LT77 to R380 Conversion - Defender Source
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  #1  
Old March 19th, 2014, 03:05 PM
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Chris Baldewin
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LT77 to R380 Conversion

Does the R380 tunnel cover sit on top of seat box flange or below it. I’m converting my Lt77 to an R380 and want to make the flange. The tunnel cover is about a ¼” thick and I will be using it for my template. Any help or thoughts would be great.
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  #2  
Old March 19th, 2014, 03:31 PM
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are you changing the position of the engine? Which LT77 to which R380??

Quote:
Originally Posted by Baldewin View Post
Does the R380 tunnel cover sit on top of seat box flange or below it. I’m converting my Lt77 to an R380 and want to make the flange. The tunnel cover is about a ¼” thick and I will be using it for my template. Any help or thoughts would be great.
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  #3  
Old March 19th, 2014, 03:58 PM
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4 cyl Lt77 to NAS/300tdi R380 set up, but it shouldn't matter as the seat box sits in the same position. The piece I'd like to fab would attach to the seat box and allow the tunnel to attach to it. A 90 degree angle that follows the shape of the tunnel.
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  #4  
Old March 19th, 2014, 04:11 PM
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Quote:
Originally Posted by Baldewin View Post
4 cyl Lt77 to NAS/300tdi R380 set up.
Chris:
The tunnel will not have to be changed if it is:
If it's a shot 4 cyl LT77 to a stumpy R380
If it's a long LT77 for 300TDI to a long R380 for 300TDI

If you're pulling a 4 cyl LT77 shortie and installing a NAS V8 R380 with an adapter to mate it to a 300TDI then I think the tunnel will have to be modified.
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  #5  
Old March 19th, 2014, 06:44 PM
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I thought all tunnel covers fit over the seat box flange
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  #6  
Old March 19th, 2014, 11:49 PM
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Ed, that's what I'm looking for. Conformation that the tunnel cover sits on top of the flange.

Thx,
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  #7  
Old March 20th, 2014, 07:11 AM
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I have just sourced a tunnel, front and rear flanges for a member who is doing a conversion to an r380. The rear flange has come with plastic push through screw blocks. So it would appear that the tunnel sits on top of the rear flange....
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  #8  
Old March 20th, 2014, 08:40 AM
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Michael Giddinge
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Quote:
Originally Posted by Baldewin View Post
4 cyl Lt77 to NAS/300tdi R380 set up, but it shouldn't matter as the seat box sits in the same position. The piece I'd like to fab would attach to the seat box and allow the tunnel to attach to it. A 90 degree angle that follows the shape of the tunnel.
The new R380 tunnel fits over/above the old seat box "flange" for the LT77, but not on it. The seat box needs to be modified because the new R380 set up will conflict with it. Notice how the R380 tunnel flares out on the right rear side where it hits the seat box. That part of the seat box will need to be cut out.

I've done this same conversion and consistent with what you have suggested, I traced the new shape on the seat box from the R380 tunnel, and then shaped an aluminum angle to the opening, riveted it in place, and attached the tunnel to it. A bit tedious, but worked well.

You're going to love this new setup.
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  #9  
Old March 20th, 2014, 09:05 AM
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I'm in the midst of modifying an old LT77 seat box to work with the R380. Its a PIA, but has to be right.
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  #10  
Old March 20th, 2014, 09:11 AM
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I just did this as well.
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  #11  
Old March 20th, 2014, 09:28 AM
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Hoxie,

Where did you get the new flange that bolts to the seatbox?
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  #12  
Old March 20th, 2014, 09:32 AM
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Did you make two by chance?

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Originally Posted by hoxie173 View Post
I just did this as well.
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  #13  
Old March 20th, 2014, 09:46 AM
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Jeff, I've seen something on this and I believe I've seen it on this forum but if I remember correctly they are NLA.
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Originally Posted by JSBriggs View Post
Makes me wonder what they did when they swapped them under warranty.

-Jeff
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  #14  
Old March 20th, 2014, 10:00 AM
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There used to be a kit with a LR part number, I searched high and low for one but I could not find one.

Someone should remake that part as I am sure many people want them.
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  #15  
Old March 20th, 2014, 10:05 AM
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Quote:
Originally Posted by JSBriggs View Post
Makes me wonder what they did when they swapped them under warranty. -Jeff
V8 NAS LT77s have the same tunnel cover as R380s.
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  #16  
Old March 20th, 2014, 10:37 AM
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I asked YRM and here was the response but maybe if enough people ask?

Hi Dave,

Thanks for the enquiry.
Unfortunately not, as this is a pressed part.
Your best option would be to get one off a scrap seat box and fit to yours.

Kind Regards


Ronnie Jnr

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Do you or could you offer the plate on the front of the seatbox that allows you to attach an R380 trans cover. Land rover used to offer a conversion kit to convert your seatbox from an LT77 to an R380 style but the part is no longer offered. I think this could be a popular item if you were to offer it.
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  #17  
Old March 20th, 2014, 11:23 AM
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Quote:
Originally Posted by JSBriggs View Post
Makes me wonder what they did when they swapped them under warranty.

-Jeff
It depends which version to which version...

A V8 LT77 to a V8 R380 is a lot different than a 2.5NA LT77 to a 300TDI R380.

If you uses a short bellhousing R380, it is simple.
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  #18  
Old March 20th, 2014, 11:50 AM
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Quote:
Originally Posted by hoxie173 View Post
I just did this as well.

I'm going to put the hand brake on the passenger side. Get it out of my way!
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  #19  
Old March 20th, 2014, 12:11 PM
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Quote:
Originally Posted by Rocky View Post
I'm going to put the hand brake on the passenger side. Get it out of my way!
When we did my LHD conversion, we left the handbrake on the passenger side just for that reason. Definitely out of the way.
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  #20  
Old March 20th, 2014, 12:44 PM
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Quote:
Originally Posted by Rocky View Post
I'm going to put the hand brake on the passenger side. Get it out of my way!
I should have left it on the passenger side or purchased a lefty. "Converting" it to LHD was a pita. I made the flange out of some 1/16" alum sheet, traced the tunnel contour and then welded some bent up 1/8"x 1" flat stock together.
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