I originally had to swap these in a week cause was hauling stock trailers for a living,but 6 yrs ago I burned a hole in #6 cyl this time, I tried to do it right.  Fabricated trans mounts using exiting trans mount locations in frame

What’s the transmission out of?

Medium duty Freightliner, Volvo, Kenworth or Mack all used these, it uses a Volvo Master/Slave cyls

Nice, how many speeds is it.

 How did you put a hole and piston, got it too hot. How hot is hot and how long you held it there.

 

It's a 6 speed with ratio's close to the NV5600, but will handle 840 Lbs ft of torque, hence the 8406, fuller made other 6 speeds, 5406, 6406, I got a lot of my info from another guy I think is in N.M  but I think he had 6406, the clutch is only a single disc rated at 630 lbs ft. Went through 3 count 1,2,3 NV5600's before I did this.

Bad injector is best guess, sloppy maintenance on my part, drove to Des Moines thought it ran smoother than ever before, hooked a trailer and 30 miles later hell broke loose. 

 

If my nv5600 ever goes south I want to hook up a 6 or 8 speed such as this to my truck. 

@Blueox01  Are those mid duty transmissions synchronized or unsyncronized like the larger ones, Also did you have to do a body lift to fit in your truck or floorboard modifications  

4 hours ago, 01cummins4ever said:

@Blueox01  Are those mid duty transmissions synchronized or unsyncronized like the larger ones, Also did you have to do a body lift to fit in your truck or floorboard modifications  

This one is synchronized, had to make a doghouse for it to fit

If it can handle 840 ft/lb of torque then how much nv5600 can handle, I'm pretty sure I'm close to 1000 on my truck or so it feels that way

9 minutes ago, Dieselfuture said:

If it can handle 840 ft/lb of torque then how much nv5600 can handle, I'm pretty sure I'm close to 1000 on my truck or so it feels that way

Some say 550-600 lbs/ft   I know I snapped the mainshaft pulling a set of doubles against a headwind in Oklahoma  that was NV5600 #1, I shelled 2 more after that. You put this case next to a NV5600 the dodge 6spd looks like a baby.

Edited September 13, 20186 yr by Blueox01

You probably had the older version with smaller input shaft, 01 and newer I believe is 1 3/8 where before they were 1 1/14 

550 ft-lbs is the rated continuous input torque. I’m not sure what the maximum momentary input torque is, but you’re not gonna be using all 1000 ft-lbs all the time, so you’ll probably be below or just at the 550 ft-lb limit. Plus, there’s a factor of safety and an expected life factored into that 550 number, so it’s conservative anyways. 

12 minutes ago, Dieselfuture said:

You probably had the older version with smaller input shaft, 01 and newer I believe is 1 3/8 where before they were 1 1/14 

He has an 01. First year of the 1-3/8” shaft 

Edited September 13, 20186 yr by trreed

7 minutes ago, trreed said:

550 ft-lbs is the rated continuous input torque

What about g56, just looking for options for future lol

Around 675 I think? The 4th gens have 660 ft-lbs stock so it’s gotta be around the 675-700 number. G56 has an aluminum case though and can crack under high power. @TFaoro‘s was behind a 900 hp truck and is fine so it’s all about driving smart. 

Edited September 13, 20186 yr by trreed

No clue, This 8406 has a 1 3/4 10 spline input shaft and pull type clutch

4 hours ago, Blueox01 said:

No clue, This 8406 has a 1 3/4 10 spline input shaft and pull type clutch

Nice pic! I’m digging your build! 

Nice build.

Question: is that Mitsubishi Starion or Dodge Conquest in the back on this picture?

87 Starion ESI-R , Sharp eye!

Edited September 14, 20186 yr by Blueox01

  Me too I also have Mitsubishi Starion 87

Cool

You on Starquest Forum?