Riley gearbox, again

[Jennifer and Hugh Pite]

Subject: Riley gearbox, again Many thanks to all those who sent information about using a Riley RM 1 1/2 litre gearbox in place of a TC gearbox. Here is what I have found out: 1. The complete gearbox can be used if the bellhousing, shift extension and rear cover (mount) are replaced and the 1st motion shaft lengthened slightly where it fits into the flywheel. (I'm looking for these parts!) 2. The case and all the mainshaft gears are the same as TC. 3. First, second and third are each lower geared by the same amount which is about 15%. Fourth is straight through the mainshaft on both units so they are the same 1:1. 4. This means that the gear on the 1st motion shaft and the gear on the cluster where it engages is different from the TC . That is, the first motion gear on the Riley will be bigger in diameter (1 or 2 teeth?) and that on the cluster will be correspondingly smaller. This will give a constant (15%) lower gearing on the Riley for the first 3 speeds. ( Heavy car, relatively small engine). 5. If a 4.55 (Morris) differential is used with the Riley gearbox then the first three final ratios will be within 4% of the stock TC but 4th will now have a final ratio of 4.55 instead of 5.125. Is this a good thing? Regards, Hugh whose "parts" TC is finally almost all collected in one place. [Non-text portions of this message have been removed]

[Donald Wilkinson]

Hey Hugh/Jenn: A. Wonder if the Riley/(Morris?) box is as tough as the TC? Sounds like wide intermediate ratios (bad) together with taller final (good). Betcha you wouldn't like it, + sounds like a hassle to try it. On balance, gimme the closer TC intermediates with the 9/41 final (minimum). Quite naturally, with enough HP to carry it. Need 100 HP minimum. Don TC 7993

>From: Jennifer and Hugh Pite jenntoo@shaw.ca> >To: mg-tabc@yahoogroups.com >Subject: [mg-tabc] Riley gearbox, again >Date: Fri, 26 Apr 2002 17:59:04 -0700 > > >Subject: Riley gearbox, again > > >Many thanks to all those who sent information about using a Riley RM 1 1/2 >litre gearbox in place of a TC gearbox. Here is what I have found out: >1. The complete gearbox can be used if the bellhousing, shift extension >and rear cover (mount) are replaced and the 1st motion shaft lengthened >slightly where it fits into the flywheel. (I'm looking for these parts!) >2. The case and all the mainshaft gears are the same as TC. >3. First, second and third are each lower geared by the same amount which >is about 15%. Fourth is straight through the mainshaft on both units so >they are the same 1:1. >4. This means that the gear on the 1st motion shaft and the gear on the >cluster where it engages is different from the TC . That is, the first >motion gear on the Riley will be bigger in diameter (1 or 2 teeth?) and >that on the cluster will be correspondingly smaller. This will give a >constant (15%) lower gearing on the Riley for the first 3 speeds. ( Heavy >car, relatively small engine). >5. If a 4.55 (Morris) differential is used with the Riley gearbox then the >first three final ratios will be within 4% of the stock TC but 4th will now >have a final ratio of 4.55 instead of 5.125. Is this a good thing? > Regards, Hugh whose "parts" TC is finally almost all >collected in one place. > > >[Non-text portions of this message have been removed] > > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >

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[Jennifer and Hugh Pite]

Hi Don, the point I was trying to make was that the guts of the Riley gearbox are identical to the TC's with the exception of a couple more teeth on the 1st motion shaft and a couple less on the engaging cluster. The other parts could be used in your TC box. It is not the same as a Morris 10 box where absolutely none of the components are the same as TC's (or Riley's). Hugh Pite

----- Original Message ----- From: "Donald Wilkinson" digitaldon@hotmail.com> To: jenntoo@shaw.ca>; mg-tabc@yahoogroups.com> Sent: Friday, April 26, 2002 7:40 PM Subject: Re: [mg-tabc] Riley gearbox, again > Hey Hugh/Jenn: > > A. Wonder if the Riley/(Morris?) box is as tough as the TC? Sounds like wide > intermediate ratios (bad) together with taller final (good). Betcha you > wouldn't like it, + sounds like a hassle to try it. > > Don > TC 7993 >

[Donald Wilkinson]

Yeah, but is it as tough as the TC box? I only own one, but have yet to break it. You mention the "1st motion" i.e. "low" gear being lower (higher numerically), thus a "creeper" gear. Who would need it? I have no trailer hitch on my TC, (not even for the Hobie). Don

>From: Jennifer and Hugh Pite jenntoo@shaw.ca> >To: Donald Wilkinson digitaldon@hotmail.com> >CC: mg-tabc@yahoogroups.com >Subject: Re: [mg-tabc] Riley gearbox, again >Date: Fri, 26 Apr 2002 20:23:39 -0700 > >Hi Don, the point I was trying to make was that the guts of the Riley >gearbox are identical to the TC's with the exception of a couple more >teeth >on the 1st motion shaft and a couple less on the engaging cluster. The >other parts could be used in your TC box. It is not the same as a Morris >10 >box where absolutely none of the components are the same as TC's (or >Riley's). > Hugh Pite > >----- Original Message ----- >From: "Donald Wilkinson" digitaldon@hotmail.com> >To: jenntoo@shaw.ca>; mg-tabc@yahoogroups.com> >Sent: Friday, April 26, 2002 7:40 PM >Subject: Re: [mg-tabc] Riley gearbox, again > > > > Hey Hugh/Jenn: > > > > A. Wonder if the Riley/(Morris?) box is as tough as the TC? Sounds like >wide > > intermediate ratios (bad) together with taller final (good). Betcha you > > wouldn't like it, + sounds like a hassle to try it. > > > Don > > TC 7993 > > > > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >

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[David Lodge]

Suspected as much! Have you ever heard a TC/RME whatever start up and drive off? They sound identical. (If you don't believe me check them out at van Dusen in a couple of weeks!) Regards, David Lodge