545 and 645RFE question - Hemi Truck Club
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Old 05-08-2016, 04:16 PM   #1
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545 and 645RFE question

Hey guys so basically after hours of research I concluded to do my plans right I need to beef up my trans first.

Questions I have but can not find answers to are as follows.

545 vs 645 my understanding is they are almost identical transmissions. What is the best place to find parts for the internals. What's the weak links?

Can I use 545 stall converters?


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Old 05-08-2016, 04:43 PM   #2
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Give these guys a call. Sure they could answer your questions.

http://www.hemitruckclub.com/forums/...ons-15396.html Jerry.

45RFE 545RFE 68RFE Performance Transmissions and Transmission Parts from PATC
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Old 05-08-2016, 08:03 PM   #3
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Jerry at super street will have all the info you need. The 545 is the same I believe for the most part main diff they use another apply after 5th to get that 6th gear. But call and ask jerry he will know best
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