Jump to content
Sign in to follow this  
twodoorgaz

rebuilding LT77 with stumpy R380 input shaft

Recommended Posts

Quick one folks:

An LT77 box is 1 inch shorter than an R380

A 'stumpy' R380 comes with a belhousing (FTC4018) and an input shaft (FTC5056) that is 1 inch shorter than those on the LT77 4-cyl box to make it a direct replacement. These have recently gone back into production so the parts while not cheap, are available.

NB I'm only looking at the main boxes, excluding transfer box for the time being.

So could a LT77 be rebuild with the 'stumpy' R380 components in order to get the shortest possible 5-speed box? (i.e. 30mm shorter than a standard Lt77).

Appreciate its a full rebuild to change the components.

I don't have both bell housings in front of me so can't tell if the bolt pattern is the same, also don't have the pinions but from photos online they look to be pretty much identical - both 21 teeth.

Share this post


Link to post
Share on other sites

stumpy R380 is a direct swap for the LT77 on all pre 300tdi 4 cylinder petrol & diesel engines, so bolt pattern on bell housing is the same. I've had a stumpy R380 on ex TD/LT77 110CSW since 1994.

Share this post


Link to post
Share on other sites

Bearing sizes are different and It wouldn't surprise me if the space between main shaft and Layshaft is different. Ashcrofts might be best to ask.

Share this post


Link to post
Share on other sites

Good shout, thanks - I'll give Dave a call nd will check the parts analogues for bearings in the meantime. Might save an inch if it works.

Re: the bell housings - it was the bolt pattern for the bell housing to mainbox I'm not sure about (rather than bell housing to engine)

Share this post


Link to post
Share on other sites

Don't know if stumpy R380 bell housing is a direct swap at the gearbox joint, I'm sure Mr Ashcroft will be able to advise

Share this post


Link to post
Share on other sites

Bearings size and synchro size is different between R380 and lt77. I tried to the the reverse, put an lt77 pinion into a r380.

There might be some late lt77's with larger bearings (super rare) but the synchro in the r380 is much larger so still not compatable.

Share this post


Link to post
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.

Sign in to follow this  

×
×
  • Create New...

Important Information

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