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Re: Gear Shift Rattle [Re: Gwyn D] #718066
14/09/21 08:00 PM
14/09/21 08:00 PM
Joined: Sep 2016
Posts: 816
Chester, UK
Grumpy2 Offline
Talk Morgan Regular
Grumpy2  Offline
Talk Morgan Regular

Joined: Sep 2016
Posts: 816
Chester, UK
Ahhhh, Gwyn. I hate to be the messenger of doom but some years ago I had this exact same issue with an LT77 installed in my MGB V8 conversion. Changed all the bushes in the remote to no avail, tried fresh oil in the gearbox too, even some fancy additive. Still buzzy rattle in 3rd.

Ended up rebuilding the gearbox as one of the intermediate bearings had too much play. As I did everything myself it only cost me about £20 in parts but took hours and hours to get to.

I hope you can solve yours much more easily than I did

Sorry


94 plus 8 in Westminster Green - I think!
Re: Gear Shift Rattle [Re: Gwyn D] #718088
15/09/21 06:56 AM
15/09/21 06:56 AM
Joined: Sep 2014
Posts: 2,001
London
MOG 615 Offline
Talk Morgan Expert
MOG 615  Offline
Talk Morgan Expert

Joined: Sep 2014
Posts: 2,001
London
I think you need to establish which gearbox you have. At the age of your car I would expect an R380 rather than an LT77, but with MMC you never know........

Easy to identify , is reverse gear underneath 5th ? If so you have an R380, if it is alongside 1st then you have an LT77.

Once you have this data then you can hone in on the correct procedures and information.

I am afraid that Gary may be correct , the troubles solved by the cup and the rubber/PU bushes are difficulty in getting gears rather than a buzz/rattle. I do hope the easy fixes cure it for you. If not then you will need to remove the box from the car and either dismantle it , or get it done by a specialist (of which there are many)


Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
Re: Gear Shift Rattle [Re: Gwyn D] #718113
15/09/21 10:16 AM
15/09/21 10:16 AM
Joined: May 2010
Posts: 8,109
Llanelli
sospan Offline
Talk Morgan Guru
sospan  Offline
Talk Morgan Guru

Joined: May 2010
Posts: 8,109
Llanelli
The cup....UKC3159 part number (embedded in my memory!). Rarer than fresh dinosaur poo!
I managed to find one and it has reinforced lugs welded to the bracket. I cobbled a temporary fix on the original about 6 years ago and it took me until last year to find a new one! I’ll be fitting it soon. I have the R380 box. Bushes are good and gearchanges were better with the cobbled repair. I spray some light grease down the top annually help the movement.

Last edited by sospan; 15/09/21 10:17 AM.

Red Plus8
Re: Gear Shift Rattle [Re: Gwyn D] #718116
15/09/21 10:54 AM
15/09/21 10:54 AM
Joined: Jun 2015
Posts: 894
North Somerset, UK
Deejay Offline
Talk Morgan Regular
Deejay  Offline
Talk Morgan Regular

Joined: Jun 2015
Posts: 894
North Somerset, UK
Have to concur with Grumpy2 and MOG 615: If it only happens in third gear then it seems highly unlikely that it is associated with all the bits that are common to gear lever and gear selection in general, but as they are relatively easy to get at, (compared to gearbox extraction) nothing lost in checking them out.


Doug

2011 +4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
Re: Gear Shift Rattle [Re: Gwyn D] #718172
15/09/21 07:28 PM
15/09/21 07:28 PM
Joined: Jul 2012
Posts: 1,573
Purton, nr Swindon UK
R
rainbowj Offline
Talk Morgan Enthusiast
rainbowj  Offline
Talk Morgan Enthusiast
R

Joined: Jul 2012
Posts: 1,573
Purton, nr Swindon UK
Originally Posted by Gwyn D
It’s the Rover 5 speed box I believe…which is as much as I know I’m afraid 😳!

If reverse is to the left and forward it is a LT77 gearbox. If to the right and back it is a R380 box.


John
1992 plus4 connaught green
Re: Gear Shift Rattle [Re: Gwyn D] #718196
15/09/21 09:46 PM
15/09/21 09:46 PM
Joined: Apr 2014
Posts: 5,079
Llanelli
Ray Offline
Charter Member
Ray  Offline
Charter Member

Joined: Apr 2014
Posts: 5,079
Llanelli
Had a LT 77 gearbox for 18 years in my +8 ,never had an unwanted noise from it.


.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
Re: Gear Shift Rattle [Re: Gwyn D] #718203
15/09/21 11:09 PM
15/09/21 11:09 PM
Joined: Oct 2020
Posts: 7
G
Gwyn D Offline OP
New to Talk Morgan
Gwyn D  Offline OP
New to Talk Morgan
G

Joined: Oct 2020
Posts: 7
Oh dear! But thanks to all for your experiences and advice.

So reverse gear is far right and under 5th making it the R380 gearbox then.

I will check the bushes and cup as that seems easy to do, but have to agree with all who suggest that if the problem is the bushes or cup, then it would surely affect all gears not just 3rd.

It is what it is - keep you posted!

Thanks again 👍

Re: Gear Shift Rattle [Re: Gwyn D] #718220
16/09/21 07:44 AM
16/09/21 07:44 AM
Joined: Jul 2007
Posts: 20,724
Suffolk
John V6 Online content
Brooklands Register contact
John V6  Online Content
Brooklands Register contact
Member of the Inner Circle

Joined: Jul 2007
Posts: 20,724
Suffolk
My cup was not fully broken and it only affected 3rd.


JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Gear Shift Rattle [Re: John V6] #718341
17/09/21 08:31 AM
17/09/21 08:31 AM
Joined: Oct 2020
Posts: 7
G
Gwyn D Offline OP
New to Talk Morgan
Gwyn D  Offline OP
New to Talk Morgan
G

Joined: Oct 2020
Posts: 7
I have to say, when the noise first started, it didn’t even cross my mind that it was a gearbox issue per se.
It just didn’t seem that sort of noise - the rattle seemed to emanate from the shifter area, not from down inside the gearbox.
The only noise is the stick rattling. So I dunno, wishful thinking maybe but I’ll keep my fingers crossed.
Incidentally, I’m away at the moment so unable to check the bushes and cup, but when I do check I’ll post my findings.
Many thanks again all, much appreciate the help and advice. 👍

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