New Tremec transmission

[hauss]

Yep that is the rail, minis all the work it took to get to that point, also let us not forget we still have to get it back in the car.I have done this procedure 3 times already, in 8k miles. Mr. Esschaider; anyone who has done this one time would gladly spend $200 dollars for a rail that worked. I certainly know I would.I am a retired guy with more time than money and still I would. the $100 would only go to the first 10 people.

[eschaider]

Originally Posted by hauss

Yep that is the rail, minis all the work it took to get to that point, also let us not forget we still have to get it back in the car.I have done this procedure 3 times already, in 8k miles. Mr. Esschaider; anyone who has done this one time would gladly spend $200 dollars for a rail that worked. I certainly know I would.I am a retired guy with more time than money and still I would. the $100 would only go to the first 10 people.

Hauss, in as much as you have already done the market research, determined market size and buyer willingness to purchase at a particular price point, it appears all that is left to take advantage of this excellent business opportunity is for you to contract for the manufacture of these replacement parts and profit handsomely from the sales. I think you should do this sooner rather than later. This could change your personal situation into one of a retired guy now with more money than time.



Ed

[Gaz64]

Ed,

I think you are confusing 2 shafts.

One is the reverse idler shaft, which is a captive shaft for the reverse idler to spin on. The other is the 5th/Rev rail, which is the the rail that has broken in Hauss's case.

I do find it hard to believe how that rail breaks, and yet the roller pin small diameter should fracture first.

[patrickt]

Originally Posted by Gaz64

Ed,

I think you are confusing 2 shafts.

Yep, the original from 1971 was the best. You know, the first one with Richard Roundtree.

[NROTOXIN]

Originally Posted by patrickt

Yep, the original from 1971 was the best. You know, the first one with Richard Roundtree.

He's a bad mother.....shut yo mouth!

[eschaider]

Originally Posted by Gaz64

Ed,

I think you are confusing 2 shafts.

One is the reverse idler shaft, which is a captive shaft for the reverse idler to spin on. The other is the 5th/Rev rail, which is the the rail that has broken in Hauss's case.

I do find it hard to believe how that rail breaks, and yet the roller pin small diameter should fracture first.

You are correct about the two being different parts, Gary but I thought Hauss was describing the reverse idler shaft in his post #102 when he showed this pic of a new and a broken shaft;


The identifier I was using was the roll pin hole in the end of the shaft. It appeared that the shaft was the shaft pictured in Paul's video at time = 35:43 and in the Tremec manual in the image below;



Actually I am relatively agnostic with respect to naming conventions other than for identification purposes as long as they are somewhat representative.

Edit out: The reverse idler shaft apparently experiences an in service forward thrust, which Tremec attempts to blunt as can be seen by the presence of the reverse idler gear thrust washer in the Tremec service manual illustration. The direction of the thrust, if it were great enough, could certainly break the back side of the roll pin hole off the end of the shaft as Hauss has illustrated in his picture in post #102.

Looking at the assembled component I must admit I am struggling with trying to understand where the forward thrust that fractures the end of that shaft is originating from. That said, it is apparent from their use of a thrust washer and Hauss's success in repeatedly breaking the part that the thrust is real and does come from somewhere.>

Edit in: That thrust washer goes inside the main case not outside, which makes more sense. The helix on the gear would push the gear rearward not forward and a thrust washer inside the case would protect the case from the rearward thrust on the gear. That really leaves me at a loss to explain the failure.

The fact remains however, that fourth gear tops out even with a 3.46 (or thereabouts) rear gear set at nearly 200 mph (with 295 tires) which still begs the question, why are we power shifting into fifth gear overdrive down in the second or third gear vehicle speed range? That sort of operation does not seem to either be a smart or a competitive way to drive the car — and could likely be a contributing factor to the repeated component failures Hauss's transmission is experiencing.


Ed

[Gaz64]

The photo above of Hauss's broken 5th/rev rail shows 2 pieces at the fracture point. The roll pin secures the roller that follows the selector lever.

About 20:20 in the video.

Gary

[Anthony]

Originally Posted by Gaz64

The photo above of Hauss's broken 5th/rev rail shows 2 pieces at the fracture point. The roll pin secures the roller that follows the selector lever.

About 20:20 in the video.

Gary

Yes. Looking at the picture and video, it seems to me that the real issue is the hole size for the roller, which seems to be very large in comparison to the diameter of the shaft, and appears to be the location of the fracture, as opposed to the roll pin which is a much smaller hole just beyond the fracture point. Maybe the solution is to make the roller a smaller diameter ? with a new corresponding shaft ?