of a pain.

However, all that is worth it in the end. The Cummins doesn't move at all! No vibrations to the cab, no shaking, etc. Even blipping the throttle & trying to get the engine to shake, shes solid! (Shakes a little, but not nearly as bad as the 1st gen AVNW mounts)

Front to back: AVNW vs SSOR GMT400 Cummins motor mounts
 

Attachments

Scholioso

Active Member
Messages
116
Reaction score
83
Location
Ca
I'm not an engineer, so take what I say with a grain of salt. These mounts are essentially leaf spring bushings. I don't know about you guys, but the only time I've ever changed leaf spring bushings was when I did my lift kit since they weren't included.

The SSOR design mimics the 94 & up factory Dodge design. Which as everyone in the dodge world will tell you, is a much better design than the 1st gens.

I'm not trying to bash on the 1st gen mounts. Theres no denying that they work. However, theres a reason they were changed after only 4 or 5 years. The 94 & up design has evolved, but has retained the same bolt & insulator/leaf spring design since. In my experience, due to the studs in the mount itself being offset, the motor tended to wander. Regardless of how tight the mounts were. Also, the engine just looked like it was too heavy for them. They always looked like they were 3 seconds from getting torn apart.

Again, this is based off my own personal experience & preference. Just sharing my thoughts with ya'll.
 

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
I'm not bashing the SSOR and may very well get a set for my conversion but use poly instead of rubber.

Having owned a 2nd gen Ram Cummins 3500 I'm very familiar with the design which is not like a leaf spring bushing........it's isolater design revolves around a much different concept of torsional loading to counter the Cummins torque making for long lasting rubber inserts.

However; there is nothing wrong with 1st gen aftermarket poly mounts as they are a much better design that places the mount breakage retainer inside the poly which keeps things from dancing if the mount breaks while the factory 1st gen design allows the Cummins to dance more because its mount breakage retainers are on the outside of the mount thus allowing the diesel to dance even more when broken........
 

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
OK! I just got off the phone with Paul at SSOR and I'm buying their mounts "yes they are rubber" and the lower water outlet flange.

Paul was very helpful and explained that the compound of rubber used has held up well with GMT400/425 conversions even in a 1.2k HP conversion so that sold me. He pointed out that using poly in his design would be too harsh while he did admit the GMT400/425 OEM clam shell poly mounts work perfectly with the 6.5td or BBC its not what he designed his mount for.
 

Scholioso

Active Member
Messages
116
Reaction score
83
Location
Ca
Nice! Glad Paul was able to help you out! Paul has offered me advice throughout the years & been extremely helpful. Being that hes done a few of these, it makes sense. I would love to purchase his upper compressor mount as it utilizes medium duty alt & compressor. I'm all for overkill!
 

FellowTraveler

Well-Known Member
Messages
2,917
Reaction score
2,547
Location
Nature Coast
Nice! Glad Paul was able to help you out! Paul has offered me advice throughout the years & been extremely helpful. Being that hes done a few of these, it makes sense. I would love to purchase his upper compressor mount as it utilizes medium duty alt & compressor. I'm all for overkill!
Have you looked into the Fummins mid-mount its for medium duty too "all Cummins part numbers" and any alternator can be configured to fit on top.
 

usanumber1

New Member
Messages
4
Reaction score
4
Location
San Diego
Nice! Glad Paul was able to help you out! Paul has offered me advice throughout the years & been extremely helpful. Being that hes done a few of these, it makes sense. I would love to purchase his upper compressor mount as it utilizes medium duty alt & compressor. I'm all for overkill!
Carrick Customs, a Fummins specialist, is making me a upper driver side AC mount that runs off the same serpentine instead of a running a v belt. I sent him a compressor, and he’s modifying his Ford mount for the GM compressor. Went this route because i’ll be able to retain all of my GM a/c system; hoses, wires, plugs, etc
 
Top