Maybe a thought to consider: might this be a clutch problem, rather than a
gearbox problem? I wonder if your clutch is disengaging right near the
bottom of its travel. If so, it might be worthwhile to adjust the clutch
release point a bit higher.
If not, maybe add a small bit of "Molyslip" or other Molybdenum disulfide
additive to the gearbox fluid.
"Bob D." wrote:
>
> Wow! My TD has the exact same symptom, right down to the 30 minutes! I wonder
> if we have the same problem? I figure the time factor must be related to
> something heating up. Now the TD doesn't have synchromesh in 1st, so
> synchromesh can't be the problem in my case. (And, I religiously come to a
> complete stop before shifting into first.) When 1st gets too cranky, I just
> start up in 2nd. With the stock 5.125 rear end on the TD, 1st is a bit of a
> granny gear anyway.
>
> The time/temperature angle makes me wonder if the viscosity of the oil has
> something to do with the problem. This is just a theory, but maybe the Redline
> MTL I'm using is too thin at temperature. Or perhaps, the problem is really a
> worn part that functions better when the oil is thicker/colder. I'm tempted to
> try a heavier gear oil. This may be a "Band-Aid", but if it works what the
> heck.
>
> I'm going to cross post this to the mg-t list, maybe someone there has an
> idea.
>
> Bob Donahue (Still stuck in the '50s)
> Email - bobmgtd@insightbb.com
> 52 MGTD - NEMGTR #11470
> 71 MGB - NAMGBR #7-3336
>
> ----- Original Message -----
> From: Mark D
> To: MG-MGB@yahoogroups.com
> Sent: Monday, April 14, 2003 7:02 PM
> Subject: [MG-MGB] Tightness in 1st Gear - Warm Engine
>
> Greetings all,
>
> When my '78 MGB is "cool" - just started driving, all
> the gear changes are smooth. When I've driven about
> 30 minutes it's real reluctant to go into first gear
> out of neutral. But, only into first gear... second
> through fourth are fine at all times. Any ideas what
> causes this?
>
> Thanks,
-Rock http://www.rocky-frisco.com
--
"JJ Cale Live" CD & Video: http://www.rocky-frisco.com/calelive.htm
The Rickey Preston Band (w/Rocky): http://www.rickeyprestonband.com
The Wednesday Night Science Project: http://www.wednitesciproj.us
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-t
|