Re: Transmission questions ('49 with R-9 overdrive)
Posted by Tom in KCMO On 2014/2/8 12:40:05
Hello again,
Another question, I'd like to replace the rear mainshaft bearing in the R9 overdrive. The original is still a little rough after cleaning & re-oiling and it looks like it may have "spun" (outer race spun within the overdrive housing) at some point during its life.
An email to SKF indicates that the original, a MRC 5206 BSF2, was a "special" and is not available. Their advice is to use a standard size 5206 (1 1/16" width) and add spacers to make up the difference.
It looks like Max Merritt looks sells an original for $250. Kanter sells a "kit" for $90 though I'm not sure if this is an original bearing or a thinner bearing with spacers (have an email in to Kanter for more info).
The original bearing has an inner race that protrudes several mm from the outer race. The drive shaft U-joint flange bolts onto the end of the main shaft and sandwiches the bearing between the speedo gear and the U-joint flange. In this configuration, the bearing carries the overdrive mainshaft and has to handle considerable thrust and angular torque. As such, I'm worried that a kit with spacers isn't an optimal replacement.
TL;DR
Anyone know of a less expensive source than the $250 from Max Merrit for a R9 rear bearing? Alternatively, has anyone had success with a bearing / spacer replacement kit?
Thanks for your time,
Tom in KC
Attach file:
(107.31 KB)
Another question, I'd like to replace the rear mainshaft bearing in the R9 overdrive. The original is still a little rough after cleaning & re-oiling and it looks like it may have "spun" (outer race spun within the overdrive housing) at some point during its life.
An email to SKF indicates that the original, a MRC 5206 BSF2, was a "special" and is not available. Their advice is to use a standard size 5206 (1 1/16" width) and add spacers to make up the difference.
It looks like Max Merritt looks sells an original for $250. Kanter sells a "kit" for $90 though I'm not sure if this is an original bearing or a thinner bearing with spacers (have an email in to Kanter for more info).
The original bearing has an inner race that protrudes several mm from the outer race. The drive shaft U-joint flange bolts onto the end of the main shaft and sandwiches the bearing between the speedo gear and the U-joint flange. In this configuration, the bearing carries the overdrive mainshaft and has to handle considerable thrust and angular torque. As such, I'm worried that a kit with spacers isn't an optimal replacement.
TL;DR
Anyone know of a less expensive source than the $250 from Max Merrit for a R9 rear bearing? Alternatively, has anyone had success with a bearing / spacer replacement kit?
Thanks for your time,
Tom in KC
Attach file:
(107.31 KB)
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