Thread: 1971 Series 2a Ex Army Gearbox Question

If it is a suffix B box with original transfer case, it may be fitted with a much sought after 44/22 intermediate gear that has the larger shaft and bearing as used on later gear boxes. That particular gear was only used on "B" boxes.
.W.

Originally Posted by B.S.F.

If it is a suffix B box with original transfer case, it may be fitted with a much sought after 44/22 intermediate gear that has the larger shaft and bearing as used on later gear boxes. That particular gear was only used on "B" boxes.
.W.

Thank you for that info...can you confirm which cogs im actually counting teeth on for the 44/22?

Would this make any difference to my 1st/reverse rotating thudding or am i still on the right path that new lay bearing, fresh 1st lay and should be ok?

Sorry for the confusion. It has got absolutely nothing to do with your problem. I just wanted to make you aware of a feature of a "B" box Transfer Case
The "B" box (transfer case) has got a lower low range ratio but with the advantage of a bigger ,stronger shaft than a 'C" on.(T/C)
.W.

Originally Posted by B.S.F.

Sorry for the confusion. It has got absolutely nothing to do with your problem. I just wanted to make you aware of a feature of a "B" box Transfer Case
The "B" box (transfer case) has got a lower low range ratio but with the advantage of a bigger ,stronger shaft than a 'C" on.(T/C)
.W.

Thanks! Good information to know.

As you seem to be knowledgeable on LR Series do you think im on the right path to solve this noise? I would love to not pull it down again once back together!

I' m sorry I can't help you with that. By studying workshop and parts manuals you should be able to work things out.
.W.

Originally Posted by AndrewSeries2a

Thanks for the extra information...but now i am a bit confused.

Can i just confirm that shot peening is the rounding on the teeth? if i understand correctly you are saying i should not have the rounded teeth.

I did check and my lay 1st has 15th teeth rather than 14 in the later model. I also have checked my suffix and for the life of me i cant find a letter. i have attached pictures of the numbers on the box in all locations.

i have also attached a reverse gear picture incase that helps (ignore my bearing surround removal tool i knocked up!)

Can anyone confirm any further details off the pictures? If I'm understanding the previous comments is there a chance that i should have the the 14 teeth first lay? The 14 teeth first gear lay actually looks to matched my reverse...

Sorry if i have completely mixed this up...

***Edit - see below post***

Attachment 171641Attachment 171642Attachment 171643Attachment 171644

No, the shot peening/blasting was on those splines near the gear. Mine sheared at those splines. Common problem I believe.
From a very distant memory going back to the 80's when I'd have done my last Ser 2a box, the g/box number was at the rear of the maincase at the top near where the top cover/selector cover/hsg is.????????
The shot peening will be very easy to see with a modified lay gear.

One other thing, if you assemble the box and rotate the mainshaft when in first and reverse gears I am certain you will feel the mismatch if it is still there with the new gears.

I had no probs feeling it when rebuilding Mini gearboxes in the 60's.

You could also put some "bearing blue" paste on the teeth and look at the swiping pattern when they mesh, but again, I have no doubt you'll feel the mismatch if present.

The mismatch is only miniscule so to speak and won't prevent the gears from turning as that is what APPEARS to be your problem.
At least we are all assuming that is your problem, but it does sound like it to me.

You may be able to get more definitive info from an LR (UK) website or talk to a UK Parts specialist who would be very familiar with this problem.

Sorry I am not of much help but the early 80's was the last time I played with such a box.

Of course you might not have the original gearbox; anything could have happened over the years!!