MrNasty

Well-Known Member

• May 10, 2014

• #1

I have a LT77 fitted to my V8 on carbs Hybrid, its got a slightly noisy first gear when cold and I think the primary shaft is noisy when the clutch is not engaged.
Last summer I changed the ATF oil, should I of changed it with a semi synthetic gear oil instead? If so what oil?
Speaking of the gearbox I might source a replacement box, would a Discovery LT77 be OK with regards to ratios or should I look for a LT85?

Your opinions and views on my box of cogs is appreciated.

 

jamesmartin

Well-Known Member

• May 10, 2014

• #2

a cog is a replaceable wooden tooth in a gear wheel ,atf is good if box is and if it isnt oil choice wont make long term benefits,lt85 isnt a great box ,in what landy a rrc ?

 

MrNasty

Well-Known Member

• May 10, 2014

• #3

Its a RRC Chassis, gearbox was from a RRC according to history when it was built in 1997.

 

Dr_evil

Banned

• May 10, 2014

• #4

Think theres an LT85 on ebay atm

 

MrNasty

Well-Known Member

• May 10, 2014

• #5

400 plus quid, I think I have just seen it, but what is the issues with the Lt85? Or should I just get another cheap and abundant LT77 from a disco?

 

jamesmartin

Well-Known Member

• May 10, 2014

• #6

personally id get disco r380 box as is direct replacement apart from difflock linkage and clutch pipe

 

MrNasty

Well-Known Member

• May 10, 2014

• #7

I though I read somewhere that the R380 box requires me to move the gearbox mounts back a couple of inches, and I suppose I would need a new tunnel cover to fit the new position of the diff lock lever?

 

jamesmartin

Well-Known Member

• May 10, 2014

• #8

MrNasty said:

I though I read somewhere that the R380 box requires me to move the gearbox mounts back a couple of inches, and I suppose I would need a new tunnel cover to fit the new position of the diff lock lever?

Click to expand...

short box is 4 cylinder defender ,all v8 boxes are long whether lt85 or lt77 or r380 as std

 

Dr_evil

Banned

• May 10, 2014

• #9

Or do what I had, machine the input shaft on short R380, use HD 300tdi clutch and an adaptor plate

 

MrNasty

Well-Known Member

• May 10, 2014

• #10

Ok, so the consensus seems to lean towards a R380 box, what other modifications are involved, tunnel cover change, what about the transfer box I have, its a 230 is that going to bolt on? and what about the diff lever linkage modification is that straightforward? As for the clutch hose, is that just a longer hose I need?

 

jamesmartin

Well-Known Member

• May 10, 2014

• #11

r380 is the same length as lt77 but because rear housing is longer to cater for rev gear diff lock linkage has a dog leg ,slaves on drivers side with an r380,

 

Last edited: May 10, 2014

gemsdad

NOT BOTHERED.

• May 10, 2014

• #12

jamesmartin said:

r380 is the same length as lt77 but because rear housing is longer to cater for rev gear diff lock linkage has a dog leg ,slaves on drivers side with an r380,

Click to expand...

that seems a better option than the one doc proposed imho.

 

Dr_evil

Banned

• May 10, 2014

• #13

Short r380 would keep original prop length

 

jamesmartin

Well-Known Member

• May 10, 2014

• #14

Dr_evil said:

Short r380 would keep original prop length

Click to expand...

if it was built as a v8 using a v8 box it will be disco length box ,though he would want defender spec gear change v8 r380

 

MrNasty

Well-Known Member

• May 12, 2014

• #15

It's all RRC running gear, so I have the long bellhousing already, so I am looking for a r380 from a v8 Discovery then? I would not need to adjust the prop lengths or anything major?