[ROVERNET - UK] SD1 Gearbox

[Kent Kinard]

Hi Nick,
If you have driven the replacement transmission and it 
works normally, simply flush it with kerosine and refill 
with synthetic gear oil.

Kent k.

On Wed, 31 Jan 2007 20:44:41 -0600
  "Nick and Laurie Hand" <flynp170 at cablelynx.com> wrote:
> Hi Kent,
> Just a recap of how I got to this point. I bought the 
>car in Oregon with a
> bad transmission. I purchased a used transmission  from 
>Rover shop in
> Oregon. Prior to installing replaced front & rear seals, 
>did a cursory
> visual inspection, of what I could see. Transmission had 
>a bearing noise
> from the beginning. 7000 miles now and does not seem to 
>be any worse; but I
> don't want to drive it to destruction. The plan was to 
>drive this engine and
> transmission a couple of years and  rebuild the engine 
>and transmission in
> my parts car, to have a replacement on hand. I've driven 
>parts car .
> Transmission is quiet and behaves normally. If I could 
>replace the front
> bearing with out splitting the case I thought it might 
>be worth while.  Nick
>From: "Kent Kinard" <kkinard at wcc.net>
> To: <rovernet at lyris.ccdata.com>
> Sent: Wednesday, January 31, 2007 7:43 PM
> Subject: Re: [ROVERNET - UK] SD1 Gearbox
> 
> 
>> Hi Nick,
>> I've never done it.  RPI developed this replacement many
>> years ago, but I'm not sure they even supply the parts 
>>any
>> more.  I think it requires spliting the case and 
>>removing
>> the first motion gear and doing some machining to it in
>> order to fit a roller bearing to the front end of the
>> mainshaft.  I'v never really seen this done, only heard
>> about it.
>>
>> If the LT77 is not damaged, simply replacing the 
>>bearings,
>> shimming properly according to the shop manual, and
>> changing the trans fluid often should be good for 80k
>> miles.  Swarf is the enemy of these transmissions.  It
>> eats up or jams the oil pump.  Also, even a few miles of
>> towing with the rear wheels on the ground is enough to
>> destroy the trans, so always disconnect the driveshaft 
>>or
>> tow it like you would an automatic with the front wheel 
>>on
>> the ground.
>>
>> I don't think it's a good idea to just swap in an 
>>unknown
>> transmission without a teardown and inspection.
>>
>> Roverly,
>> Kent K.
>>
>> On Wed, 31 Jan 2007 17:00:33 -0600
>>   "Nick and Laurie Hand" <flynp170 at cablelynx.com> wrote:
>> > My SD1 gearbox [5speed] has a bearing noise and I 
>>intend
>> >to replace it with
>> > one from my parts car. I read this on RPi engineering
>> >web site "Having
>> > supplied many reconditioned units in the past, we
>> >developed a replacement
>> > for this taper bearing, using a heavy duty non-tapered
>> >one. This can be
>> > fitted with very little fuss and ensures a more 
>>precise
>> >allignment for many
>> > many thousands of miles."   Anyone replaced the front
>> >bearing with a non
>> > taper one? Thanks Nick
>> >
>> >
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