Transmission mount suggestions
Thread Starter
Teching In
Joined: Apr 2016
Posts: 29
Likes: 0
From: Plymouth, MA
Transmission mount suggestions My car originally had a power glide. As luck would have it the transmission mount from the power glide bolts right on to my new 5-speed. The only problem I have is that it is approx 1.5" to tall to fit between the transmission and the cross member. I could notch my cross member, but to save and effort I though I would ask if anyone has any suggestions on a low profile mount or maybe a source for custom mounts.
Thanks.
Thanks.
Thread Starter
Teching In
Joined: Apr 2016
Posts: 29
Likes: 0
From: Plymouth, MA
thanks, but my cross member will work fine with some modification. I can notch it and weld in a little valley to lower the mount. I just figured a different $20 mount from the parts store would save me some aggravation.
Thanks for the suggestion though.
Thanks for the suggestion though.
A few things:
You haven't mentioned validating the transmission is set correctly for height. In general, setting the mainshaft centerline where the original was gets good results. "But I don't want to cut my floor" isn't a reason to change this. Unless you want to be one of the guys with cockeyed driveline angles who claims it works . . . Except above 73mph.
There are a few heights available in a a GM mount, but 1.5" is a huge amount to expect an aftermarket solution to exist. You can't expect good vibration, noise dampening.
72 Nova, right? Post what vehicle it is for. And what 5 speed? Does it even have a GM mount pattern?
You lucked out perhaps with crossmember fore/aft positioning. But now you think you're entitled to not change / mod your crossmember and possibly floor. Get real and get cutting.
You haven't mentioned validating the transmission is set correctly for height. In general, setting the mainshaft centerline where the original was gets good results. "But I don't want to cut my floor" isn't a reason to change this. Unless you want to be one of the guys with cockeyed driveline angles who claims it works . . . Except above 73mph.
There are a few heights available in a a GM mount, but 1.5" is a huge amount to expect an aftermarket solution to exist. You can't expect good vibration, noise dampening.
72 Nova, right? Post what vehicle it is for. And what 5 speed? Does it even have a GM mount pattern?
You lucked out perhaps with crossmember fore/aft positioning. But now you think you're entitled to not change / mod your crossmember and possibly floor. Get real and get cutting.
Thread Starter
Teching In
Joined: Apr 2016
Posts: 29
Likes: 0
From: Plymouth, MA
It's a 72 Nova that originally had a 250 with a powerglide. It now has a 4.8 Silverado engine backed by an S10 NV3500 5 speed.
I'm well aware I will probably have to modify my cross member, but wouldn't it be nice if I didn't have to. Apparently I wasn't clear, but I wasn't looking for a 1.5" tall mount. I was looking fro a mound that was 1.5" shorter than the stock mount.
I know this is not the topic of this thread, but as it was brought up I have to ask. I have been fussing with the angles and I am quite confused by all this. The mount question obviously can't be considered until I get the angles correct. Right now my angle finder shows my transmission angle is 4 degrees down, the drive shaft is 1 degree down and the pinion is 2 degrees up. If I'm correct that gives me a 3 degree operating angle at each end of the driveshaft.
Much of what I have read says this is what I should strive for. That equal operating angles with ensure proper u-joint operation. Others have said the transmission and pinion angles should be equal, but opposite, which mine are clearly not. I suspect that if I adjust the transmission and pinion angles to be equal, but opposite the resulting driveshaft angle will change my operating angles to something other than equal.
So which is it? Equal but opposite transmission and pinion angles or operating angles?
I'm well aware I will probably have to modify my cross member, but wouldn't it be nice if I didn't have to. Apparently I wasn't clear, but I wasn't looking for a 1.5" tall mount. I was looking fro a mound that was 1.5" shorter than the stock mount.
I know this is not the topic of this thread, but as it was brought up I have to ask. I have been fussing with the angles and I am quite confused by all this. The mount question obviously can't be considered until I get the angles correct. Right now my angle finder shows my transmission angle is 4 degrees down, the drive shaft is 1 degree down and the pinion is 2 degrees up. If I'm correct that gives me a 3 degree operating angle at each end of the driveshaft.
Much of what I have read says this is what I should strive for. That equal operating angles with ensure proper u-joint operation. Others have said the transmission and pinion angles should be equal, but opposite, which mine are clearly not. I suspect that if I adjust the transmission and pinion angles to be equal, but opposite the resulting driveshaft angle will change my operating angles to something other than equal.
So which is it? Equal but opposite transmission and pinion angles or operating angles?
