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  #41  
Old July 6th, 2015, 02:52 PM
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Similarly to Napalm, I have an early Suffix D LT77 on my 200tdi running Honda MTF, mated to a 1.2 LT230.

Besides a problem with a synchro I had due to user error (I kept hanging onto 4th gear while driving so I wore down the 4th gear shift fork and synchros, causing the gearbox to lock into 4th gear.) it has been fine.

I keep hearing that my early gearbox bearings will explode from being mated to the torque monster that is the 200tdi, but it hasn't happened yet. In fact, during my rebuild, the old bearings were in great condition. I just replaced them all as preventative maintenance...nothing in that box showed me any signs of imminent failure.

I am otherwise a pretty gentle driver so maybe that counts for something.
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  #42  
Old July 6th, 2015, 04:52 PM
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Quote:
Originally Posted by Naplm00 View Post
I have a Suffix D in my 110 with a 200tdi and a 1.2 disco Tcase for about 55k

Runs great and shifts great. I use Redline MTL and it significantly improved shifts.


Also if you are pulling the trans keep in mind you may have to do a pivot arm, clutch and related seals once you get it apart
Man, I wasted a wad of dough on redline in my early 83 tranny. I was having no problem shifting but I also didn't know what was in it so I drained and replaced with redline. My tranny hated it with a passion so ended up switching basic DEX III and from the very first shift it was all good again.
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  #43  
Old July 6th, 2015, 05:23 PM
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Quote:
Originally Posted by JSBriggs View Post
Lav is a pro Tcase swapper. He should be you go to guy. Hell, he could probably do it for you, and all you would have to do is watch.

-Jeff
LO. I think there was some sarcasm there, but only because I can't sit still and watch someone work on a truck.

Quote:
Originally Posted by Jonesy View Post
Clay is always thinking ahead...

Yeah guys now you see my dilemma? Coupla grand versus putting a suffix D one in it and running with it - as Doug said he has had one since 2009 against a 200TDi...

shit.
Shit, I don't see a dilemma at all. Admittedly I haven't been paying close attention to what's actually going down here, but if all you are worrying about is the suffix and not a gearing difference, then hell yeah, let's just put that sucker in. Let's face it, you won't own the truck long enough to wear it out anyway .

I just need to rebuild my diffs (have all the parts now) and can free up a bay.

Otherwise talk to Dassler.
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I'm here for the D's
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  #44  
Old July 7th, 2015, 07:38 PM
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Quote:
Originally Posted by Red90 View Post
Okay. You have a D box. Not strong enough for a 200tdi. You want a G or H box. Maybe an F. A D will die again in short order.
How do you tell if the box is G H F A or D?
My PU 110 has a 200tdi & it is not original, second gear is on the way out.
I also have a spare transmission with transfer awaiting to be determined.
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  #45  
Old July 7th, 2015, 07:46 PM
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Quote:
Originally Posted by seaswood View Post
How do you tell if the box is G H F A or D?
My PU 110 has a 200tdi & it is not original, second gear is on the way out.
I also have a spare transmission with transfer awaiting to be determined.
It is the last letter in the serial number...first should be 51/56 or something 5x then a letter, then 6 or so numbers and a letter...which is referred to as a suffix.

Unless of course you have my freaking transmission!!!!!
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  #46  
Old July 7th, 2015, 07:49 PM
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Quote:
Originally Posted by Jonesy View Post
It is the last letter in the serial number...first should be 51/56 or something 5x then a letter, then 6 or so numbers and a letter...which is referred to as a suffix.

Unless of course you have my freaking transmission!!!!!
Thanks
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  #47  
Old July 7th, 2015, 08:50 PM
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Identify a LT77 gearbox?? - tr7triumph.com

Postby Workshop Help 31 Dec 2007 17:24
Try looking at the underside rim at the front of the gearbox. The number is probaly there. Our gearbox does not have the pedastile cast for the number stamping. It is a 'B' box, which indicates it was built during early production, and the number is stamped there on the underside rim.

If you do have an early gearbox, you are lucky. You input shaft is priced by Victoria British at about $100.00, versus about $270.00 for the later 'C' and up units. Please note, an early gearbox differs principally by having a smaller bearing than the later 'C' unit supporting the input shaft. This makes practically no difference for use on a 4-cylinder engine.
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  #48  
Old July 7th, 2015, 08:54 PM
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The only way if you don't have a serial number is something about the number of teeth on gears and if you have an oil cooler it can be a "S" suffix. There is a video posted above from Ashcroft that shows where the serial no is if that is your issue
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  #49  
Old September 21st, 2017, 03:36 PM
seaswood
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Lt77 & 230

LT77 56A mated to a 12D transfer case appears to be 1.6 ratio
With a 200tdi motor?
Will that combination work?
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  #50  
Old September 21st, 2017, 03:40 PM
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Quote:
Originally Posted by seaswood View Post
LT77 56A mated to a 12D transfer case appears to be 1.6 ratio
With a 200tdi motor?
Will that combination work?
1.6 not ideal. 1.4 works better behind the tdi, my opinion. The 56A is the serial, what's the suffix?
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  #51  
Old September 21st, 2017, 03:47 PM
seaswood
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56A0144575F
12D ends with A assuming 12A.
These are spare the tcase in truck will have to remove something to get that number.
But has a 50a ending in D second gear worn or pops out of. With 200tdi 110.
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