sequentail transmission

[steven polaski]

Does anybody out there use a sequentail transmission? How much any benefit ?

[Porschekid962]

this might be better in the racing forum. i do know that they are pretty pricey though. might want to get in touch with guard transmission if you want to pursue it further.

[Jack Olsen]

I saw one in a GT3RSR over the weekend. I was told it was 30K for the transaxle.

[Carrera3.5L]

Is this for a street or competition car? If for the street, forget about it. Sequential transaxles are dog engagement, which means that they are noisy and not very fun in stop and go traffic. The revs also have to be matched on the downshift. Remember, there are no synchro rings inside.

Porsche teams rarely used dog engagement transaxles in their racing cars until Alex Job debuted the Porsche/Holinger devised unit last year which became standard in the GT3RSR for 2004. One of the reasons is that at endurance races such as Daytona and Sebring, many teams would have a couple of "rented" drivers to go along with the paid hot-shoes. Many of the "gentlemen" drivers had little or no experience with dog engagement, and thus would learn the hard way by breaking things. The races are just too important to risk.

There are many companies out there manufacturing sequential transaxles. Hewland, Xtrac, Quaife, etc are just a few and they can cost less than 30K depending on the application. If you want to pay for the Porsche name on the side of the case, then I guess the price is accurate.

[Geary]

Porsche contemplated all the manufactuers you've listed and rejected them in favor of Holinger Engineering, with good reason. However, I predict even superior units in the future.

The GT3RSR transmissions are $30,000 EURO dollars, $38,000 landed in the U.S.

We have sold a couple street sequentials, with special-order helical gears for quieter operation.

Alex Job has experimented with Guard's dog-engagement transmissions ever since Reiser-Callas won at Laguna Seca with a 5-speed G50 version. These were manufactured by Holinger, and the predecessor of today's GT3RSR sequential.