Jump to content

? gearbox dims?


robhybrid
 Share

Recommended Posts

Hi does anyone know:-

The length of the lt77 defender box from engine flange to rear/front prop out.

The length of R380 defender box from engine flange to rear/front prop out.

The lenght of V8 auto box from engine flange to rear/front prop out.

Auto conversion is getting closer although I dont know if I will fit it to my challenge truck or another toy for experementing?

Link to comment
Share on other sites

Hi does anyone know:-

The length of the lt77 defender box from engine flange to rear/front prop out.

The length of R380 defender box from engine flange to rear/front prop out.

Depends on the bellhousing. See my album ('Galleries' at the top, then Astro_Al a few pages in) for pics of a 'stumpy' R380 bellhousing. 11cm long. If you are looking to squeeze things into a small space, this is the shortest.

I just looked through the repair manual, but can't see dims for the R380 I'm afraid...

Nor the LT230... :(

There's a little bit of R380 data here: http://www.rpiv8.com/transmission-3.htm

Apparently the LT77 and R380 are dimensionally very similar, just little things like mounting points which are different.

Hope that gets you started, Al.

Link to comment
Share on other sites

Rob, Is your truck V8?

The R380 and ZF will most likely be the same length - anything fitted to a V8 seems to have the longer bell housing which is somewhere between 4" & 6" longer than an LT77 fitted to other engines. IIRC, there is a short bell-housing available for some of the above though.

Si

Link to comment
Share on other sites

I currently have an lt77 with adaptor plate to izusu,

I am looking at what difference in length there is in fitting a zf auto.

Can I get away with moving my gearbox to r380 possition and not moving my engine foreward?

Or will I need to move my engine forward aswell, and by how much?

Link to comment
Share on other sites

Ive done an Isuzu/ZF combo in an 88 with S2a front bodywork and it fits without too much hassle but if you have used a shorter bellhousing then the box is going to move backwards relative to what you have now. Its easier (IMHO) to shift the box back rather than the engine forward unless you have a load of free space at the front of the engine bay? if you use radius arm bushes to make the engine mounts you dont have to factor in as much space for engine shunt in the even of a tree leaping out in front of you :blink: sneaky buggers those tree things...

on the auto front try and get an early 4 speed ZF - although not as strong the shift pattern suits the Isuzu a bit better but you will have to run a big intercooler and find the extra ponies to cope with the slush box - to be honest I wont do the same conversion again, I think the LT77/R380 suits it much better

Cheers

Jez

Link to comment
Share on other sites

reason for auto would be challenge use.

I have yet to see that power is god off road.

My truck is nowhere near as powerfull as some out there and I dont feel that I have lost any competative margin.

As long as it will sit at 70 for the ocasional motorway run (i.e. traveling down to Tony C) then I think I shall be happy ;)

Link to comment
Share on other sites

Ive run 2, the first generation 3.5V8 ZF (suffix 15somthing if memory fails properly) was the best suited in terms of shift pattern but the box itself isnt particularly combat resistant. I used one of the first of Daves monster boxs from Ashcrofts in the last bus and that takes its shift pattern from a 3.9 but if I remember correctly Dave tailored it to the diesel pattern, it was ok in terms of shift pattern but it really needed more horse dialing in from the engine to keep it pushing along. Good tough box - shocked it survived to be honest :blink:

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy