TRS gears ....
04-01-2015 | 04:39 AM
#3
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From: Olmsted Falls,Ohio Marblehead,Oh
Yaaaaa hhaha I am just curious why nobody tried to make them to get some more power to them..I just got a set of brand new lower gears, let's see how long they last...
04-01-2015 | 06:27 AM
#5
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From: chicago
Probably wouldnt be worth it. If the gears were stronger, the next weak link would be vertical shaft, twisting prop shaft, etc. The entire drive, is really not designed for high power.
My personal experiance with TRS boats, is they work great if not overpowered. I never had a lick of trouble with them behind 454/420's. As far as putting some power thru them, I twisted the splines on one, broke a couple sets of lower gears, and one upper gear set, in a couple seasons. My buddy two summers ago, broke a lower gear set running hard. When the gear set blew, the drive locked up, and shattered his damper plate so bad, that it shot out a spring, and blew a hole in his engine to trans bellhousing. He didnt enjoy that. Not only a blown drive, but the motor had to come out as well.
I don't know how these guys on facebook claim they are running 750hp thru them successfully. The old SSM 3, 4, 5, 6 drive, used twin downshafts, to turn two sets of gears in the lower. Physically, the lower gears can only be so large, without having a riduculously large lower case, that would hurt speed. By having two downshafts, the load on the lower gears can be split 50/50. So, if you have 750HP, each lower gear would see 375hp if setup right. And those were straight cut gears. It was a great design imo.
When you look at a bravo or trs, they simply have one shaft, one set of lower gears to handle the torq. The gears are small, and can only handle so much. When you start getting into big power, its no surprise they fail.
My personal experiance with TRS boats, is they work great if not overpowered. I never had a lick of trouble with them behind 454/420's. As far as putting some power thru them, I twisted the splines on one, broke a couple sets of lower gears, and one upper gear set, in a couple seasons. My buddy two summers ago, broke a lower gear set running hard. When the gear set blew, the drive locked up, and shattered his damper plate so bad, that it shot out a spring, and blew a hole in his engine to trans bellhousing. He didnt enjoy that. Not only a blown drive, but the motor had to come out as well.
I don't know how these guys on facebook claim they are running 750hp thru them successfully. The old SSM 3, 4, 5, 6 drive, used twin downshafts, to turn two sets of gears in the lower. Physically, the lower gears can only be so large, without having a riduculously large lower case, that would hurt speed. By having two downshafts, the load on the lower gears can be split 50/50. So, if you have 750HP, each lower gear would see 375hp if setup right. And those were straight cut gears. It was a great design imo.
When you look at a bravo or trs, they simply have one shaft, one set of lower gears to handle the torq. The gears are small, and can only handle so much. When you start getting into big power, its no surprise they fail.
04-01-2015 | 06:32 AM
#6
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From: Olmsted Falls,Ohio Marblehead,Oh
04-01-2015 | 06:35 AM
#7
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Joined: Oct 2005
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From: Olmsted Falls,Ohio Marblehead,Oh
Probably wouldnt be worth it. If the gears were stronger, the next weak link would be vertical shaft, twisting prop shaft, etc. The entire drive, is really not designed for high power.
My personal experiance with TRS boats, is they work great if not overpowered. I never had a lick of trouble with them behind 454/420's. As far as putting some power thru them, I twisted the splines on one, broke a couple sets of lower gears, and one upper gear set, in a couple seasons. My buddy two summers ago, broke a lower gear set running hard. When the gear set blew, the drive locked up, and shattered his damper plate so bad, that it shot out a spring, and blew a hole in his engine to trans bellhousing. He didnt enjoy that. Not only a blown drive, but the motor had to come out as well.
I don't know how these guys on facebook claim they are running 750hp thru them successfully. The old SSM 3, 4, 5, 6 drive, used twin downshafts, to turn two sets of gears in the lower. Physically, the lower gears can only be so large, without having a riduculously large lower case, that would hurt speed. By having two downshafts, the load on the lower gears can be split 50/50. So, if you have 750HP, each lower gear would see 375hp if setup right. And those were straight cut gears. It was a great design imo.
When you look at a bravo or trs, they simply have one shaft, one set of lower gears to handle the torq. The gears are small, and can only handle so much. When you start getting into big power, its no surprise they fail.
My personal experiance with TRS boats, is they work great if not overpowered. I never had a lick of trouble with them behind 454/420's. As far as putting some power thru them, I twisted the splines on one, broke a couple sets of lower gears, and one upper gear set, in a couple seasons. My buddy two summers ago, broke a lower gear set running hard. When the gear set blew, the drive locked up, and shattered his damper plate so bad, that it shot out a spring, and blew a hole in his engine to trans bellhousing. He didnt enjoy that. Not only a blown drive, but the motor had to come out as well.
I don't know how these guys on facebook claim they are running 750hp thru them successfully. The old SSM 3, 4, 5, 6 drive, used twin downshafts, to turn two sets of gears in the lower. Physically, the lower gears can only be so large, without having a riduculously large lower case, that would hurt speed. By having two downshafts, the load on the lower gears can be split 50/50. So, if you have 750HP, each lower gear would see 375hp if setup right. And those were straight cut gears. It was a great design imo.
When you look at a bravo or trs, they simply have one shaft, one set of lower gears to handle the torq. The gears are small, and can only handle so much. When you start getting into big power, its no surprise they fail.
04-01-2015 | 07:14 AM
#10
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From: Olmsted Falls,Ohio Marblehead,Oh
