WackyDoka

Sure, that is why I thought it might be a good idea to reverse the rotation by changing the reduction gear of the 4EAT. Installing an adiitional gear wheel for reverse and thus change to reverse rotation from 1:1 ratio to a 1:1.3 ratio. The new reduction gear would consist of a 37 tooth, a 25 tooth for reverse and a 47 tooth on the pinion shaft. An additional small shaft and bearing would need to be installed for the 25 tooth reverse wheel.

Well, due to the torque output from the EJ25, in this heavy vehicle, the VW transaxle (currently 4spd Manual) might not last long as it was only designed for a torque of up to max. 180-200 Nm. Therefore I try to use the full EJ25 + 4EAT powertrain setup that has to be reversed in output rotation due to rear engine Installation (engine behind transaxle

OK, update: Reverse R&P is not possible due to geometry of differential housing and ex-centric position of pinion shaft after looking more detailed to the FSM of the '97 Legacy 4EAT. Alternative: Change to reverse rotation in reduction gear at opposite end of transmission by changing 1:1 ratio to a 1:1.3 ratio and using an additional gear wheel to reverse - this will be the plan to discuss with my gear maker. by this I will achieve a ~ 6.x ratio using the 4.44 R&P setup. Anyone has experience with such a modification to the 4 EAT?

Hey super, that's good news. Thanks a lot. I hope to have some more details on the R&P geometry and design.

Hi, my name is Thilo and I'm from Germany. I want to transplant a MY'97 EJ25 DOHC with 4EAT from a Legacy into a VW Type 2 motorhome (Karmann Gipsy). I'm experienced with the original VW manual transmissions / gear ratios and plan the manufacture of a reversed R&P that should be able to serve in a 2,5 ton vehicle at moderate engine speeds providing a top speed of max. 120kph / 75mph. The intended cruising speed would be around 100kph / 65mph. Here my questions now: Where do I get some drawings /geometrial data of the 4EAT differential to get basic dimensions to forward to my gearmaker for discussion? Can anyone tell me about the gear ratio configuration of a TZ102Z3CAR-DJ and the differential drive ratio? Edit: OK, that's answered by forum search. It should be 4,444 44/9. To achieve the above weight and cruise speed with the gears, the R&P ratio should be in the range of 5,8 to 6,3. Such ratios are available in the VW transmissions. How can/should I block(?) the original SBR rear drive transmission outlet shaft to have the full torque on the front differential (that will become the reversed rear differential on the VW Motorhome)? Thank you for helping me, I wll keep you updated on my findings. Thilo