what trans does the 03 4.7 Durango have? is it the 45rfe or the 545rfe? I'm also thinking of getting a tune-up done on it, as its last tune-up was at 120k and is now at 295k. I'm curious if I should have a tune-up done on it while I have the engine pulled out for a rebuild. is there any symptoms of loose transmission bands ect? I don't want to spend the money if I don't want to. also, what is normal operation for the transmission, and what speeds should it shift into other gears. and how long it should take? I notice some shifts seem to be slow but that could be me. any help is appreciated.
The rebuild kit for the transmissions are the same whether it’s a 45 or 545 trans. There are no bands in these. Steels and clutches only. I’d recommend Red Alto Clutches.
Replace weak/broken TC limit spring in Chrysler 45RFE, 545RFE, 65RFE, 66RFE, 68RFE units with more durable Sonnax torque converter limit spring #44912-02.
There is an ASTG service / rebuild manual out there. I have the PDF. YOu can find it with a quick search.
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