Results 1 to 10 of 34

Thread: Looking for a Series 3 gearbox, LT76, preferably a later one

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #11
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    234

    Default

    Week #3 [ Update ]
    So I got my first round of parts for the outer gearbox in. Looks like they all fit. In classic Land Rover fashion, everything just takes 2 weeks to get to me by mail. But, the good news is most of these parts are still available new, with the exception of the gearbox casing. FYI.

    This week, I went diving into the parts manual to look at what parts I need, and if I can benefit from any "upgrades" over the years. My thinking is : if I have to buy 100% new parts (I'm building a gearbox from scratch) then I don't have to worry about re-use. I can get whatever is needed to upgrade to the better part. I found some interesting stuff below...

    Suffix part interchange - Layshaft
    I've attached the pages from the Series 3 Official Parts Catalog on the Layshaft, for reference.
    Click image for larger version. 

Name:	20220507_135155.jpg 
Views:	99 
Size:	87.2 KB 
ID:	13959

    I'd seen in James Taylor's book above a mention that between the Suffix "A" and "B" Land Rover had beefed up the Reverse gear mechanism. Looking through the parts catalog, it shows 2 diagrams...but keen eyed readers will see that most of the part numbers are the same. So, that tells me that the only change in the Layshaft assemblies is the Reverse shaft. Looking at the next page, there is a "Reverse Modification Kit" that seems to fix the Suffix "A" issues, and upgrade the weakness. The difference in parts comes down to they replaced a brass bush with a bearing. This made for a new reverse shaft and the reverse gear(where the bearing/bush fits into). Looks like the "Kit" just gives you the "B" shaft and reverse gear. The layshafts also are matched...so if you want the upgrade you need the "B" layshaft. All the bits in front of the layshaft are interchangeable between A + B. And the back bearing is the same. So, that tells me that the Layshafts are interchangeable in the case (A & B). So I'm going to order the "B" Layshaft and Reverse shaft, and basically have a "Reverse Modified Kit Suffix A"...or essentially a Suffix B innards. Seems that C kits are the same in this respect (the Layshaft), so this info applies to them, too. Only when you get to "D" suffixes do you get different part numbers, and I suspect that's more to do with the electroplating on the gear surfaces than dimensional differences.

    I made up a parts order, and added it to the spreadsheet, here:
    https://docs.google.com/spreadsheets...it?usp=sharing

    I'll let you al know how it goes, and appreciate any insights I missed.
    Attached Images Attached Images  
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ .........° |°... | ..__....p
    »»└/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
About us
Unparalleled product knowledge. Our mission is to support all original Land Rover models no longer supported by your local Land Rover franchise. We offer the entire range of Land Rover Genuine Parts direct from Land Rover UK, as well as publish North America's largest Land Rover publication, Rovers Magazine.
Join us