Sad Story On a Gear Vendors OD

rumblefish360 said

I’d go to his web site for information on his 5spd OD trans. I can tell you this about it though, it is not set up (the overdrive) like the Chrysler band aid move.
As far as any towing is concerned, I wouldn’t worry about it because it is a manual and if you needed the extra torque on the road, you would leave it in 4th gear. Since you understand that lugging an engine is bad, the trans is a manual you select the gear in and get the idea of engine rpm and gear selection for best advantage, I don’t understand the worry.

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Good point about towing. You wouldn't use in any incline. My point is that historically OD gears were weaker by there very nature. Not sure I would be banging one in a speed attempt? Like the drag diesels? I understand they typically have a very high rear gear. But with that low of RPM? They must be using an OD to get there MPH? I toasted an old Ford 4 speed with OD. Towing a relatively light load in OD on a flat freeway. Now it was old and could very well been coincidental. I somehow got it in 4th gear and made it back due to no stopping. Dying halfway up driveway. Truck was old enough to junk thus didn't investigate much. I am inquiring because I'm doing a high horse/torque build at relatively low RPM. (6500 red line) to get anything above 160 MPH? A OD option will be needed with 3.54:1 dana. I'm just worried what any OD would do with 1000+ ft/lbs of torque on it? GV is the leading (and possibly) only real option? (On back of a JW glide that I do have on hand.) But still 1:1 final gear.