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Old 04-16-2018, 09:58 AM   #421
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I have heard rumors of people considering the Jeep AX15 manual transmission too. Supposedly it is a little stronger than the R380 and widely available/affordable.
The NV3550 is supposed to be a little stronger and was the replacement for the AX15. From the info I've read the NV3550 is rated conservatively for 300lb/ft so it should be fine with the R2.8 in stock tune.

The Axis adapter kit for the AX15/NV3550 is just over $1,500.
AX15/NV3550 seem like you can get from $500 on CL to $1,500 for a reman'd version
But mating an AX15/NV3550 to an LT230 is the part I'm not sure about.
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Old 04-16-2018, 10:09 AM   #422
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But mating an AX15/NV3550 to an LT230 is the part I'm not sure about.
Last time I talked to Nick (LS Nick) he said he believes his LT230 adapter will work the AX15
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Old 04-16-2018, 10:23 AM   #423
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Early on when trying to decide which way to go we considered the Aisin. After playing with the gear ratio calculator on the Cummins repower site the decision was made to go with the 6l80e for the 6 gear options and 4.10 diffs with a 1.2 tcase. The industry seems to be moving to more gears so that you can always find the sweet spot as opposed to being caught in between two gears and needing a split. Chris and Kevin @ Axis are working on making an 8 spd work.

This weekend we talked a lot about having stronger mainshafts made for r380's. Going to see if its possible to make an r380 stumpy trans that will hold up.

That would enable defender owners to not need to change seatbox, tunnel, floors etc and placing the engine further back eliminates the need to change the factory chassis mounts. Ie make this a bolt in. We preceive the primary market/application for these engines to be trucks that were rover 4 cyls that need either complete rebuilds or repower.
First off congrats on finishing the R2.8 conversion - I'm really hoping I cross paths with the owner and his 90 this summer/fall and get to see it in person!

I was going to ask you what axle gearing you used. I know with the 3.9 V8 I had in my NAS 90 the 4.1 gearing was fine with 35's. It's good to know the R2.8 can turn 35" tires. The UA CJ6 is on 38"s but I'm sure that rig is lighter and has lower tranny and Tcase gears: https://cumminsengines.com/uploads/d...eep-UACJ6D.pdf

I've been researching it a lot trying to associate prices with the different tranny options. The simpler and maybe cheapest route (depending on how much a beefier R380 would cost to build) would be the a stumpy R380. Like you said essentially bolt in Axis has their adapter at $2,200 (which could be the price of the NV3500 adapter and a good used NV3550).

Do you think a stock 200tdi Radiator and IC have the cooling capacity for the R2.8? Like you said if this could be a bolt-in for a 4 cylinder LR's and work with a majority of the existing items it would be a strong option even when adding the cost for adapters and engine mounts.
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Old 04-16-2018, 10:38 AM   #424
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Last time I talked to Nick (LS Nick) he said he believes his LT230 adapter will work the AX15
I'm guessing the NV3550 as well?

How thick is the Tranny to LT230 adapter?
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Old 04-16-2018, 11:22 AM   #425
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I'm guessing the NV3550 as well?

How thick is the Tranny to LT230 adapter?
That would be a question for Nick
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Old 04-17-2018, 08:50 AM   #426
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So how was the drive/power of the r2.8? What would you say it is comparable too?id love to test drive one someday!
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Old 04-17-2018, 09:41 AM   #427
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I'd love to see the interior of the truck, how the tunnel and shifters look/located.
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Old Yesterday, 11:02 PM   #428
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I really would love to hear how an engine like this is in a 110. Thinking of making that combo. Would be a legal one.. the 6BT would get flagged where I am at unless you skirted stuff which could have bad results...
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