R380 v. LT177? - Defender Source
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  #1  
Old October 21st, 2008, 09:36 AM
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Fred
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R380 v. LT177?

I drove a 3.9 NAS 110 yesterday and it accellerated quicker and shifted smoother than my NAS 110. Throws were also a little closer together. The difference felt HUGE in the two transmissions. Anyone else notice the difference? The owner did not know if he had the R380 or the LT177. I think I want to switch to the R380 gearbox. What are the other ancillaries do I need? I have a totally stock NAS 110 drivetrain in mine. I imagine the 4.6 plus the R380 makes the 110 a hotrod!

Follow-up Post:

I mean LT77, LT177 is my tractor!

Follow-up Post:

Strange thing. The shift pattern was the same on the 110 I drove yesterday (reverse left and up). I've been reading that the R380 has a different shift pattern than my LT77. Why the heck was that thing so much tighter shifting and faster accellerating? It had the stock 3.9, no special mods, totally stock.


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Originally Posted by ORover
I drove a 3.9 NAS 110 yesterday and it accellerated quicker and shifted smoother than my NAS 110. Throws were also a little closer together. The difference felt HUGE in the two transmissions. Anyone else notice the difference? The owner did not know if he had the R380 or the LT177. I think I want to switch to the R380 gearbox. What are the other ancillaries do I need? I have a totally stock NAS 110 drivetrain in mine. I imagine the 4.6 plus the R380 makes the 110 a hotrod!

Follow-up Post:

I mean LT77, LT177 is my tractor!
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  #2  
Old October 21st, 2008, 08:42 PM
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Doug Crowther
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R380 has the reverse down and to the far right. I have had both- my r380 was in an NAS 90 with only 38k. My 110 has the lt77s with over 100k. Really didn't notice much difference other than the reverse/first being side by side in the lt77 can get a little dicey when you have to alternate between the two quickly off road.
Might be worthwhile to pull up the rebuild manual on the net for that tranny and see if the shifter mechanism itself can be adjusted to take up wear.
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  #3  
Old October 22nd, 2008, 09:32 AM
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4.11 vs 3.54 ?????
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  #4  
Old October 22nd, 2008, 09:55 AM
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The 110 has a 1.4 transfer case and the 90 has a 1.2
There is a weight difference, but the 110s always feel better to me because of the 1.4 transfer case. Might have been what you felt.
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  #5  
Old October 24th, 2008, 05:58 PM
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That could be it. I didn't know different gear ratios were even available. Maybe my timing is off a bit? That would do it too, right?

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4.11 vs 3.54 ?????
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  #6  
Old October 24th, 2008, 06:07 PM
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Tire size?
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  #7  
Old October 24th, 2008, 06:11 PM
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Fred
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Hi Mike!

Yep, smaller tires on the quicker feeling 110. The thing really moved out! The owner had no idea and said it was all stock he thought. Maybe my timing is off?

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Tire size?
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