G-50 Transaxle ('90 and Newer - normally aspirated)
NOTE: All adapter kits listed below are designed to mate an LS series Chevy V-8 motor to the Porsche transaxle. Many other adapter kits are available, but cost may differ according to your motor and transaxle choice, clutch requirements, and application.
In 1990, the G-series transaxles had replaced all the older designs in the 911 body style. Quicker and smoother shifting, greater reliability, and the aid of hydraulics to operate the larger clutches, really made the driving experience much more enjoyable. Gear ratios in the NA transaxles, however, remained a little short in 4th and 5th for V-8 applications, so we have selected a terrific set of gears that will increase your potential top speed to over 200MPH at 6500RPM.
Porsche made two major changes in the external design of the G-series transaxles for 1990. A single protruding mono mount point (often referred to as the "donut" mount) was cast into the nose cover, and the bellhousing & starter pocket were changed to accommodate a new clutch component and starter design. The "donut" mount can be exchanged for an earlier '87 to '89 mount with minimal effort (or can be made to work with our billet nose mounting plate), but the bellhousing and starter pocket changes were not easily accepted into the kit car industry.
No less than four different designs have been attempted to rectify the starter-to-ring-gear positioning issue with regard to high compression motors. Yes, it is quite confusing... but OUR design has been used successfully for many years now and has been accepted as the industry standard. In short, we modify the starter pocket and the bellhousing on the '90 and newer transaxle so that the more desirable '87 to '89 G-series clutch components and starter can be used. Yes... this allows the very popular gear reduction type starters to be used to crank over higher compression motors such as the LS-series GM motors. (Stock Porsche starters cannot handle the extreme duty.) The modifications do not, however, damage or weaken the transaxle.
Due to the demand for transaxles capable of handling higher horse power like the Porsche G-series, yet the need for a compact (shorter) design for kit car applications, Renegade offers a side shifter conversion to the G-series transaxles. This custom modification allows us to remove the stock shift shaft from the nose (or tail in a mid-engine design), and add a new billet housing and shift shaft assembly to the side of the transaxle. The result is a smoother shifting tranny in a much shorter space. ( picture )
Further advancements needed with regard to the "donut" nose of the transaxle opposite the bellhousing, prompted Renegade to develop a new billet end plate that offers a finished look to the rear of the tranny (in a mid engine application). Furthermore, mounting tabs were designed into this plate to facilitate easy connection to the chassis. (This "end" plate can only be used with our side shifter modification.)
We offer conversion components for the '90 and newer G-50 series transaxles (including '90 and newer turbo) for mid and rear engine application. The Porsche normally aspirated transaxle (G-50) is best used with motors up to 500 HP. For mid engine application, all G-series transaxles are inverted for proper operation. This requires an adapter plate with the inverted pattern.
NOTE: Prices below include our cores. If the customer supplies cores, cost may be less. Subject to availability.
G-50: '90 and newer G-50 transaxle, completely rebuilt, (mid or rear engine), taller 4th and 5th gears, with bellhousing modifications and a starter pocket modification: $9,200
Optional: Billet side shifter assembly as indicated above: $1,600
Optional: LS-series adapter plate, custom flywheel, pilot bearing, dust shield, and adapter kit hardware, plus stage two pressure plate, Kevlar clutch disc, throw out bearing with upgraded guide tube and "O" ring, hardened starter ring gear, and all Porsche armature "release" components (except slave): $2,955
Optional: Stage three, high torque, light weight, gear reduction style starter: $289
Optional: Billet nose (end) mounting plate: $550
Optional: In/out fittings and installation for external cooler, pump, filter, etc: $250
Optional: Custom cable shifter to be used with our billet side shifter assembly ( picture ): $800 (up to 100 inches)
Optional: Shortening of the bellhousing and input shaft (lighter clutch components/shorter tranny): $850
Optional: Ring and pinion spray, specific gear spray, or complete spray bars installed: Inquire
Optional: External cooler with fan, filters, pumps, lines, etc: Inquire
The preceding descriptions give you an application, approximate HP rating, and price, to help you choose the correct transaxle and create a budget for your project. Depending on your specific application, performance expectations, clutch specification, gear ratios, HP capabilities, and other variables, cost may change. For more information, and specifics to your unique project, please feel free to contact Renegade.
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