GC WJ 4.7 2001 - boite 4 ou 5 rapports?
Posté : lun. oct. 28, 2013 9:05 pm
Salut la compagnie,
Je fouille sur le net à la recherche de ma future et j'arrive pas à savoir si la boite auto sur un 4.7 LIMITED de 2001 est à 4 ou 5 rapports
D'après ce que je lis ici http://www.wjjeeps.com/newoptions.htm#2001
A partir de 2001 il y aurait 5 rapports via une "reprog" !!?? de l'ancienne boite à 4...
Automatic transmission, new 545RFE five-speed with 4.7-liter engine provides a second overdrive ratio for increased highway fuel economy and reduced engine noise at highway speeds (Note: A Flash upgrade was introduced on September 15, 2000 which when performed on 1999 and 2000 models adds the new second overdrive ratio to upgrade those transmissions to 5-speeds)
On en parle ici aussi http://en.wikipedia.org/wiki/Jeep_Grand_Cherokee
The 45RFE and 545RFE automatic transmission in the WJ was notable. It included three planetary gear sets rather than the two normally used in a four-speed automatic. This gave it six theoretical speeds, and it would have been the first six-speed transmission ever produced in volume, but it was programmed to only use five of these ratios. Four were used for upshifts, with a different second gear for downshifts. Although five of the six ratios were used, Chrysler decided to call it a "4-speed automatic". In 2001, the programming was changed to make use of all six ratios. Rather than have six forward gears, the transmission was programmed to act as a five-speed with the alternate second gear for downshifts. The rpm at 70 miles per hour (110 km/h) on a 545RFE is 2000 rpm, 200 rpm less than the 45RFE programming. 1999 and 2000 model year WJ owners can have their 45RFE transmission's programming flashed to enable the extra gear as both transmissions are physically the same. The 42RE 4-speed automatic remained the transmission for the Inline 6 engine. It had slight changes from the previous model Grand Cherokee.
Quelqu'un en saurait il d'avantage?
En 2001, les 2 boites auraient t'elle existées?
Le tout sur 4.7 LIMITED non HO
Merci pour votre aide
Je fouille sur le net à la recherche de ma future et j'arrive pas à savoir si la boite auto sur un 4.7 LIMITED de 2001 est à 4 ou 5 rapports
D'après ce que je lis ici http://www.wjjeeps.com/newoptions.htm#2001
A partir de 2001 il y aurait 5 rapports via une "reprog" !!?? de l'ancienne boite à 4...
Automatic transmission, new 545RFE five-speed with 4.7-liter engine provides a second overdrive ratio for increased highway fuel economy and reduced engine noise at highway speeds (Note: A Flash upgrade was introduced on September 15, 2000 which when performed on 1999 and 2000 models adds the new second overdrive ratio to upgrade those transmissions to 5-speeds)
On en parle ici aussi http://en.wikipedia.org/wiki/Jeep_Grand_Cherokee
The 45RFE and 545RFE automatic transmission in the WJ was notable. It included three planetary gear sets rather than the two normally used in a four-speed automatic. This gave it six theoretical speeds, and it would have been the first six-speed transmission ever produced in volume, but it was programmed to only use five of these ratios. Four were used for upshifts, with a different second gear for downshifts. Although five of the six ratios were used, Chrysler decided to call it a "4-speed automatic". In 2001, the programming was changed to make use of all six ratios. Rather than have six forward gears, the transmission was programmed to act as a five-speed with the alternate second gear for downshifts. The rpm at 70 miles per hour (110 km/h) on a 545RFE is 2000 rpm, 200 rpm less than the 45RFE programming. 1999 and 2000 model year WJ owners can have their 45RFE transmission's programming flashed to enable the extra gear as both transmissions are physically the same. The 42RE 4-speed automatic remained the transmission for the Inline 6 engine. It had slight changes from the previous model Grand Cherokee.
Quelqu'un en saurait il d'avantage?
En 2001, les 2 boites auraient t'elle existées?
Le tout sur 4.7 LIMITED non HO
Merci pour votre aide
