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Rebuilt Box or Rebuild Box


Pyrover
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Need to get my LT77 overhauled for this summer and was looking into getting a replacement one from Ashcroft's, however at around £400 for a rebuilt box I was thinking that it might be better to buy the specialist tools and do the work myself. Although this may be the harder route and may not prove the cheaper option either (depends on the cost of the tools or how easy the tools are to knock up).

I normally work on the principal that if I can get the tools and parts for half the cost of someone else doing the work I can bu&&er it up once (the so called learning curve) and it's still not cost more than the rebuilt one and in the end I will still have the tools and the knowledge when it comes time to rebuild another one, thus saving in the long run. <_<

However....

I have never pulled the LT77 apart (or any Land Rover box for that matter) so have no idea how hard it is to rebuild, however, I do have a copy of the overhaul manual for the box, I come from a family of engineers (although I'm not one) and as such have access to a good range of tools and also have access to a CNC machinist.

What are peoples thoughts on a rebuild? :unsure:

M@

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Need to get my LT77 overhauled for this summer and was looking into getting a replacement one from Ashcroft's, however at around £400 for a rebuilt box I was thinking that it might be better to buy the specialist tools and do the work myself. Although this may be the harder route and may not prove the cheaper option either (depends on the cost of the tools or how easy the tools are to knock up).

I normally work on the principal that if I can get the tools and parts for half the cost of someone else doing the work I can bu&&er it up once (the so called learning curve) and it's still not cost more than the rebuilt one and in the end I will still have the tools and the knowledge when it comes time to rebuild another one, thus saving in the long run. <_<

However....

I have never pulled the LT77 apart (or any Land Rover box for that matter) so have no idea how hard it is to rebuild, however, I do have a copy of the overhaul manual for the box, I come from a family of engineers (although I'm not one) and as such have access to a good range of tools and also have access to a CNC machinist.

What are peoples thoughts on a rebuild? :unsure:

M@

Stripping the box is complex, the specialist tools are v expensive, its not the same as a series box which comes undone in 20 mins with 4 spanners, you need a big hydraulic press for a start. Get a recon from ashcrofts less hassle. Thats what I did when my R380 gave up.

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I have rebult my gearbox with only a proper hydraulic puller (with all the bits), a length of tube with a plate welded on the end and a workmate.

Although it is fairly coplex if you follow the manual you cant go far wrong.

Just dont drop the roll pin in when your on the home straight :rolleyes:

Its worth a bash if only to discover how they work.

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I'd say having rebuilt several LT77's the only special tool you need is the puller to get the sleeve off the rear of the mainshaft. However I've always managed to chat up one of the mechanics at my local landrover specialists to get them to pull it off for me for a drink in the past.

Otherwise you need a decent gear puller, (although its possible to do it without) I dail gauge, and a decent normal tool kit. Decent large criclip pliers are also needed.

Two questions however. Whats wrong with the box, and what suffix is it? Some parts for some suffixes of gearbox are difficult to get hold of now.

Also bear in mind the this box uses selective shims to set it up. I've a collection of these now, taken from old dead gearboxes, but if you have none, they are expensive (£8 odd each) and its a matter of trying a few until you get it right........not only gets expensive, but very frustrating as it takes a few days each time to get them ordered in!

Otherwise, have you ever rebuilt a box before? These are alot more complicated than a series box and theres alot more to get wrong!

Jon

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Otherwise you need a decent gear puller, (although its possible to do it without) I dail gauge, and a decent normal tool kit. Decent large criclip pliers are also needed.

Got all those.

Two questions however. Whats wrong with the box, and what suffix is it? Some parts for some suffixes of gearbox are difficult to get hold of now.

Gearbox has ususal wear on the shaft.

It's a military version of the LT77 (51A) ...is that going to be a problem?

Also bear in mind the this box uses selective shims to set it up. I've a collection of these now, taken from old dead gearboxes, but if you have none, they are expensive (£8 odd each) and its a matter of trying a few until you get it right........not only gets expensive, but very frustrating as it takes a few days each time to get them ordered in!

Time is probably not going to be an issue, and from what you say about the tools needed, I'm not going to have to fork out for lots of expensive specialist one, so therefore the shim costs should not be a major issue either (still cheaper than £400).

Otherwise, have you ever rebuilt a box before? These are alot more complicated than a series box and theres alot more to get wrong!

I've pulled a box apart before, but not a Land Rover one, but what the hell in for a penny... :blink:

Cheers Jon.

M@

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