bell housing question

[AJChalmers@aol.com]

Anyone out there give me the differences between the TD and TC bell housings? Thanks.

[Robert Grunau]

71/4" TD and Morris 10 bell housings will fit a TC if you machine away the smaller TD bearing locating spigot and bore a larger diameter groove for the TC front bearing size. Then make up a steel ring to substitute for the TC spigot. Or, weld up the spigot area and re-machine to the larger TC diameter. The eight bolts line right up and the rest of the bell housing is the same. Of course the TC clutch operating arm is totally different but the clutch shaft is 5/8" on both TC and TD. Regards, Bob Grunau Anyone out there give me the differences between the TD and TC bell housings? Thanks. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.361 / Virus Database: 199 - Release Date: 5/7/02

[Clive Sherriff]

Bob, You said in a previous post on a similar subject that there was a Bellville washer between the Bell housing spiggot and the Mainshaft Input Shaft Bearing. Are you sure? I dont recollect this (there are washers INSIDE the box) and measuring a couple Boxes and Bell housings here in the workshop indicated there is no space anyway - and the washer could only be about an 1/8 inch wide Seems to me the spiggot just locates the bearing approximately but fixes the bell housing position accurately. Regards Clive ===================================== PREVIOUS MESSAGES I agree, the factory never fitted a gasket between the bellhousing and gearbox. The bearing extension spigot on the bell housing should contact the outer race of the front ball bearing to locate it. If you install a gasket on the main joint, no matter how "thin", the spigot will be pulled away from the outer race. Hence the bearing and input shaft can move back and forth in the gearbox casing. No good. The TC gearbox uses a flat and bellville washer behind the spigot to ensure some pressure on the outer bearing race. For unknown reasons, the TD/TF gearbox has none of these washers and so the bearing location depends entirely on the accuracy of the spigot extension. It may be a good idea on these gearboxes to install some belleville washers to ensure the spigot bears against the outer race. Regards, Bob Grunau ================================================== 71/4" TD and Morris 10 bell housings will fit a TC if you machine away the smaller TD bearing locating spigot and bore a larger diameter groove for the TC front bearing size. Then make up a steel ring to substitute for the TC spigot. Or, weld up the spigot area and re-machine to the larger TC diameter. The eight bolts line right up and the rest of the bell housing is the same. Of course the TC clutch operating arm is totally different but the clutch shaft is 5/8" on both TC and TD. Regards, Bob Grunau ================================== Anyone out there give me the differences between the TD and TC bell housings? Thanks. ============================

[Robert Grunau]

Hi Clive, Yes, there is a wide washer and a belleville washer behind the spigot on the bellhousing. The washers are OUTSIDE the box. Similar washer pair are installed at the rear ball bearing. Take a look at the TC Instruction Manual, page 76, item 5 for the rear bearing, item 9 for the bellhousing bearing. These washers are N11 and N12 in the TC parts book. Yes, the spigot diameter locates the bellhousing accurately and the spigot length and washers locate the end float ( which should of course be zero ). For some unknown reason, MG decided these washers were not required on the front bearing for the TD gearbox but did continue to install them on the rear ( center actually ) ball bearing. Do you have any extra TC gearbox parts? I need a cover/remote for a TC. I am going to rebuild a TC gearbox for a guy but somehow the remote/cover got lost while the car was in storage. He inherited the car in baskets from his father. I have an extra remote/cover in poor shape that will work but am trying to find a better one for him. Also, any extra TC bell housings? I have some TD ones that I can convert but would prefer to buy a TC one ready to go. Hopefully spring will arrive this week and I can get my TC out and on the road after a 5 year repaint job which included installation of a new body, new rear fenders , rebuilt engine and gearbox etc. Best regards, Bob Grunau You said in a previous post on a similar subject that there was a Bellville washer between the Bell housing spiggot and the Mainshaft Input Shaft Bearing. Are you sure? I dont recollect this (there are washers INSIDE the box) and measuring a couple Boxes and Bell housings here in the workshop indicated there is no space anyway - and the washer could only be about an 1/8 inch wide Seems to me the spiggot just locates the bearing approximately but fixes the bell housing position accurately. Regards Clive

[Robert Grunau]

Thanks Bob. I now recall that Al Moss sold me one of my three housings as a TC unit, which it is. I see the diiference. One of my TD units has a modified strengthened boss on each side for the cross shaft bearings-looks like they were responding at the factory to the inherent weakness in the original. That would be a late TD/TF unit with 3/4" cross shaft and re-inforced bosses. It also has a slightly greater front to back location of the cross shaft to clear the late TD/TF 8" clutch. This bellhousing can also be modified to suit the TC however the cross shaft location may require a slightly greater offset throw-out bearing to compensate for the different cross shaft location. Bob Grunau --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.361 / Virus Database: 199 - Release Date: 5/7/02

[David Lodge]

Sorry, no idea of the differences ,if any, but somehow I do have a TD clutch lever still on cross shaft that I would gladly trade for a TC ditto; if anyone's interested. David Lodge.

> 71/4" TD and Morris 10 bell housings will fit a TC if you machine away the > smaller TD bearing locating spigot and bore a larger diameter groove for the > TC front bearing size. Then make up a steel ring to substitute for the TC > spigot. Or, weld up the spigot area and re-machine to the larger TC > diameter. The eight bolts line right up and the rest of the bell housing is > the same. Of course the TC clutch operating arm is totally different but the > clutch shaft is 5/8" on both TC and TD. > Regards, Bob Grunau > Anyone out there give me the differences between the TD and TC bell > housings? > Thanks. > > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.361 / Virus Database: 199 - Release Date: 5/7/02 > > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >