Looking through the site here, all I can come up with is to maybe use a reverse helix driven gear on the speedo cable to mate to a toploader 4 speed drive gear. Is this a fancy way of saying I need a left turn gear? Melvins labels their gears as LH or RH. My car was originally a 3 speed on the column, but has been replaced with a toploader from a 66 fairlane with the gear located on the passenger side. The speedo was never connected to the 4 speed so I don’t have a gear to look at. Just want to make sure I have the correct rotation so I won’t chew up the gears
Here is link to information regarding speedo gear, pictures on post #23........... http://mmb.maverick.to/threads/4-speed-toploader-speedo-cable.117200/ Here is where I purchased my speedo gears......... https://secure.cougarpartscatalog.com/c2dz-17271-g.html?sessionthemeid=26 David
Thanks. I believe my drive gear is black but seems to match the teeth cut of the brown in your picture. Since the tranny is out of the car, I’m going to take the tail shaft off and make sure I get something that matches.
When I first installed my Toploader 4 speed into my 74 Comet, the original speedo cable (C4 with speedo location LH side) was long enough to reach RH side speedo location on the tailhousing. If you do have the "black" drive gear (on the main shaft), it should be 7 tooth. Depending on what rear end gear ratio you have and tire diameter, should work with 2.80 to 3.50 you should be able to use West Coast Classic Cougar's speedo calculator to find correct (or closest) speedo gear. approx. with 7 tooth drive drive rear end gear: 2.80 17 tooth speedo gear 3.08 18 3.27 19 3.50 20 3.70 21 David This should be what you have, or at least angle of teeth on your Toploader with RH (passenger side) location of speedo To properly determine the number of teeth on Main Drive Gear, count the "flats" (in red) on side of gear........ Black MDG has 7 teeth
I have the black. I found an old driven gear from my donor car. It appears to be a right hand and I need the left hand like the white one in your picture.
Yes, that speedo gear is for LH side, do you know what rear end gear ratio you have? WCCC had the best price for new speedo gears at $8.25 each. David
Yeah. It’s a 2.79. Tire size around 26 inches tall. The calculation I did was a 15 tooth gear but I think they only make a 16 or higher.
If you use a 16 T speedo gear, you probably will be pretty close, otherwise you would have to change the MDG on output shaft to 8 T along with 17 T speedo gear. Also, I think you would have a hard time locating a 8 T MDG, as most common are 6 and 7 T and if you do find a correct 8 T, be prepared to pay dearly........ I have a 8 T, but it is clocked for speedo on drivers side. You can try contacting: https://www.ebay.ca/itm/164155166047?hash=item2638690d5f:g:cmgAAOSwC4ZejwTY they may have a 8 T MDG? Just be very specific as to what you have, Toploader 4 speed with speedo on RH Passenger side! Good luck! IMO, I would just stay with MDG you have and just get a 16 T speedo gear, removing the snap ring on output shaft is a PAIN and they get all deformed and almost unusable, plus it requires a special snap ring tool! https://www.tciauto.com/speedometer-gear-calculator Ford did list a 15 T speedo gear, C3DZ-17271-A
The toploader takes no special gear. It's the same one that is used with any maverick transmission. I have a toploader in my Sprint.
Depending on which side the speedo gear is on the tailshaft, they are RH and LH specific.....post #4 picture is matched set for speedo on RH side. Picture below shows "pink" gear is MDG (Main Drive Gear) for speedo on RH side, "brown" MDG and speedo gear is for LH side, which is what our Mav/Comet use. See how angle on teeth are different. See how matched brown/grey, alignment is perfectly vertical. below shows what happens when mis-matched, alignment is off and will cause either MDG or speedo gear to get chewed up! David
If your speedometer cable isn't long enough, just buy one for a 70 Mustang with 4 speed. That's what I have in my Sprint.
No they are not. Toploader takes the same gears as the 3 speed manual. I have a toploader in my Sprint and took no special gear.
Member was missing speedo gear, so he wanted to know what correct one looked like, which is what I have pictured in post #4......... If the Toploader 3 speed that came on our Mav/Comet has speedo gear on RH then can be used with 4 speed, so long as on same side. C4 auto's on our Mav/Comet came with speedo on LH side. On my 74 Comet, when I changed out C4 to Toploader, I had to change speedo for RH side. Toploaders had speedo gears on RH or LH sides, Mustang/Cougars where on RH side, others like certain year Falcon/Fairlaines/Galaxies where on LH side. David
