I WILL GET YOU SOURCE TOMORROW FOR ANY TOPLOADER PART YOU NEED.A rare failure indeed. 4th gear? No real way to tell at this point but I'd guess one of the teeth got chipped and failed under use. Those gears are very hard so they would need to likely get a crack from being dropped or forced together during assembly from someone unfamiliar with toploader assembly techniques. Complete renovation was unlikely because all the kits I've seen over the past 10 years have used plastic thrust washers. The metal copper lined ones may have simply been reused based on the preference of the builder, but if they were reused then what else was reused? The tarnished color of the brass synchronizer rings eluded to this transmission refurbishment not being recent and in my experience this was merely a cosmetic restoration.
That seems to be a well-sorted company, should contact them.Very unusual failure. Contact this company http://www.4speedtoploaders.com for information about what could cause this failure and for replacement parts.
Chuck
The one in the picture is bought repro to 70 Mustang!I notice in your picture, the shifter mechanism has the boot around it. I bought and tried to fit one for a 70 Mustang as they (NPD) don't list one for the 71-73. It didn't fit. Mind you, I was on my back under the car. I know that my 71 did have one as parts of it remained.
Does the 70 part actually fit the 71? If not are the now available as repops?
Geoff.
It is the input shaft as well as the corresponding drive on cluster gear that has broken.A rare failure indeed. 4th gear? No real way to tell at this point but I'd guess one of the teeth got chipped and failed under use. Those gears are very hard so they would need to likely get a crack from being dropped or forced together during assembly from someone unfamiliar with toploader assembly techniques. Complete renovation was unlikely because all the kits I've seen over the past 10 years have used plastic thrust washers. The metal copper lined ones may have simply been reused based on the preference of the builder, but if they were reused then what else was reused? The tarnished color of the brass synchronizer rings eluded to this transmission refurbishment not being recent and in my experience this was merely a cosmetic restoration.
Interesting! Personally, I could see no reason why the 70 version would NOT fit as it is the same box and shifter mechanism, although the opening in the tunnel may be slightly different. From what I remember, the opening in the rubber boot where it goes around the levers was not the same as the remains I took out on the 71. These are not cheap parts, but I may look at one again as I don't like the unprotected mechanism. However, the owner of the shop where my box was rebuilt, prefers not to use them as they can hold dirt in and cause damage to the mechanism. Hmmm!The one in the picture is bought repro to 70 Mustang!I notice in your picture, the shifter mechanism has the boot around it. I bought and tried to fit one for a 70 Mustang as they (NPD) don't list one for the 71-73. It didn't fit. Mind you, I was on my back under the car. I know that my 71 did have one as parts of it remained.
Does the 70 part actually fit the 71? If not are the now available as repops?
Geoff.
Bought two so I have a similar to my 70 Boss.
// Thomas
They do break easier than you think with big tires and torque. My X broke one with a bone stock 73 351 C. Mustang. If you are going to have big HP and torque with big tires you have to use something better than a toploader.Thomas, with what engine have you ripped the Toploader apart? In my experience it takes streettires with 3400 lbs and a 572 cid 750 hp and you're going to brake the Nascar toploader. Not in the first or second gear but when it starts to hook.
Wow that was a big mistake. It had a bunch of backlash for sure. Just hitting on the tip of the teeth.The reason that the gear box broke was that the person who renovated it had put in the wrong input shaft. It only had 22 teeth and it should be 23. So it did not match the cluster gear. It has had a mysterious sound all the time on the first three gears. Now I know why. I prefer to do as much as I can by my self on my cars so I can not blame anyone else.
// Thomas
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