Pyrover Posted February 1, 2007 Share Posted February 1, 2007 Can anyone tell me whether the LT77 51A gearbox I have on my 84 110 is original for the year, only I seem to remember reading somewhere on the net that it's a military gearbox, is this right? The 110 was originally a 2.25 petrol (according to the code) but is now a 2.5NA, however the V5 says: model/type 110 V8 SW D I can see no sign of a V8 having been fitted, I assume that the engine mounts would have needed to have been altered for a V8 to have been fitted. Assuming that the gearbox would not have been fitted with a V8, is the gearbox correct for a diesel or petrol or does it not make much of a difference as the gearing in the transfer box is more crucial, therefore was this gearbox originally fitted to either fuel type? Any help would be appreciated as I'm trying to figure out what's orignal and what's not. While I'm on the subject of gearboxes; is it possible to fit a cross-drilled gear on this type of LT77, only the backlash on it's a SOB (although she does need new bushes)? Cheers. Quote Link to comment Share on other sites More sharing options...
Pyrover Posted February 1, 2007 Author Share Posted February 1, 2007 Sorry being a bit of a noggin , didn't mean cross-drilled gear on the gearbox, I meant LT230, I have a 12A, but information is irrellevant now as I've found the answer to this question under the following thread. "One for Mr Ashcroft or other gearbox gurus, LT230 input gears" - posted by FridgeFreezer. However I'm still looking for any info on the gearbox if you can help. Quote Link to comment Share on other sites More sharing options...
western Posted February 1, 2007 Share Posted February 1, 2007 (edited) LT77 serial numbers from the LR 110 1987 on parts book 50A used in 4 cylinder engined vehicles 56A 200Tdi 1991 model year on 60A V8 61A V8 with oil cooler I seem to remember the 51A being a military version with IIRC a lower 1st & 2nd gear from the standard civilian gearbox Edited February 1, 2007 by western Quote Link to comment Share on other sites More sharing options...
jericho Posted February 1, 2007 Share Posted February 1, 2007 Yes 51a was a military gearbox with lower 1st and 2nd,and lower fifth - 0.8314:1 Quote Link to comment Share on other sites More sharing options...
Pyrover Posted February 1, 2007 Author Share Posted February 1, 2007 Thanks guys, obviously the gearbox was changed when the engine was fitted, would have thought this was to get better top end performance out of the lower reving diesel. Any idea whether the LT230 12A would have been original or do you think this is also a replacement? I suspect that because of the year that the 12A is original fit, mind I did think that about the gearbox....! Quote Link to comment Share on other sites More sharing options...
western Posted February 1, 2007 Share Posted February 1, 2007 no 12A LT230 transferbox listed in the parts book, reckon it's a military spec box as well. Quote Link to comment Share on other sites More sharing options...
Pyrover Posted February 1, 2007 Author Share Posted February 1, 2007 Thanks for the help, much appreciated. Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted February 1, 2007 Share Posted February 1, 2007 my military parts book shows the 22D (90) and 20D (110) transfer box fitted to the 51A prefix LT77.... although that's only for two particular contract numbers. I'm sure Mr Ashcroft casn shed some more light on the subject. Quote Link to comment Share on other sites More sharing options...
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