Clutch plate or kit LT95 w/a 3.5L to a 4.2L - Defender Source
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  #1  
Old December 30th, 2014, 08:05 PM
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Andy
1986 D110
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Clutch plate or kit LT95 w/a 3.5L to a 4.2L

OK, I am installing a 4.2L RRC engine to a LT95 in my '86 110. I might need a clutch plate or even a clutch kit. So, starting the search. I'm not even positive yet that the original 3.5L flywheel and clutch will work on the 4.2L. Any ideas? and/or parts available? Any good inexpensive sources even? I'm not looking for premium quality but rather something in the middle.

Thanks,

Andy
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  #2  
Old December 30th, 2014, 09:16 PM
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Bill Ski
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I went with a 3.9 in front of my LT95 no issues with using the flywheel. Make sure to order the pilot bearing though I forgot.

Picked up the clutch kit from Justin at Lucky8 (716) 898-8153 really reasonably priced and shipped really quick. It's been working great for 10k miles.
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Old December 30th, 2014, 09:46 PM
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Andy
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Thanks Bill! That helps me a ton! Hope you had a nice Christmas. Happy New Year!

Quote:
Originally Posted by ArmyRover View Post
I went with a 3.9 in front of my LT95 no issues with using the flywheel. Make sure to order the pilot bearing though I forgot.

Picked up the clutch kit from Justin at Lucky8 (716) 898-8153 really reasonably priced and shipped really quick. It's been working great for 10k miles.
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Old December 30th, 2014, 09:51 PM
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Bill Ski
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No worries, the three of us using a LT95 need to stick together. Happy New Year!
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Old December 30th, 2014, 11:05 PM
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David Short
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There are more than 3 folks with an LT95.

thread hijack - question back to the fellow with the 3.9 in front of the LT95 ... Do you know what xfer gear ratio you have? There are 4 or 5 different ratios that can be found in the various flavors of the LT95.

I swapped from the 1.4:1 all the way up to the .9:1 but I kept the 3.5L. I think I should have gone to a 1.1:1 instead - but I wonder what performance you experience with the slightly larger 3.9L.
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Old December 31st, 2014, 12:33 AM
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Quote:
Originally Posted by Firemanshort View Post
There are more than 3 folks with an LT95.

thread hijack - question back to the fellow with the 3.9 in front of the LT95 ... Do you know what xfer gear ratio you have? There are 4 or 5 different ratios that can be found in the various flavors of the LT95.

I swapped from the 1.4:1 all the way up to the .9:1 but I kept the 3.5L. I think I should have gone to a 1.1:1 instead - but I wonder what performance you experience with the slightly larger 3.9L.
ok 4?


I believe based on rpm I unfortunately have the 1.4.

My 3.9 has a 50229 cam, Edelbrock performer intake, Holley 390 four barrel and long tube headers. If the first 2 gears weren't so damn short it would be downright quick. Compared to the 3.5 it's a Ferrari and makes a V8 sound that makes you want to run it to 5500 rpm before shifting.

I'd really like to find a good 5spd, or just wimp out and put a zf behind it. So I wouldn't be screaming that 3.9 down the road at 3k plus rpm on the highway.
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Old December 31st, 2014, 11:03 AM
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David Short
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LT95 Gear Ratios

Work on your Dutch Language skills and load this web page.... http://www.vislandrovers.nl/extra/re...en/versnel.php

It shows all the variants of the LT95 gearbox and high range transfer case ratios.

I think the Stage One and most D110's came with the 1.336:1 (1.4:1) ratio box. The Range Rover and the 101FC had the other variants.

Your 3.9 modifications nearly match my 3.5 modifications. I found that the 1.4 ratio left my truck wound too tight at highway speeds just as your describe with yours. I had a spare box in the floor of my garage that just happened to have the 0.996:1 ratio gears in it - so I swapped them.

Unladened and on flat roads - the higher gears make the truck a whole lot more civilized to run down the highway (and I drive it once a year from VA to ME for the Winter Romp - 660 miles each way on interstate highways). Towing my camper trailer up hills... it struggles a wee bit. I think the gearing is just too tall (poor match of road speed / gear ratios / engine rpms / power and torque curves).

I bet the 3.9's little extra power might be better for that gear ratio.

In any event - troll the interweb for a parts LT95 and harvest the hi-range xfer gears out of it. Swap your gears out (simple process - see attached PDF) and you will be driving a "new truck" at a fraction of the cost and effort of fitting a 5 speed gear box. I would aim toward finding something around the 1.113:1 ratio gear set.
Attached Files
File Type: pdf Transfer Case Gear Swap.pdf (213.4 KB, 43 views)
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  #8  
Old December 31st, 2014, 11:13 AM
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Bill Ski
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Thanks for the pdf, that doesn't sound to horrible. Probably easier to do the swap than find the parts.
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