TR-6060 transmission on a M1010? Anybody done it?

[ballencd]

Looking for a viable transmission for my M1010. Like the grunt of the 4.56 gears but need to do highway speeds also as I want to travel with Oliver. Has anyone put a TR-6060 in a CUCV yet? How does it do? Top speed? MPG?

 

[Jeepadict]

4L80E swap is good as it gets for fundamental simplicity and form & fitment. The civvy Squarebody guys have been swapping them in for decades, and in most cases it only takes a few hours.

Sent from my SM-G970U using Tapatalk

 

[ballencd]

That OD would give me a 54 mph speed at 1800 rpm which is too slow for the highway. That's why I'm asking about 6 speeds. What about the 6L80E transmission?

 

[chevymike]

I have been researching 6L80E swaps as well and I think the biggest problem I run into is, finding a transfer case that is a passenger side drop, that will mate up to the trans. Info has been hit and miss on that. Since GM came out with that trans model, all transfer cases were driver side drop, which won't work for our CUCV's.

 

[ballencd]

Maybe a divorced transfer case would work. The truck is long enough for that I think....?
The low first would make it easy to start out but I wonder if the power of the 6.2 would even push it on level road in 6th? I've only l run this engine with the TH-400 trans and it did fine in my M1009 but the M1010 is a beast comparatively.


6L80E

1800 RPM 2200 RPM

• First gear — 4.027 9.92 12.012
  
• Second gear — 2.364 16.9 20.65
  
• Third gear — 1.532 26.07 31.87
  
• Fourth gear — 1.152 34.67 42.38
  
• Fifth gear — 0.852 46.88 57.35
  
• Sixth gear — 0.0667 59.89 73.19
  
• Reverse — 3.064

 

[ballencd]

From what I have read on other sites the 6 bolt P side drop case will fit the 6L80 transmission. I think it said you need to be sure your case has a 32 spline input and may have to cut the shaft off some but was fairly easy to do. I'm still looking. The only other alternative I have found is the TR-6060 manual. 1st gear in it can be from 2.5 - 3.0 range and the 6th is between .5 - .68. It does have a 1:1 for 4th gear but I'm not sure if that make much difference. It will bolt to the 6 bolt round transfer case too. No electronics is what I like on that conversion. You have to install a clutch assembly and they can be pricey but not more then the added computer for the auto. Yes the 4L80 makes the most sense but I am planning on traveling with my M1010 and need to do highway speeds.

 

[chevymike]

I was just watching a video on a guy who did a 2WD 6L90E to NP208 transfer case. The output shaft on the 2WD 6L90E was larger in diameter and 36 spline, versus the CUCV NP208 32 spline. He had machine shop reduce the diameter and cut 32 splines. I am not sure if this is an issue with a 4WD 6Lx0E or not.

I have the original TH400 with a Gear Vendor OD and 33" tall tires on my M1010. I can cruise at 65mph and can reach 80 if I am push it hard. Another option, might be a 4L80E with a GV unit. That would give you double overdrive BUT also gear splitting. Not a cheap solution but another option.

 

[ballencd]

From what I have read, the 6L90E has a larger shaft then the 6L80E. The 6L80E has the 32 spline like the NP-208, NP-241 and NP-242 and I am sure you could convert the NP-205 to work also but a bit pricier. A newer, not sure of the years yet, with VSS output might be helpful for the electronic controller...??? Of course with a manual you could jump start the vehicle when the batter was dead and there is no slipping even thought the auto could lock the converter. It's looking close to the same money but I have not gone deep into the pricing yet. I did get a quote for a new TR-6060 and it seems it was in the $8-9K range....ouch. Not remembering if that is with the bell housing/clutch/etc....not the pedals I'm pretty sure.

 

[chevymike]

Yeah, I was doing some more research on the 6L80E and yeah, it seems like it's the same size/spline shaft. Seems no method is likely cheap.

 

[ballencd]

Seems nothing is going to be cheap on this build. But then price a Mercedes 4x4 diesel camper. Very not cheap.